diff --git a/Sources/Auth/AuthClient.swift b/Sources/Auth/AuthClient.swift
index 12dc3e43..54678363 100644
--- a/Sources/Auth/AuthClient.swift
+++ b/Sources/Auth/AuthClient.swift
@@ -1122,10 +1122,12 @@ public final class AuthClient: Sendable {
 
     if let jwt {
       request.headerFields[.authorization] = "Bearer \(jwt)"
+      let (data, _) =  try await api.execute(for: request, from: nil)
+      return try configuration.decoder.decode(User.self, from: data)
+    } else {
+      let (data, _) = try await api.authorizedExecute(for: request, from: nil)
+      return try configuration.decoder.decode(User.self, from: data)
     }
-
-    let (data, _) = try await api.authorizedExecute(for: request, from: nil)
-    return try configuration.decoder.decode(User.self, from: data)
   }
 
   /// Updates user data, if there is a logged in user.
diff --git a/Sources/Auth/AuthClientConfiguration.swift b/Sources/Auth/AuthClientConfiguration.swift
index 17289a85..c7917599 100644
--- a/Sources/Auth/AuthClientConfiguration.swift
+++ b/Sources/Auth/AuthClientConfiguration.swift
@@ -83,7 +83,7 @@ extension AuthClient {
       },
       autoRefreshToken: Bool = AuthClient.Configuration.defaultAutoRefreshToken
     ) {
-      let headers = headers.merging(with: Configuration.defaultHeaders)
+      let headers = Configuration.defaultHeaders.merging(headers) { $1 }
 
       self.url = url ?? defaultAuthURL
       self.headers = headers
diff --git a/Sources/Auth/Internal/APIClient.swift b/Sources/Auth/Internal/APIClient.swift
index 2a9e36c8..2abd1c00 100644
--- a/Sources/Auth/Internal/APIClient.swift
+++ b/Sources/Auth/Internal/APIClient.swift
@@ -35,12 +35,9 @@ struct APIClient: Sendable {
   func execute(
     for request: HTTPRequest,
     from bodyData: Data?
-  ) async throws -> (
-    Data,
-    HTTPResponse
-  ) {
+  ) async throws -> (Data, HTTPResponse) {
     var request = request
-    request.headerFields = HTTPFields(configuration.headers).merging(with: request.headerFields)
+    request.headerFields = request.headerFields.merging(configuration.headers) { $1 }
 
     if request.headerFields[.apiVersionHeaderName] == nil {
       request.headerFields[.apiVersionHeaderName] = apiVersions[._20240101]!.name.rawValue
diff --git a/Sources/Functions/FunctionsClient.swift b/Sources/Functions/FunctionsClient.swift
index 45812090..782b8904 100644
--- a/Sources/Functions/FunctionsClient.swift
+++ b/Sources/Functions/FunctionsClient.swift
@@ -236,8 +236,12 @@ public final class FunctionsClient: Sendable {
       url: url
         .appendingPathComponent(functionName)
         .appendingQueryItems(options.query),
-      headerFields: mutableState.headers.merging(with: options.headers)
+      headerFields: mutableState.headers.merging(options.headers) { $1 }
     )
+	  
+	if options.body != nil && request.headerFields[.contentType] == nil {
+	  request.headerFields[.contentType] = "application/json"
+	}
 
     if let region = options.region ?? region {
       request.headerFields[.xRegion] = region
diff --git a/Sources/Functions/Types.swift b/Sources/Functions/Types.swift
index afa734fc..f7356f07 100644
--- a/Sources/Functions/Types.swift
+++ b/Sources/Functions/Types.swift
@@ -65,7 +65,7 @@ public struct FunctionInvokeOptions: Sendable {
     }
 
     self.method = method
-    self.headers = defaultHeaders.merging(with: headers)
+    self.headers = defaultHeaders.merging(headers) { $1 }
     self.region = region
     self.query = query
   }
diff --git a/Sources/Helpers/HTTP/HTTPClient.swift b/Sources/Helpers/HTTP/HTTPClient.swift
index 09e83170..8b277dc5 100644
--- a/Sources/Helpers/HTTP/HTTPClient.swift
+++ b/Sources/Helpers/HTTP/HTTPClient.swift
@@ -32,8 +32,12 @@ package actor HTTPClient: HTTPClientType {
     _ request: HTTPRequest,
     _ bodyData: Data?
   ) async throws -> (Data, HTTPResponse) {
-    var next: @Sendable (HTTPRequest, Data?) async throws -> (Data, HTTPResponse) = {
-      return try await self.fetch($0, $1)
+	  var next: @Sendable (HTTPRequest, Data?) async throws -> (Data, HTTPResponse) = { request, bodyData in
+	  var request = request
+	  if bodyData != nil && request.headerFields[.contentType] == nil {
+		request.headerFields[.contentType] = "application/json"
+	  }
+      return try await self.fetch(request, bodyData)
     }
 
     for interceptor in interceptors.reversed() {
diff --git a/Sources/Helpers/HTTP/HTTPFields.swift b/Sources/Helpers/HTTP/HTTPFields.swift
index 141e1927..e06ca019 100644
--- a/Sources/Helpers/HTTP/HTTPFields.swift
+++ b/Sources/Helpers/HTTP/HTTPFields.swift
@@ -9,17 +9,21 @@ extension HTTPFields {
     return .init(keyValues, uniquingKeysWith: { $1 })
   }
 
-  package mutating func merge(with other: Self) {
-    for field in other {
-      self[field.name] = field.value
-    }
+  package mutating func merge(
+    _ other: Self,
+    uniquingKeysWith combine: (String, String) throws -> String
+  ) rethrows {
+    self = try self.merging(other, uniquingKeysWith: combine)
   }
-
-  package func merging(with other: Self) -> Self {
+  
+  package func merging(
+    _ other: Self,
+    uniquingKeysWith combine: (String, String) throws -> String
+  ) rethrows -> HTTPFields {
     var copy = self
 
     for field in other {
-      copy[field.name] = field.value
+      copy[field.name] = try combine(self[field.name] ?? "", field.value)
     }
 
     return copy
diff --git a/Sources/Helpers/HTTP/LoggerInterceptor.swift b/Sources/Helpers/HTTP/LoggerInterceptor.swift
index 226493be..564115a3 100644
--- a/Sources/Helpers/HTTP/LoggerInterceptor.swift
+++ b/Sources/Helpers/HTTP/LoggerInterceptor.swift
@@ -31,6 +31,10 @@ package struct LoggerInterceptor: HTTPClientInterceptor {
       )
 
       do {
+        var request = request
+        if bodyData != nil && request.headerFields[.contentType] == nil {
+          request.headerFields[.contentType] = "application/json"
+        }
         let (data, response) = try await next(request, bodyData)
         logger.verbose(
           """
diff --git a/Sources/Helpers/HTTP/URLSession+HTTPRequest.swift b/Sources/Helpers/HTTP/URLSession+HTTPRequest.swift
new file mode 100644
index 00000000..daf775f9
--- /dev/null
+++ b/Sources/Helpers/HTTP/URLSession+HTTPRequest.swift
@@ -0,0 +1,113 @@
+import Foundation
+import HTTPTypes
+
+#if canImport(FoundationNetworking)
+import FoundationNetworking
+#endif
+
+#if !os(WASI)
+
+extension URLSessionTask {
+    /// The original HTTP request this task was created with.
+    public var originalHTTPRequest: HTTPRequest? {
+        self.originalRequest?.httpRequest
+    }
+
+    /// The current HTTP request -- may differ from the `originalHTTPRequest` due to HTTP redirection.
+    public var currentHTTPRequest: HTTPRequest? {
+        self.currentRequest?.httpRequest
+    }
+
+    /// The HTTP response received from the server.
+    public var httpResponse: HTTPResponse? {
+        (self.response as? HTTPURLResponse)?.httpResponse
+    }
+}
+
+private enum HTTPTypeConversionError: Error {
+    case failedToConvertHTTPRequestToURLRequest
+    case failedToConvertURLResponseToHTTPResponse
+}
+
+#endif
+
+#if canImport(FoundationNetworking) && compiler(<6)
+
+@available(macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0, *)
+extension URLSession {
+    /// Convenience method to load data using an `HTTPRequest`; creates and resumes a `URLSessionDataTask` internally.
+    ///
+    /// - Parameter request: The `HTTPRequest` for which to load data.
+    /// - Parameter delegate: Task-specific delegate.
+    /// - Returns: Data and response.
+    public func data(
+        for request: HTTPRequest,
+        delegate: (any URLSessionTaskDelegate)? = nil
+    ) async throws -> (Data, HTTPResponse) {
+        guard let urlRequest = URLRequest(httpRequest: request) else {
+            throw HTTPTypeConversionError.failedToConvertHTTPRequestToURLRequest
+        }
+        let (data, urlResponse) = try await self.data(for: urlRequest, delegate: delegate)
+        guard let response = (urlResponse as? HTTPURLResponse)?.httpResponse else {
+            throw HTTPTypeConversionError.failedToConvertURLResponseToHTTPResponse
+        }
+        return (data, response)
+    }
+
+    /// Convenience method to upload data using an `HTTPRequest`, creates and resumes a `URLSessionUploadTask` internally.
+    ///
+    /// - Parameter request: The `HTTPRequest` for which to upload data.
+    /// - Parameter bodyData: Data to upload.
+    /// - Parameter delegate: Task-specific delegate.
+    /// - Returns: Data and response.
+    public func upload(
+        for request: HTTPRequest,
+        from bodyData: Data,
+        delegate: (any URLSessionTaskDelegate)? = nil
+    ) async throws -> (Data, HTTPResponse) {
+        guard let urlRequest = URLRequest(httpRequest: request) else {
+            throw HTTPTypeConversionError.failedToConvertHTTPRequestToURLRequest
+        }
+        let (data, urlResponse) = try await self.upload(for: urlRequest, from: bodyData, delegate: delegate)
+        guard let response = (urlResponse as? HTTPURLResponse)?.httpResponse else {
+            throw HTTPTypeConversionError.failedToConvertURLResponseToHTTPResponse
+        }
+        return (data, response)
+    }
+}
+
+@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+extension URLSession {
+    /// Convenience method to load data using an `HTTPRequest`; creates and resumes a `URLSessionDataTask` internally.
+    ///
+    /// - Parameter request: The `HTTPRequest` for which to load data.
+    /// - Returns: Data and response.
+    public func data(for request: HTTPRequest) async throws -> (Data, HTTPResponse) {
+        guard let urlRequest = URLRequest(httpRequest: request) else {
+            throw HTTPTypeConversionError.failedToConvertHTTPRequestToURLRequest
+        }
+        let (data, urlResponse) = try await self.data(for: urlRequest)
+        guard let response = (urlResponse as? HTTPURLResponse)?.httpResponse else {
+            throw HTTPTypeConversionError.failedToConvertURLResponseToHTTPResponse
+        }
+        return (data, response)
+    }
+
+    /// Convenience method to upload data using an `HTTPRequest`, creates and resumes a `URLSessionUploadTask` internally.
+    ///
+    /// - Parameter request: The `HTTPRequest` for which to upload data.
+    /// - Parameter bodyData: Data to upload.
+    /// - Returns: Data and response.
+    public func upload(for request: HTTPRequest, from bodyData: Data) async throws -> (Data, HTTPResponse) {
+        guard let urlRequest = URLRequest(httpRequest: request) else {
+            throw HTTPTypeConversionError.failedToConvertHTTPRequestToURLRequest
+        }
+        let (data, urlResponse) = try await self.upload(for: urlRequest, from: bodyData)
+        guard let response = (urlResponse as? HTTPURLResponse)?.httpResponse else {
+            throw HTTPTypeConversionError.failedToConvertURLResponseToHTTPResponse
+        }
+        return (data, response)
+    }
+}
+
+#endif
diff --git a/Sources/PostgREST/PostgrestBuilder.swift b/Sources/PostgREST/PostgrestBuilder.swift
index 3726a97a..8eb1c411 100644
--- a/Sources/PostgREST/PostgrestBuilder.swift
+++ b/Sources/PostgREST/PostgrestBuilder.swift
@@ -102,7 +102,7 @@ public class PostgrestBuilder: @unchecked Sendable {
     options: FetchOptions,
     decode: (Data) throws -> T
   ) async throws -> PostgrestResponse<T> {
-    let request = mutableState.withValue {
+    let (request, bodyData) = mutableState.withValue {
       $0.fetchOptions = options
 
       if $0.fetchOptions.head {
@@ -130,10 +130,10 @@ public class PostgrestBuilder: @unchecked Sendable {
         }
       }
 
-      return $0.request
+      return ($0.request, $0.bodyData)
     }
 
-    let (data, response) = try await http.send(request, nil)
+    let (data, response) = try await http.send(request, bodyData)
 
     guard 200..<300 ~= response.status.code else {
       if let error = try? configuration.decoder.decode(PostgrestError.self, from: data) {
diff --git a/Sources/PostgREST/PostgrestClient.swift b/Sources/PostgREST/PostgrestClient.swift
index 701d07b8..2ba81f04 100644
--- a/Sources/PostgREST/PostgrestClient.swift
+++ b/Sources/PostgREST/PostgrestClient.swift
@@ -72,7 +72,7 @@ public final class PostgrestClient: Sendable {
   public init(configuration: Configuration) {
     _configuration = LockIsolated(configuration)
     _configuration.withValue {
-      $0.headers.merge(with: Configuration.defaultHeaders)
+      $0.headers.merge(Configuration.defaultHeaders) { l, _ in l }
     }
   }
 
diff --git a/Sources/Realtime/PhoenixTransport.swift b/Sources/Realtime/PhoenixTransport.swift
index 3c416f66..3daff5bc 100644
--- a/Sources/Realtime/PhoenixTransport.swift
+++ b/Sources/Realtime/PhoenixTransport.swift
@@ -201,7 +201,6 @@ open class URLSessionTransport: NSObject, PhoenixTransport, URLSessionWebSocketD
     var request = URLRequest(url: url)
 
     for (key, value) in headers {
-      guard let value = value as? String else { continue }
       request.addValue(value, forHTTPHeaderField: key)
     }
 
diff --git a/Sources/Storage/StorageApi.swift b/Sources/Storage/StorageApi.swift
index f22915a7..f2e040f8 100644
--- a/Sources/Storage/StorageApi.swift
+++ b/Sources/Storage/StorageApi.swift
@@ -35,7 +35,7 @@ public class StorageApi: @unchecked Sendable {
     from bodyData: Data?
   ) async throws -> (Data, HTTPResponse) {
     var request = request
-    request.headerFields = configuration.headers.merging(with: request.headerFields)
+    request.headerFields = configuration.headers.merging(request.headerFields) { $1 }
 
     let (data, response) = try await http.send(request, bodyData)
 
diff --git a/Sources/Storage/StorageFileApi.swift b/Sources/Storage/StorageFileApi.swift
index 82ac8126..91314746 100644
--- a/Sources/Storage/StorageFileApi.swift
+++ b/Sources/Storage/StorageFileApi.swift
@@ -80,7 +80,7 @@ public class StorageFileApi: StorageApi, @unchecked Sendable {
     options: FileOptions?
   ) async throws -> FileUploadResponse {
     let options = options ?? defaultFileOptions
-    var headers = options.headers.map { HTTPFields($0) } ?? HTTPFields()
+    var headers = options.headers ?? HTTPFields()
 
     if method == .post {
       headers[.xUpsert] = "\(options.upsert)"
@@ -647,7 +647,7 @@ public class StorageFileApi: StorageApi, @unchecked Sendable {
     options: FileOptions?
   ) async throws -> SignedURLUploadResponse {
     let options = options ?? defaultFileOptions
-    var headers = options.headers.map { HTTPFields($0) } ?? HTTPFields()
+    var headers = options.headers ?? HTTPFields()
 
     headers[.xUpsert] = "\(options.upsert)"
     headers[.duplex] = options.duplex
diff --git a/Sources/Supabase/SupabaseClient.swift b/Sources/Supabase/SupabaseClient.swift
index ff88ef9f..196e508e 100644
--- a/Sources/Supabase/SupabaseClient.swift
+++ b/Sources/Supabase/SupabaseClient.swift
@@ -47,7 +47,7 @@ public final class SupabaseClient: Sendable {
         $0.rest = PostgrestClient(
           url: databaseURL,
           schema: options.db.schema,
-          headers: _headers,
+          headers: headers,
           logger: options.global.logger,
           fetch: { request, bodyData in
             if let bodyData {
@@ -72,7 +72,7 @@ public final class SupabaseClient: Sendable {
         $0.storage = SupabaseStorageClient(
           configuration: StorageClientConfiguration(
             url: storageURL,
-            headers: _headers,
+            headers: headers,
             session: StorageHTTPSession { request, bodyData in
               if let bodyData {
                 return try await self.uploadWithAuth(for: request, from: bodyData)
@@ -100,7 +100,7 @@ public final class SupabaseClient: Sendable {
       if $0.functions == nil {
         $0.functions = FunctionsClient(
           url: functionsURL,
-          headers: _headers,
+          headers: headers,
           region: options.functions.region,
           logger: options.global.logger,
           fetch: { request, bodyData in
@@ -116,14 +116,11 @@ public final class SupabaseClient: Sendable {
       return $0.functions!
     }
   }
-
-  let _headers: HTTPFields
+	
   /// Headers provided to the inner clients on initialization.
   ///
   /// - Note: This collection is non-mutable, if you want to provide different headers, pass it in ``SupabaseClientOptions/GlobalOptions/headers``.
-  public var headers: [String: String] {
-    _headers.dictionary
-  }
+  public let headers: HTTPFields
 
   struct MutableState {
     var listenForAuthEventsTask: Task<Void, Never>?
@@ -177,14 +174,14 @@ public final class SupabaseClient: Sendable {
       .authorization: "Bearer \(supabaseKey)",
       .apiKey: supabaseKey,
     ]
-    _headers = headers.merging(with: options.global.headers)
+    self.headers = options.global.headers.merging(headers) { $1 }
 
     // default storage key uses the supabase project ref as a namespace
     let defaultStorageKey = "sb-\(supabaseURL.host!.split(separator: ".")[0])-auth-token"
 
     _auth = AuthClient(
       url: supabaseURL.appendingPathComponent("/auth/v1"),
-      headers: _headers,
+	  headers: self.headers,
       flowType: options.auth.flowType,
       redirectToURL: options.auth.redirectToURL,
       storageKey: options.auth.storageKey ?? defaultStorageKey,
@@ -206,13 +203,13 @@ public final class SupabaseClient: Sendable {
     _realtime = UncheckedSendable(
       RealtimeClient(
         supabaseURL.appendingPathComponent("/realtime/v1").absoluteString,
-        headers: _headers,
-        params: _headers.dictionary
+        headers: headers,
+        params: headers.dictionary
       )
     )
 
     var realtimeOptions = options.realtime
-    realtimeOptions.headers.merge(with: _headers)
+    realtimeOptions.headers.merge(self.headers)  { $1 }
     if realtimeOptions.logger == nil {
       realtimeOptions.logger = options.global.logger
     }
diff --git a/Sources/TestHelpers/HTTPClientMock.swift b/Sources/TestHelpers/HTTPClientMock.swift
index 3de790de..aa09ecc9 100644
--- a/Sources/TestHelpers/HTTPClientMock.swift
+++ b/Sources/TestHelpers/HTTPClientMock.swift
@@ -9,14 +9,16 @@ import ConcurrencyExtras
 import Foundation
 import Helpers
 import XCTestDynamicOverlay
+import HTTPTypes
 
 package actor HTTPClientMock: HTTPClientType {
+  
   package struct MockNotFound: Error {}
 
-  private var mocks = [@Sendable (HTTPRequest) async throws -> HTTPResponse?]()
+  private var mocks = [@Sendable (HTTPRequest, Data?) async throws -> (Data, HTTPResponse)?]()
 
   /// Requests received by this client in order.
-  package var receivedRequests: [HTTPRequest] = []
+  package var receivedRequests: [(HTTPRequest, Data?)] = []
 
   /// Responses returned by this client in order.
   package var returnedResponses: [Result<HTTPResponse, any Error>] = []
@@ -25,12 +27,12 @@ package actor HTTPClientMock: HTTPClientType {
 
   @discardableResult
   package func when(
-    _ request: @escaping @Sendable (HTTPRequest) -> Bool,
-    return response: @escaping @Sendable (HTTPRequest) async throws -> HTTPResponse
+    _ request: @escaping @Sendable (HTTPRequest, Data?) -> Bool,
+    return response: @escaping @Sendable (HTTPRequest, Data?) async throws -> (Data, HTTPResponse)
   ) -> Self {
-    mocks.append { r in
-      if request(r) {
-        return try await response(r)
+    mocks.append { r, b in
+      if request(r, b) {
+        return try await response(r, b)
       }
       return nil
     }
@@ -39,19 +41,19 @@ package actor HTTPClientMock: HTTPClientType {
 
   @discardableResult
   package func any(
-    _ response: @escaping @Sendable (HTTPRequest) async throws -> HTTPResponse
+    _ response: @escaping @Sendable (HTTPRequest, Data?) async throws -> (Data, HTTPResponse)
   ) -> Self {
-    when({ _ in true }, return: response)
+    when({ _, _ in true }, return: response)
   }
 
-  package func send(_ request: HTTPRequest) async throws -> HTTPResponse {
-    receivedRequests.append(request)
+  package func send(_ request: HTTPRequest, _ bodyData: Data?) async throws -> (Data, HTTPResponse) {
+    receivedRequests.append((request, bodyData))
 
     for mock in mocks {
       do {
-        if let response = try await mock(request) {
+        if let (data, response) = try await mock(request, bodyData) {
           returnedResponses.append(.success(response))
-          return response
+          return (data, response)
         }
       } catch {
         returnedResponses.append(.failure(error))
diff --git a/Tests/AuthTests/AuthClientMultipleInstancesTests.swift b/Tests/AuthTests/AuthClientMultipleInstancesTests.swift
index 26998388..fe4c3231 100644
--- a/Tests/AuthTests/AuthClientMultipleInstancesTests.swift
+++ b/Tests/AuthTests/AuthClientMultipleInstancesTests.swift
@@ -5,10 +5,11 @@
 //  Created by Guilherme Souza on 05/07/24.
 //
 
-@testable import Auth
 import TestHelpers
 import XCTest
 
+@testable import Auth
+
 final class AuthClientMultipleInstancesTests: XCTestCase {
   func testMultipleAuthClientInstances() {
     let url = URL(string: "http://localhost:54321/auth")!
diff --git a/Tests/AuthTests/AuthClientTests.swift b/Tests/AuthTests/AuthClientTests.swift
index 17905696..9c4fd989 100644
--- a/Tests/AuthTests/AuthClientTests.swift
+++ b/Tests/AuthTests/AuthClientTests.swift
@@ -7,6 +7,7 @@
 
 import ConcurrencyExtras
 import CustomDump
+import HTTPTypes
 import InlineSnapshotTesting
 import TestHelpers
 import XCTest
@@ -80,8 +81,8 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testSignOut() async throws {
-    sut = makeSUT { _ in
-      .stub()
+    sut = makeSUT { _, _ in
+      TestStub.stub()
     }
 
     Dependencies[sut.clientID].sessionStorage.store(.validSession)
@@ -109,8 +110,8 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testSignOutWithOthersScopeShouldNotRemoveLocalSession() async throws {
-    sut = makeSUT { _ in
-      .stub()
+    sut = makeSUT { _, _ in
+      TestStub.stub()
     }
 
     Dependencies[sut.clientID].sessionStorage.store(.validSession)
@@ -122,14 +123,12 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testSignOutShouldRemoveSessionIfUserIsNotFound() async throws {
-    sut = makeSUT { _ in
+    sut = makeSUT { _, _ in
       throw AuthError.api(
         message: "",
         errorCode: .unknown,
-        underlyingData: Data(),
-        underlyingResponse: HTTPURLResponse(
-          url: URL(string: "http://localhost")!, statusCode: 404, httpVersion: nil,
-          headerFields: nil)!
+        data: Data(),
+        response: HTTPResponse(status: .init(code: 404))
       )
     }
 
@@ -155,14 +154,12 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testSignOutShouldRemoveSessionIfJWTIsInvalid() async throws {
-    sut = makeSUT { _ in
+    sut = makeSUT { _, _ in
       throw AuthError.api(
         message: "",
         errorCode: .invalidCredentials,
-        underlyingData: Data(),
-        underlyingResponse: HTTPURLResponse(
-          url: URL(string: "http://localhost")!, statusCode: 401, httpVersion: nil,
-          headerFields: nil)!
+        data: Data(),
+        response: HTTPResponse(status: .init(code: 401))
       )
     }
 
@@ -188,14 +185,12 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testSignOutShouldRemoveSessionIf403Returned() async throws {
-    sut = makeSUT { _ in
+    sut = makeSUT { _, _ in
       throw AuthError.api(
         message: "",
         errorCode: .invalidCredentials,
-        underlyingData: Data(),
-        underlyingResponse: HTTPURLResponse(
-          url: URL(string: "http://localhost")!, statusCode: 403, httpVersion: nil,
-          headerFields: nil)!
+        data: Data(),
+        response: HTTPResponse(status: .init(code: 403))
       )
     }
 
@@ -223,8 +218,8 @@ final class AuthClientTests: XCTestCase {
   func testSignInAnonymously() async throws {
     let session = Session(fromMockNamed: "anonymous-sign-in-response")
 
-    let sut = makeSUT { _ in
-      .stub(fromFileName: "anonymous-sign-in-response")
+    let sut = makeSUT { _, _ in
+      TestStub.stub(fromFileName: "anonymous-sign-in-response")
     }
 
     let eventsTask = Task {
@@ -243,8 +238,8 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testSignInWithOAuth() async throws {
-    let sut = makeSUT { _ in
-      .stub(fromFileName: "session")
+    let sut = makeSUT { _, _ in
+      TestStub.stub(fromFileName: "session")
     }
 
     let eventsTask = Task {
@@ -266,8 +261,8 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testGetLinkIdentityURL() async throws {
-    let sut = makeSUT { _ in
-      .stub(
+    let sut = makeSUT { _, _ in
+      TestStub.stub(
         """
         {
           "url" : "https://github.com/login/oauth/authorize?client_id=1234&redirect_to=com.supabase.swift-examples://&redirect_uri=http://127.0.0.1:54321/auth/v1/callback&response_type=code&scope=user:email&skip_http_redirect=true&state=jwt"
@@ -295,8 +290,8 @@ final class AuthClientTests: XCTestCase {
   func testLinkIdentity() async throws {
     let url =
       "https://github.com/login/oauth/authorize?client_id=1234&redirect_to=com.supabase.swift-examples://&redirect_uri=http://127.0.0.1:54321/auth/v1/callback&response_type=code&scope=user:email&skip_http_redirect=true&state=jwt"
-    let sut = makeSUT { _ in
-      .stub(
+    let sut = makeSUT { _, _ in
+      TestStub.stub(
         """
         {
           "url" : "\(url)"
@@ -318,12 +313,12 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testAdminListUsers() async throws {
-    let sut = makeSUT { _ in
-      .stub(
+    let sut = makeSUT { _, _ in
+      TestStub.stub(
         fromFileName: "list-users-response",
         headers: [
-          "X-Total-Count": "669",
-          "Link":
+          .xTotalCount: "669",
+          .link:
             "</admin/users?page=2&per_page=>; rel=\"next\", </admin/users?page=14&per_page=>; rel=\"last\"",
         ]
       )
@@ -336,12 +331,12 @@ final class AuthClientTests: XCTestCase {
   }
 
   func testAdminListUsers_noNextPage() async throws {
-    let sut = makeSUT { _ in
-      .stub(
+    let sut = makeSUT { _, _ in
+      TestStub.stub(
         fromFileName: "list-users-response",
         headers: [
-          "X-Total-Count": "669",
-          "Link": "</admin/users?page=14&per_page=>; rel=\"last\"",
+          .xTotalCount: "669",
+          .link: "</admin/users?page=14&per_page=>; rel=\"last\"",
         ]
       )
     }
@@ -378,20 +373,20 @@ final class AuthClientTests: XCTestCase {
   }
 
   private func makeSUT(
-    fetch: ((URLRequest) async throws -> HTTPResponse)? = nil
+    fetch: ((HTTPRequest, Data?) async throws -> (Data, HTTPResponse))? = nil
   ) -> AuthClient {
     let configuration = AuthClient.Configuration(
       url: clientURL,
-      headers: ["Apikey": "dummy.api.key"],
+      headers: [.apiKey: "dummy.api.key"],
       localStorage: storage,
       logger: nil,
-      fetch: { request in
+      fetch: { request, body in
         guard let fetch else {
           throw UnimplementedError()
         }
 
-        let response = try await fetch(request)
-        return (response.data, response.underlyingResponse)
+        let (data, response) = try await fetch(request, body)
+        return (data, response)
       }
     )
 
@@ -401,52 +396,47 @@ final class AuthClientTests: XCTestCase {
   }
 }
 
-extension HTTPResponse {
+struct TestStub {
   static func stub(
     _ body: String = "",
     code: Int = 200,
-    headers: [String: String]? = nil
-  ) -> HTTPResponse {
-    HTTPResponse(
-      data: body.data(using: .utf8)!,
-      response: HTTPURLResponse(
-        url: clientURL,
-        statusCode: code,
-        httpVersion: nil,
+    headers: HTTPFields = [:]
+  ) -> (Data, HTTPResponse) {
+    (
+      Data(body.utf8),
+      HTTPResponse(
+        status: .init(code: code),
         headerFields: headers
-      )!
+      )
     )
   }
 
   static func stub(
     fromFileName fileName: String,
     code: Int = 200,
-    headers: [String: String]? = nil
-  ) -> HTTPResponse {
-    HTTPResponse(
-      data: json(named: fileName),
-      response: HTTPURLResponse(
-        url: clientURL,
-        statusCode: code,
-        httpVersion: nil,
+    headers: HTTPFields = [:]
+  ) -> (Data, HTTPResponse) {
+    (
+      json(named: fileName),
+      HTTPResponse(
+        status: .init(code: code),
         headerFields: headers
-      )!
+      )
     )
   }
 
   static func stub(
     _ value: some Encodable,
     code: Int = 200,
-    headers: [String: String]? = nil
-  ) -> HTTPResponse {
-    HTTPResponse(
-      data: try! AuthClient.Configuration.jsonEncoder.encode(value),
-      response: HTTPURLResponse(
-        url: clientURL,
-        statusCode: code,
-        httpVersion: nil,
+    headers: HTTPFields = [:]
+  ) -> (Data, HTTPResponse) {
+    (
+      try! AuthClient.Configuration.jsonEncoder.encode(value),
+      HTTPResponse(
+        status: .init(code: code),
         headerFields: headers
-      )!
+      )
     )
+
   }
 }
diff --git a/Tests/AuthTests/AuthErrorTests.swift b/Tests/AuthTests/AuthErrorTests.swift
index 66695263..782de4d4 100644
--- a/Tests/AuthTests/AuthErrorTests.swift
+++ b/Tests/AuthTests/AuthErrorTests.swift
@@ -5,9 +5,11 @@
 //  Created by Guilherme Souza on 29/08/24.
 //
 
-@testable import Auth
+import HTTPTypes
 import XCTest
 
+@testable import Auth
+
 #if canImport(FoundationNetworking)
   import FoundationNetworking
 #endif
@@ -25,13 +27,17 @@ final class AuthErrorTests: XCTestCase {
     let api = AuthError.api(
       message: "API Error",
       errorCode: .emailConflictIdentityNotDeletable,
-      underlyingData: Data(),
-      underlyingResponse: HTTPURLResponse(url: URL(string: "http://localhost")!, statusCode: 400, httpVersion: nil, headerFields: nil)!
+      data: Data(),
+      response: HTTPResponse(status: .init(code: 400))
     )
     XCTAssertEqual(api.errorCode, .emailConflictIdentityNotDeletable)
     XCTAssertEqual(api.message, "API Error")
 
-    let pkceGrantCodeExchange = AuthError.pkceGrantCodeExchange(message: "PKCE failure", error: nil, code: nil)
+    let pkceGrantCodeExchange = AuthError.pkceGrantCodeExchange(
+      message: "PKCE failure",
+      error: nil,
+      code: nil
+    )
     XCTAssertEqual(pkceGrantCodeExchange.errorCode, .unknown)
     XCTAssertEqual(pkceGrantCodeExchange.message, "PKCE failure")
 
diff --git a/Tests/AuthTests/ExtractParamsTests.swift b/Tests/AuthTests/ExtractParamsTests.swift
index 4ced833e..daacb291 100644
--- a/Tests/AuthTests/ExtractParamsTests.swift
+++ b/Tests/AuthTests/ExtractParamsTests.swift
@@ -5,9 +5,10 @@
 //  Created by Guilherme Souza on 23/12/23.
 //
 
-@testable import Auth
 import XCTest
 
+@testable import Auth
+
 final class ExtractParamsTests: XCTestCase {
   func testExtractParamsInQuery() {
     let code = UUID().uuidString
diff --git a/Tests/AuthTests/RequestsTests.swift b/Tests/AuthTests/RequestsTests.swift
index a2b36c79..da3e66d0 100644
--- a/Tests/AuthTests/RequestsTests.swift
+++ b/Tests/AuthTests/RequestsTests.swift
@@ -5,13 +5,15 @@
 //  Created by Guilherme Souza on 07/10/23.
 //
 
-@testable import Auth
+import HTTPTypes
 import Helpers
 import InlineSnapshotTesting
 import SnapshotTesting
 import TestHelpers
 import XCTest
 
+@testable import Auth
+
 #if canImport(FoundationNetworking)
   import FoundationNetworking
 #endif
@@ -140,10 +142,10 @@ final class RequestsTests: XCTestCase {
 
   #if !os(Linux) && !os(Windows)
     func testSessionFromURL() async throws {
-      let sut = makeSUT(fetch: { request in
-        let authorizationHeader = request.allHTTPHeaderFields?["Authorization"]
+      let sut = makeSUT(fetch: { request, bodyData in
+        let authorizationHeader = request.headerFields[.authorization]
         XCTAssertEqual(authorizationHeader, "bearer accesstoken")
-        return (json(named: "user"), HTTPURLResponse.stub())
+        return (json(named: "user"), HTTPResponse(status: .ok))
       })
 
       let currentDate = Date()
@@ -430,7 +432,12 @@ final class RequestsTests: XCTestCase {
     Dependencies[sut.clientID].sessionStorage.store(.validSession)
 
     await assert {
-      _ = try await sut.mfa.enroll(params: MFAEnrollParams(issuer: "supabase.com", friendlyName: "test"))
+      _ = try await sut.mfa.enroll(
+        params: MFAEnrollParams(
+          issuer: "supabase.com",
+          friendlyName: "test"
+        )
+      )
     }
   }
 
@@ -480,7 +487,13 @@ final class RequestsTests: XCTestCase {
     Dependencies[sut.clientID].sessionStorage.store(.validSession)
 
     await assert {
-      _ = try await sut.mfa.verify(params: .init(factorId: "123", challengeId: "123", code: "123456"))
+      _ = try await sut.mfa.verify(
+        params: .init(
+          factorId: "123",
+          challengeId: "123",
+          code: "123456"
+        )
+      )
     }
   }
 
@@ -516,20 +529,22 @@ final class RequestsTests: XCTestCase {
 
     let configuration = AuthClient.Configuration(
       url: clientURL,
-      headers: ["Apikey": "dummy.api.key", "X-Client-Info": "gotrue-swift/x.y.z"],
+      headers: [.apiKey: "dummy.api.key", .xClientInfo: "gotrue-swift/x.y.z"],
       flowType: flowType,
       localStorage: InMemoryLocalStorage(),
       logger: nil,
       encoder: encoder,
-      fetch: { request in
+      fetch: { request, bodyData in
         DispatchQueue.main.sync {
+          var request = URLRequest(httpRequest: request)!
+          request.httpBody = bodyData
           assertSnapshot(
             of: request, as: .curl, record: record, file: file, testName: testName, line: line
           )
         }
 
         if let fetch {
-          return try await fetch(request)
+          return try await fetch(request, bodyData)
         }
 
         throw UnimplementedError()
@@ -539,14 +554,3 @@ final class RequestsTests: XCTestCase {
     return AuthClient(configuration: configuration)
   }
 }
-
-extension HTTPURLResponse {
-  fileprivate static func stub(code: Int = 200) -> HTTPURLResponse {
-    HTTPURLResponse(
-      url: clientURL,
-      statusCode: code,
-      httpVersion: nil,
-      headerFields: nil
-    )!
-  }
-}
diff --git a/Tests/AuthTests/SessionManagerTests.swift b/Tests/AuthTests/SessionManagerTests.swift
index 3d866055..36c6cb3b 100644
--- a/Tests/AuthTests/SessionManagerTests.swift
+++ b/Tests/AuthTests/SessionManagerTests.swift
@@ -82,11 +82,13 @@ final class SessionManagerTests: XCTestCase {
     let (refreshSessionStream, refreshSessionContinuation) = AsyncStream<Session>.makeStream()
 
     await http.when(
-      { $0.url.path.contains("/token") },
-      return: { _ in
+      { request, bodyData in
+        request.url!.path.contains("/token")
+      },
+      return: { _, _ in
         refreshSessionCallCount.withValue { $0 += 1 }
         let session = await refreshSessionStream.first(where: { _ in true })!
-        return .stub(session)
+        return TestStub.stub(session)
       }
     )
 
diff --git a/Tests/AuthTests/StoredSessionTests.swift b/Tests/AuthTests/StoredSessionTests.swift
index 9e466ec2..47a3592d 100644
--- a/Tests/AuthTests/StoredSessionTests.swift
+++ b/Tests/AuthTests/StoredSessionTests.swift
@@ -1,9 +1,10 @@
-@testable import Auth
 import ConcurrencyExtras
 import SnapshotTesting
 import TestHelpers
 import XCTest
 
+@testable import Auth
+
 final class StoredSessionTests: XCTestCase {
   let clientID = AuthClientID()
 
@@ -37,11 +38,11 @@ final class StoredSessionTests: XCTestCase {
         appMetadata: [
           "provider": "email",
           "providers": [
-            "email",
+            "email"
           ],
         ],
         userMetadata: [
-          "referrer_id": nil,
+          "referrer_id": nil
         ],
         aud: "authenticated",
         confirmationSentAt: ISO8601DateFormatter().date(from: "2022-04-09T11:57:01Z")!,
@@ -65,13 +66,13 @@ final class StoredSessionTests: XCTestCase {
             identityId: UUID(uuidString: "859F402D-B3DE-4105-A1B9-932836D9193B")!,
             userId: UUID(uuidString: "859F402D-B3DE-4105-A1B9-932836D9193B")!,
             identityData: [
-              "sub": "859f402d-b3de-4105-a1b9-932836d9193b",
+              "sub": "859f402d-b3de-4105-a1b9-932836d9193b"
             ],
             provider: "email",
             createdAt: ISO8601DateFormatter().date(from: "2022-04-09T11:57:01Z")!,
             lastSignInAt: ISO8601DateFormatter().date(from: "2022-04-09T11:57:01Z")!,
             updatedAt: ISO8601DateFormatter().date(from: "2022-04-09T11:57:01Z")!
-          ),
+          )
         ],
         factors: nil
       )
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testDeleteUser.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testDeleteUser.1.txt
index 2e6dd0e4..650a5fa9 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testDeleteUser.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testDeleteUser.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request DELETE \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"should_soft_delete\":false}" \
 	"http://localhost:54321/auth/v1/admin/users/E621E1F8-C36C-495A-93FC-0C247A3E6E5F"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testGetLinkIdentityURL.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testGetLinkIdentityURL.1.txt
index 44ad6259..80a2c5d3 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testGetLinkIdentityURL.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testGetLinkIdentityURL.1.txt
@@ -1,6 +1,6 @@
 curl \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/user/identities/authorize?extra_key=extra_value&provider=github&redirect_to=https://supabase.com&scopes=user:email&skip_http_redirect=true"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallenge.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallenge.1.txt
index e0263d44..64fa5cc1 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallenge.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallenge.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/factors/123/challenge"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallengePhone.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallengePhone.1.txt
index 296f1940..12fbbfbd 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallengePhone.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAChallengePhone.1.txt
@@ -1,9 +1,9 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"channel\":\"whatsapp\"}" \
 	"http://localhost:54321/auth/v1/factors/123/challenge"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollLegacy.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollLegacy.1.txt
index 51778779..52c874b2 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollLegacy.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollLegacy.1.txt
@@ -1,9 +1,9 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"factor_type\":\"totp\",\"friendly_name\":\"test\",\"issuer\":\"supabase.com\"}" \
 	"http://localhost:54321/auth/v1/factors"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollPhone.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollPhone.1.txt
index 5ae9482b..0b311c6b 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollPhone.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollPhone.1.txt
@@ -1,9 +1,9 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"factor_type\":\"phone\",\"friendly_name\":\"test\",\"phone\":\"+1 202-918-2132\"}" \
 	"http://localhost:54321/auth/v1/factors"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollTotp.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollTotp.1.txt
index 51778779..52c874b2 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollTotp.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAEnrollTotp.1.txt
@@ -1,9 +1,9 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"factor_type\":\"totp\",\"friendly_name\":\"test\",\"issuer\":\"supabase.com\"}" \
 	"http://localhost:54321/auth/v1/factors"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAUnenroll.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAUnenroll.1.txt
index 75c28574..6b0764cc 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAUnenroll.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAUnenroll.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request DELETE \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/factors/123"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAVerify.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAVerify.1.txt
index b336ccaf..e08455b4 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAVerify.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testMFAVerify.1.txt
@@ -1,9 +1,9 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"challenge_id\":\"123\",\"code\":\"123456\",\"factor_id\":\"123\"}" \
 	"http://localhost:54321/auth/v1/factors/123/verify"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testReauthenticate.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testReauthenticate.1.txt
index d132361a..c03004a7 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testReauthenticate.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testReauthenticate.1.txt
@@ -1,6 +1,6 @@
 curl \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/reauthenticate"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testRefreshSession.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testRefreshSession.1.txt
index 69f5f61c..383a9e5a 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testRefreshSession.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testRefreshSession.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"refresh_token\":\"refresh-token\"}" \
 	"http://localhost:54321/auth/v1/token?grant_type=refresh_token"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testResendEmail.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testResendEmail.1.txt
index 8f195886..5ece3cce 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testResendEmail.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testResendEmail.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"email\":\"example@mail.com\",\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"type\":\"email_change\"}" \
 	"http://localhost:54321/auth/v1/resend?redirect_to=https://supabase.com"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testResendPhone.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testResendPhone.1.txt
index 16f203b3..5e2c9c47 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testResendPhone.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testResendPhone.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"phone\":\"+1 202-918-2132\",\"type\":\"phone_change\"}" \
 	"http://localhost:54321/auth/v1/resend"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testResetPasswordForEmail.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testResetPasswordForEmail.1.txt
index c77f72d0..6d9ae8a6 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testResetPasswordForEmail.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testResetPasswordForEmail.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"email\":\"example@mail.com\",\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"}}" \
 	"http://localhost:54321/auth/v1/recover?redirect_to=https://supabase.com"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSessionFromURL.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSessionFromURL.1.txt
index ca2aed24..a38ebb8a 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSessionFromURL.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSessionFromURL.1.txt
@@ -1,6 +1,6 @@
 curl \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/user"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAExpiredToken.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAExpiredToken.1.txt
index 70612d26..81ad7be9 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAExpiredToken.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAExpiredToken.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"refresh_token\":\"dummy-refresh-token\"}" \
 	"http://localhost:54321/auth/v1/token?grant_type=refresh_token"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAFutureExpirationDate.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAFutureExpirationDate.1.txt
index d8d24073..0532048c 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAFutureExpirationDate.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSetSessionWithAFutureExpirationDate.1.txt
@@ -1,6 +1,6 @@
 curl \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJhdXRoZW50aWNhdGVkIiwiZXhwIjo0ODUyMTYzNTkzLCJzdWIiOiJmMzNkM2VjOS1hMmVlLTQ3YzQtODBlMS01YmQ5MTlmM2Q4YjgiLCJlbWFpbCI6ImhpQGJpbmFyeXNjcmFwaW5nLmNvIiwicGhvbmUiOiIiLCJhcHBfbWV0YWRhdGEiOnsicHJvdmlkZXIiOiJlbWFpbCIsInByb3ZpZGVycyI6WyJlbWFpbCJdfSwidXNlcl9tZXRhZGF0YSI6e30sInJvbGUiOiJhdXRoZW50aWNhdGVkIn0.UiEhoahP9GNrBKw_OHBWyqYudtoIlZGkrjs7Qa8hU7I" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/user"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInAnonymously.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInAnonymously.1.txt
index 5fa3cf34..782dea84 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInAnonymously.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInAnonymously.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"data\":{\"custom_key\":\"custom_value\"},\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"}}" \
 	"http://localhost:54321/auth/v1/signup"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithEmailAndPassword.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithEmailAndPassword.1.txt
index df2dfbbf..41ba1e1c 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithEmailAndPassword.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithEmailAndPassword.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"email\":\"example@mail.com\",\"gotrue_meta_security\":{\"captcha_token\":\"dummy-captcha\"},\"password\":\"the.pass\"}" \
 	"http://localhost:54321/auth/v1/token?grant_type=password"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithIdToken.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithIdToken.1.txt
index 37477c44..af1c88b7 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithIdToken.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithIdToken.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"access_token\":\"access-token\",\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"id_token\":\"id-token\",\"nonce\":\"nonce\",\"provider\":\"apple\"}" \
 	"http://localhost:54321/auth/v1/token?grant_type=id_token"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingEmail.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingEmail.1.txt
index 19c1ceba..727004e6 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingEmail.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingEmail.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"create_user\":true,\"data\":{\"custom_key\":\"custom_value\"},\"email\":\"example@mail.com\",\"gotrue_meta_security\":{\"captcha_token\":\"dummy-captcha\"}}" \
 	"http://localhost:54321/auth/v1/otp?redirect_to=https://supabase.com"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingPhone.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingPhone.1.txt
index 512cbccc..b34950d9 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingPhone.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithOTPUsingPhone.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"channel\":\"sms\",\"create_user\":true,\"data\":{\"custom_key\":\"custom_value\"},\"gotrue_meta_security\":{\"captcha_token\":\"dummy-captcha\"},\"phone\":\"+1 202-918-2132\"}" \
 	"http://localhost:54321/auth/v1/otp"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithPhoneAndPassword.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithPhoneAndPassword.1.txt
index c29e1e69..cb7a24ff 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithPhoneAndPassword.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithPhoneAndPassword.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"gotrue_meta_security\":{\"captcha_token\":\"dummy-captcha\"},\"password\":\"the.pass\",\"phone\":\"+1 202-918-2132\"}" \
 	"http://localhost:54321/auth/v1/token?grant_type=password"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingDomain.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingDomain.1.txt
index 1726c3ce..711b550d 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingDomain.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingDomain.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"domain\":\"supabase.com\",\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"redirect_to\":\"https:\/\/supabase.com\"}" \
 	"http://localhost:54321/auth/v1/sso"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingProviderId.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingProviderId.1.txt
index 8674ed09..5b16b3bf 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingProviderId.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignInWithSSOUsingProviderId.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"provider_id\":\"E621E1F8-C36C-495A-93FC-0C247A3E6E5F\",\"redirect_to\":\"https:\/\/supabase.com\"}" \
 	"http://localhost:54321/auth/v1/sso"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOut.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOut.1.txt
index 1868f0c5..69649604 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOut.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOut.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/logout?scope=global"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithLocalScope.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithLocalScope.1.txt
index 151ef1ce..3cedf642 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithLocalScope.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithLocalScope.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/logout?scope=local"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithOthersScope.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithOthersScope.1.txt
index 44cf10c9..ad5d0597 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithOthersScope.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignOutWithOthersScope.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/logout?scope=others"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithEmailAndPassword.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithEmailAndPassword.1.txt
index 1f3cf59e..dd8ed048 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithEmailAndPassword.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithEmailAndPassword.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"data\":{\"custom_key\":\"custom_value\"},\"email\":\"example@mail.com\",\"gotrue_meta_security\":{\"captcha_token\":\"dummy-captcha\"},\"password\":\"the.pass\"}" \
 	"http://localhost:54321/auth/v1/signup?redirect_to=https://supabase.com"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithPhoneAndPassword.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithPhoneAndPassword.1.txt
index 7bcbc227..d57109d2 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithPhoneAndPassword.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testSignUpWithPhoneAndPassword.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"data\":{\"custom_key\":\"custom_value\"},\"gotrue_meta_security\":{\"captcha_token\":\"dummy-captcha\"},\"password\":\"the.pass\",\"phone\":\"+1 202-918-2132\"}" \
 	"http://localhost:54321/auth/v1/signup"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testUnlinkIdentity.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testUnlinkIdentity.1.txt
index cc81e321..cf6f4001 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testUnlinkIdentity.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testUnlinkIdentity.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request DELETE \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	"http://localhost:54321/auth/v1/user/identities/E621E1F8-C36C-495A-93FC-0C247A3E6E5F"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testUpdateUser.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testUpdateUser.1.txt
index 45eaa5f0..5e61a0d9 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testUpdateUser.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testUpdateUser.1.txt
@@ -1,9 +1,9 @@
 curl \
 	--request PUT \
-	--header "Apikey: dummy.api.key" \
 	--header "Authorization: Bearer accesstoken" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"data\":{\"custom_key\":\"custom_value\"},\"email\":\"example@mail.com\",\"email_change_token\":\"123456\",\"nonce\":\"abcdef\",\"password\":\"another.pass\",\"phone\":\"+1 202-918-2132\"}" \
 	"http://localhost:54321/auth/v1/user"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingEmail.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingEmail.1.txt
index 885935d6..09aa49f4 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingEmail.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingEmail.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"email\":\"example@mail.com\",\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"token\":\"123456\",\"type\":\"magiclink\"}" \
 	"http://localhost:54321/auth/v1/verify?redirect_to=https://supabase.com"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingPhone.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingPhone.1.txt
index 38304842..afaa5d9f 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingPhone.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingPhone.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"gotrue_meta_security\":{\"captcha_token\":\"captcha-token\"},\"phone\":\"+1 202-918-2132\",\"token\":\"123456\",\"type\":\"sms\"}" \
 	"http://localhost:54321/auth/v1/verify"
\ No newline at end of file
diff --git a/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingTokenHash.1.txt b/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingTokenHash.1.txt
index 2488d0c2..892d2f81 100644
--- a/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingTokenHash.1.txt
+++ b/Tests/AuthTests/__Snapshots__/RequestsTests/testVerifyOTPUsingTokenHash.1.txt
@@ -1,8 +1,8 @@
 curl \
 	--request POST \
-	--header "Apikey: dummy.api.key" \
 	--header "Content-Type: application/json" \
 	--header "X-Client-Info: gotrue-swift/x.y.z" \
 	--header "X-Supabase-Api-Version: 2024-01-01" \
+	--header "apiKey: dummy.api.key" \
 	--data "{\"token_hash\":\"abc-def\",\"type\":\"email\"}" \
 	"http://localhost:54321/auth/v1/verify"
\ No newline at end of file
diff --git a/Tests/FunctionsTests/FunctionInvokeOptionsTests.swift b/Tests/FunctionsTests/FunctionInvokeOptionsTests.swift
index 4a781007..ed9ffba5 100644
--- a/Tests/FunctionsTests/FunctionInvokeOptionsTests.swift
+++ b/Tests/FunctionsTests/FunctionInvokeOptionsTests.swift
@@ -28,8 +28,8 @@ final class FunctionInvokeOptionsTests: XCTestCase {
     let boundary = "Boundary-\(UUID().uuidString)"
     let contentType = "multipart/form-data; boundary=\(boundary)"
     let options = FunctionInvokeOptions(
-      headers: ["Content-Type": contentType],
-      body: "binary value".data(using: .utf8)!
+      headers: [.contentType: contentType],
+      body: Data("binary value".utf8)
     )
     XCTAssertEqual(options.headers[.contentType], contentType)
     XCTAssertNotNil(options.body)
diff --git a/Tests/FunctionsTests/FunctionsClientTests.swift b/Tests/FunctionsTests/FunctionsClientTests.swift
index e4972dce..38b29745 100644
--- a/Tests/FunctionsTests/FunctionsClientTests.swift
+++ b/Tests/FunctionsTests/FunctionsClientTests.swift
@@ -1,10 +1,11 @@
 import ConcurrencyExtras
-@testable import Functions
-import Helpers
 import HTTPTypes
+import Helpers
 import TestHelpers
 import XCTest
 
+@testable import Functions
+
 #if canImport(FoundationNetworking)
   import FoundationNetworking
 #endif
@@ -13,32 +14,32 @@ final class FunctionsClientTests: XCTestCase {
   let url = URL(string: "http://localhost:5432/functions/v1")!
   let apiKey = "supabase.anon.key"
 
-  lazy var sut = FunctionsClient(url: url, headers: ["Apikey": apiKey])
+  lazy var sut = FunctionsClient(url: url, headers: [.apiKey: apiKey])
 
   func testInit() async {
     let client = FunctionsClient(
       url: url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: .saEast1
     )
     XCTAssertEqual(client.region, "sa-east-1")
 
-    XCTAssertEqual(client.headers[.init("Apikey")!], apiKey)
-    XCTAssertNotNil(client.headers[.init("X-Client-Info")!])
+    XCTAssertEqual(client.headers[.apiKey], apiKey)
+    XCTAssertNotNil(client.headers[.xClientInfo])
   }
 
   func testInvoke() async throws {
     let url = URL(string: "http://localhost:5432/functions/v1/hello_world")!
 
     let http = await HTTPClientMock()
-      .when {
-        $0.url.pathComponents.contains("hello_world")
-      } return: { _ in
-        try .stub(body: Empty())
+      .when { request, bodyData in
+        return request.url!.pathComponents.contains("hello_world")
+      } return: { _, _ in
+        try TestStub.stub(body: Empty())
       }
     let sut = FunctionsClient(
       url: self.url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: nil,
       http: http
     )
@@ -47,24 +48,24 @@ final class FunctionsClientTests: XCTestCase {
 
     try await sut.invoke(
       "hello_world",
-      options: .init(headers: ["X-Custom-Key": "value"], body: body)
+      options: .init(headers: [.init("X-Custom-Key")!: "value"], body: body)
     )
 
     let request = await http.receivedRequests.last
 
-    XCTAssertEqual(request?.url, url)
-    XCTAssertEqual(request?.method, .post)
-    XCTAssertEqual(request?.headers[.init("Apikey")!], apiKey)
-    XCTAssertEqual(request?.headers[.init("X-Custom-Key")!], "value")
-    XCTAssertEqual(request?.headers[.init("X-Client-Info")!], "functions-swift/\(Functions.version)")
+    XCTAssertEqual(request?.0.url, url)
+    XCTAssertEqual(request?.0.method, .post)
+    XCTAssertEqual(request?.0.headerFields[.apiKey], apiKey)
+    XCTAssertEqual(request?.0.headerFields[.init("X-Custom-Key")!], "value")
+    XCTAssertEqual(request?.0.headerFields[.xClientInfo], "functions-swift/\(Functions.version)")
   }
 
   func testInvokeWithCustomMethod() async throws {
-    let http = await HTTPClientMock().any { _ in try .stub(body: Empty()) }
+    let http = await HTTPClientMock().any { _, _ in try TestStub.stub(body: Empty()) }
 
     let sut = FunctionsClient(
       url: url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: nil,
       http: http
     )
@@ -72,15 +73,15 @@ final class FunctionsClientTests: XCTestCase {
     try await sut.invoke("hello-world", options: .init(method: .delete))
 
     let request = await http.receivedRequests.last
-    XCTAssertEqual(request?.method, .delete)
+    XCTAssertEqual(request?.0.method, .delete)
   }
 
   func testInvokeWithQuery() async throws {
-    let http = await HTTPClientMock().any { _ in try .stub(body: Empty()) }
+    let http = await HTTPClientMock().any { _, _ in try TestStub.stub(body: Empty()) }
 
     let sut = FunctionsClient(
       url: url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: nil,
       http: http
     )
@@ -93,12 +94,12 @@ final class FunctionsClientTests: XCTestCase {
     )
 
     let request = await http.receivedRequests.last
-    XCTAssertEqual(request?.urlRequest.url?.query, "key=value")
+    XCTAssertEqual(request?.0.url?.query, "key=value")
   }
 
   func testInvokeWithRegionDefinedInClient() async throws {
     let http = await HTTPClientMock()
-      .any { _ in try .stub(body: Empty()) }
+      .any { _, _ in try TestStub.stub(body: Empty()) }
 
     let sut = FunctionsClient(
       url: url,
@@ -110,12 +111,12 @@ final class FunctionsClientTests: XCTestCase {
     try await sut.invoke("hello-world")
 
     let request = await http.receivedRequests.last
-    XCTAssertEqual(request?.headers[.xRegion], "ca-central-1")
+    XCTAssertEqual(request?.0.headerFields[.xRegion], "ca-central-1")
   }
 
   func testInvokeWithRegion() async throws {
     let http = await HTTPClientMock()
-      .any { _ in try .stub(body: Empty()) }
+      .any { _, _ in try TestStub.stub(body: Empty()) }
 
     let sut = FunctionsClient(
       url: url,
@@ -127,12 +128,12 @@ final class FunctionsClientTests: XCTestCase {
     try await sut.invoke("hello-world", options: .init(region: .caCentral1))
 
     let request = await http.receivedRequests.last
-    XCTAssertEqual(request?.headers[.xRegion], "ca-central-1")
+    XCTAssertEqual(request?.0.headerFields[.xRegion], "ca-central-1")
   }
 
   func testInvokeWithoutRegion() async throws {
     let http = await HTTPClientMock()
-      .any { _ in try .stub(body: Empty()) }
+      .any { _, _ in try TestStub.stub(body: Empty()) }
 
     let sut = FunctionsClient(
       url: url,
@@ -144,16 +145,16 @@ final class FunctionsClientTests: XCTestCase {
     try await sut.invoke("hello-world")
 
     let request = await http.receivedRequests.last
-    XCTAssertNil(request?.headers[.xRegion])
+    XCTAssertNil(request?.0.headerFields[.xRegion])
   }
 
   func testInvoke_shouldThrow_URLError_badServerResponse() async {
     let sut = await FunctionsClient(
       url: url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: nil,
       http: HTTPClientMock()
-        .any { _ in throw URLError(.badServerResponse) }
+        .any { _, _ in throw URLError(.badServerResponse) }
     )
 
     do {
@@ -168,10 +169,10 @@ final class FunctionsClientTests: XCTestCase {
   func testInvoke_shouldThrow_FunctionsError_httpError() async {
     let sut = await FunctionsClient(
       url: url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: nil,
       http: HTTPClientMock()
-        .any { _ in try .stub(body: Empty(), statusCode: 300) }
+        .any { _, _ in try TestStub.stub(body: Empty(), statusCode: 300) }
     )
     do {
       try await sut.invoke("hello_world")
@@ -186,10 +187,10 @@ final class FunctionsClientTests: XCTestCase {
   func testInvoke_shouldThrow_FunctionsError_relayError() async {
     let sut = await FunctionsClient(
       url: url,
-      headers: ["Apikey": apiKey],
+      headers: [.apiKey: apiKey],
       region: nil,
-      http: HTTPClientMock().any { _ in
-        try .stub(
+      http: HTTPClientMock().any { _, _ in
+        try TestStub.stub(
           body: Empty(),
           headers: [.xRelayError: "true"]
         )
@@ -211,23 +212,18 @@ final class FunctionsClientTests: XCTestCase {
   }
 }
 
-extension Helpers.HTTPResponse {
+struct TestStub {
   static func stub(
     body: any Encodable,
     statusCode: Int = 200,
     headers: HTTPFields = .init()
-  ) throws -> Helpers.HTTPResponse {
+  ) throws -> (Data, HTTPResponse) {
     let data = try JSONEncoder().encode(body)
-    let response = HTTPURLResponse(
-      url: URL(string: "http://127.0.0.1")!,
-      statusCode: statusCode,
-      httpVersion: nil,
-      headerFields: headers.dictionary
-    )!
-    return HTTPResponse(
-      data: data,
-      response: response
+    let response = HTTPResponse(
+      status: .init(code: statusCode),
+      headerFields: headers
     )
+    return (data, response)
   }
 }
 
diff --git a/Tests/FunctionsTests/RequestTests.swift b/Tests/FunctionsTests/RequestTests.swift
index 30d8bab1..e786db47 100644
--- a/Tests/FunctionsTests/RequestTests.swift
+++ b/Tests/FunctionsTests/RequestTests.swift
@@ -5,10 +5,15 @@
 //  Created by Guilherme Souza on 23/04/24.
 //
 
-@testable import Functions
 import SnapshotTesting
 import XCTest
 
+@testable import Functions
+
+#if canImport(FoundationNetworking)
+  import FoundationNetworking
+#endif
+
 final class RequestTests: XCTestCase {
   let url = URL(string: "http://localhost:5432/functions/v1")!
   let apiKey = "supabase.anon.key"
@@ -33,7 +38,10 @@ final class RequestTests: XCTestCase {
 
   func testInvokeWithCustomHeader() async {
     await snapshot {
-      try await $0.invoke("hello-world", options: .init(headers: ["x-custom-key": "custom value"]))
+      try await $0.invoke(
+        "hello-world",
+        options: .init(headers: [.init("x-custom-key")!: "custom value"])
+      )
     }
   }
 
@@ -52,10 +60,19 @@ final class RequestTests: XCTestCase {
   ) async {
     let sut = FunctionsClient(
       url: url,
-      headers: ["apikey": apiKey, "x-client-info": "functions-swift/x.y.z"]
-    ) { request in
+      headers: [.apiKey: apiKey, .xClientInfo: "functions-swift/x.y.z"]
+    ) { request, bodyData in
       await MainActor.run {
-        assertSnapshot(of: request, as: .curl, record: record, file: file, testName: testName, line: line)
+        var request = URLRequest(httpRequest: request)!
+        request.httpBody = bodyData
+        assertSnapshot(
+          of: request,
+          as: .curl,
+          record: record,
+          file: file,
+          testName: testName,
+          line: line
+        )
       }
       throw NSError(domain: "Error", code: 0, userInfo: nil)
     }
diff --git a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithBody.1.txt b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithBody.1.txt
index a8f7bbe3..e33899f3 100644
--- a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithBody.1.txt
+++ b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithBody.1.txt
@@ -1,7 +1,7 @@
 curl \
 	--request POST \
 	--header "Content-Type: application/json" \
-	--header "apikey: supabase.anon.key" \
-	--header "x-client-info: functions-swift/x.y.z" \
+	--header "X-Client-Info: functions-swift/x.y.z" \
+	--header "apiKey: supabase.anon.key" \
 	--data "{\"name\":\"Supabase\"}" \
 	"http://localhost:5432/functions/v1/hello-world"
\ No newline at end of file
diff --git a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomHeader.1.txt b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomHeader.1.txt
index 3efebb9b..f0cafce8 100644
--- a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomHeader.1.txt
+++ b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomHeader.1.txt
@@ -1,6 +1,6 @@
 curl \
 	--request POST \
-	--header "apikey: supabase.anon.key" \
-	--header "x-client-info: functions-swift/x.y.z" \
+	--header "X-Client-Info: functions-swift/x.y.z" \
+	--header "apiKey: supabase.anon.key" \
 	--header "x-custom-key: custom value" \
 	"http://localhost:5432/functions/v1/hello-world"
\ No newline at end of file
diff --git a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomMethod.1.txt b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomMethod.1.txt
index a4460b69..178c9291 100644
--- a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomMethod.1.txt
+++ b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomMethod.1.txt
@@ -1,5 +1,5 @@
 curl \
 	--request PATCH \
-	--header "apikey: supabase.anon.key" \
-	--header "x-client-info: functions-swift/x.y.z" \
+	--header "X-Client-Info: functions-swift/x.y.z" \
+	--header "apiKey: supabase.anon.key" \
 	"http://localhost:5432/functions/v1/hello-world"
\ No newline at end of file
diff --git a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomRegion.1.txt b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomRegion.1.txt
index b7ebf5c7..65edd1ba 100644
--- a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomRegion.1.txt
+++ b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithCustomRegion.1.txt
@@ -1,6 +1,6 @@
 curl \
 	--request POST \
-	--header "apikey: supabase.anon.key" \
-	--header "x-client-info: functions-swift/x.y.z" \
+	--header "X-Client-Info: functions-swift/x.y.z" \
+	--header "apiKey: supabase.anon.key" \
 	--header "x-region: ap-northeast-1" \
 	"http://localhost:5432/functions/v1/hello-world"
\ No newline at end of file
diff --git a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithDefaultOptions.1.txt b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithDefaultOptions.1.txt
index 053472bb..9e1d0834 100644
--- a/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithDefaultOptions.1.txt
+++ b/Tests/FunctionsTests/__Snapshots__/RequestTests/testInvokeWithDefaultOptions.1.txt
@@ -1,5 +1,5 @@
 curl \
 	--request POST \
-	--header "apikey: supabase.anon.key" \
-	--header "x-client-info: functions-swift/x.y.z" \
+	--header "X-Client-Info: functions-swift/x.y.z" \
+	--header "apiKey: supabase.anon.key" \
 	"http://localhost:5432/functions/v1/hello-world"
\ No newline at end of file
diff --git a/Tests/HelpersTests/ObservationTokenTests.swift b/Tests/HelpersTests/ObservationTokenTests.swift
index 16eec655..6deb021e 100644
--- a/Tests/HelpersTests/ObservationTokenTests.swift
+++ b/Tests/HelpersTests/ObservationTokenTests.swift
@@ -7,9 +7,10 @@
 
 import ConcurrencyExtras
 import Foundation
-@testable import Helpers
 import XCTest
 
+@testable import Helpers
+
 final class ObservationTokenTests: XCTestCase {
   func testRemove() {
     let handle = ObservationToken()
diff --git a/Tests/IntegrationTests/AuthClientIntegrationTests.swift b/Tests/IntegrationTests/AuthClientIntegrationTests.swift
index d72637c8..fd64b382 100644
--- a/Tests/IntegrationTests/AuthClientIntegrationTests.swift
+++ b/Tests/IntegrationTests/AuthClientIntegrationTests.swift
@@ -5,12 +5,13 @@
 //  Created by Guilherme Souza on 27/03/24.
 //
 
-@testable import Auth
 import ConcurrencyExtras
 import CustomDump
 import TestHelpers
 import XCTest
 
+@testable import Auth
+
 #if canImport(FoundationNetworking)
   import FoundationNetworking
 #endif
@@ -24,8 +25,8 @@ final class AuthClientIntegrationTests: XCTestCase {
       configuration: AuthClient.Configuration(
         url: URL(string: "\(DotEnv.SUPABASE_URL)/auth/v1")!,
         headers: [
-          "apikey": key,
-          "Authorization": "Bearer \(key)",
+          .apiKey: key,
+          .authorization: "Bearer \(key)",
         ],
         localStorage: InMemoryLocalStorage(),
         logger: nil
diff --git a/Tests/IntegrationTests/PostgrestIntegrationTests.swift b/Tests/IntegrationTests/PostgrestIntegrationTests.swift
index 6336fcfc..a8398ebf 100644
--- a/Tests/IntegrationTests/PostgrestIntegrationTests.swift
+++ b/Tests/IntegrationTests/PostgrestIntegrationTests.swift
@@ -38,7 +38,7 @@ final class IntegrationTests: XCTestCase {
   let client = PostgrestClient(
     url: URL(string: "\(DotEnv.SUPABASE_URL)/rest/v1")!,
     headers: [
-      "Apikey": DotEnv.SUPABASE_ANON_KEY,
+      .apiKey: DotEnv.SUPABASE_ANON_KEY
     ],
     logger: nil
   )
diff --git a/Tests/IntegrationTests/Potsgrest/PostgresTransformsTests.swift b/Tests/IntegrationTests/Potsgrest/PostgresTransformsTests.swift
index a0c5925e..99278637 100644
--- a/Tests/IntegrationTests/Potsgrest/PostgresTransformsTests.swift
+++ b/Tests/IntegrationTests/Potsgrest/PostgresTransformsTests.swift
@@ -14,7 +14,7 @@ final class PostgrestTransformsTests: XCTestCase {
     configuration: PostgrestClient.Configuration(
       url: URL(string: "\(DotEnv.SUPABASE_URL)/rest/v1")!,
       headers: [
-        "apikey": DotEnv.SUPABASE_ANON_KEY
+        .apiKey: DotEnv.SUPABASE_ANON_KEY
       ],
       logger: nil
     )
diff --git a/Tests/IntegrationTests/Potsgrest/PostgrestBasicTests.swift b/Tests/IntegrationTests/Potsgrest/PostgrestBasicTests.swift
index 9912b4d1..ee86afb9 100644
--- a/Tests/IntegrationTests/Potsgrest/PostgrestBasicTests.swift
+++ b/Tests/IntegrationTests/Potsgrest/PostgrestBasicTests.swift
@@ -14,7 +14,7 @@ final class PostgrestBasicTests: XCTestCase {
     configuration: PostgrestClient.Configuration(
       url: URL(string: "\(DotEnv.SUPABASE_URL)/rest/v1")!,
       headers: [
-        "apikey": DotEnv.SUPABASE_ANON_KEY,
+        .apiKey: DotEnv.SUPABASE_ANON_KEY
       ],
       logger: nil
     )
diff --git a/Tests/IntegrationTests/Potsgrest/PostgrestFilterTests.swift b/Tests/IntegrationTests/Potsgrest/PostgrestFilterTests.swift
index 9ec7e3b1..b6fa13be 100644
--- a/Tests/IntegrationTests/Potsgrest/PostgrestFilterTests.swift
+++ b/Tests/IntegrationTests/Potsgrest/PostgrestFilterTests.swift
@@ -14,7 +14,7 @@ final class PostgrestFilterTests: XCTestCase {
     configuration: PostgrestClient.Configuration(
       url: URL(string: "\(DotEnv.SUPABASE_URL)/rest/v1")!,
       headers: [
-        "apikey": DotEnv.SUPABASE_ANON_KEY,
+        .apiKey: DotEnv.SUPABASE_ANON_KEY
       ],
       logger: nil
     )
diff --git a/Tests/IntegrationTests/Potsgrest/PostgrestResourceEmbeddingTests.swift b/Tests/IntegrationTests/Potsgrest/PostgrestResourceEmbeddingTests.swift
index c4acfbda..3f9d7af1 100644
--- a/Tests/IntegrationTests/Potsgrest/PostgrestResourceEmbeddingTests.swift
+++ b/Tests/IntegrationTests/Potsgrest/PostgrestResourceEmbeddingTests.swift
@@ -14,7 +14,7 @@ final class PostgrestResourceEmbeddingTests: XCTestCase {
     configuration: PostgrestClient.Configuration(
       url: URL(string: "\(DotEnv.SUPABASE_URL)/rest/v1")!,
       headers: [
-        "apikey": DotEnv.SUPABASE_ANON_KEY,
+        .apiKey: DotEnv.SUPABASE_ANON_KEY
       ],
       logger: nil
     )
diff --git a/Tests/IntegrationTests/RealtimeIntegrationTests.swift b/Tests/IntegrationTests/RealtimeIntegrationTests.swift
index 4b2b543a..000640ca 100644
--- a/Tests/IntegrationTests/RealtimeIntegrationTests.swift
+++ b/Tests/IntegrationTests/RealtimeIntegrationTests.swift
@@ -8,23 +8,24 @@
 import ConcurrencyExtras
 import CustomDump
 import PostgREST
-@testable import Realtime
 import Supabase
 import TestHelpers
 import XCTest
 
+@testable import Realtime
+
 final class RealtimeIntegrationTests: XCTestCase {
   let realtime = RealtimeClientV2(
     url: URL(string: "\(DotEnv.SUPABASE_URL)/realtime/v1")!,
     options: RealtimeClientOptions(
-      headers: ["apikey": DotEnv.SUPABASE_ANON_KEY]
+      headers: [.apiKey: DotEnv.SUPABASE_ANON_KEY]
     )
   )
 
   let db = PostgrestClient(
     url: URL(string: "\(DotEnv.SUPABASE_URL)/rest/v1")!,
     headers: [
-      "apikey": DotEnv.SUPABASE_ANON_KEY,
+      .apiKey: DotEnv.SUPABASE_ANON_KEY
     ]
   )
 
@@ -73,14 +74,14 @@ final class RealtimeIntegrationTests: XCTestCase {
         [
           "event": "test",
           "payload": [
-            "value": 1,
+            "value": 1
           ],
           "type": "broadcast",
         ],
         [
           "event": "test",
           "payload": [
-            "value": 2,
+            "value": 2
           ],
           "type": "broadcast",
         ],
@@ -151,7 +152,7 @@ final class RealtimeIntegrationTests: XCTestCase {
     expectNoDifference(
       joins,
       [
-        [], // This is the first PRESENCE_STATE event.
+        [],  // This is the first PRESENCE_STATE event.
         [UserState(email: "test@supabase.com")],
         [UserState(email: "test2@supabase.com")],
         [],
@@ -161,7 +162,7 @@ final class RealtimeIntegrationTests: XCTestCase {
     expectNoDifference(
       leaves,
       [
-        [], // This is the first PRESENCE_STATE event.
+        [],  // This is the first PRESENCE_STATE event.
         [],
         [UserState(email: "test@supabase.com")],
         [UserState(email: "test2@supabase.com")],
diff --git a/Tests/IntegrationTests/StorageClientIntegrationTests.swift b/Tests/IntegrationTests/StorageClientIntegrationTests.swift
index 2d073eab..df32ed7f 100644
--- a/Tests/IntegrationTests/StorageClientIntegrationTests.swift
+++ b/Tests/IntegrationTests/StorageClientIntegrationTests.swift
@@ -14,7 +14,7 @@ final class StorageClientIntegrationTests: XCTestCase {
     configuration: StorageClientConfiguration(
       url: URL(string: "\(DotEnv.SUPABASE_URL)/storage/v1")!,
       headers: [
-        "Authorization": "Bearer \(DotEnv.SUPABASE_SERVICE_ROLE_KEY)",
+        .authorization: "Bearer \(DotEnv.SUPABASE_SERVICE_ROLE_KEY)"
       ],
       logger: nil
     )
@@ -36,7 +36,10 @@ final class StorageClientIntegrationTests: XCTestCase {
     buckets = try await storage.listBuckets()
     XCTAssertTrue(buckets.contains { $0.id == bucket.id })
 
-    try await storage.updateBucket(bucketName, options: BucketOptions(allowedMimeTypes: ["image/jpeg"]))
+    try await storage.updateBucket(
+      bucketName,
+      options: BucketOptions(allowedMimeTypes: ["image/jpeg"])
+    )
 
     bucket = try await storage.getBucket(bucketName)
     XCTAssertEqual(bucket.allowedMimeTypes, ["image/jpeg"])
diff --git a/Tests/IntegrationTests/StorageFileIntegrationTests.swift b/Tests/IntegrationTests/StorageFileIntegrationTests.swift
index 188090a9..02f5a912 100644
--- a/Tests/IntegrationTests/StorageFileIntegrationTests.swift
+++ b/Tests/IntegrationTests/StorageFileIntegrationTests.swift
@@ -5,10 +5,11 @@
 //  Created by Guilherme Souza on 07/05/24.
 //
 
+import HTTPTypes
+import Helpers
 import InlineSnapshotTesting
 import Storage
 import XCTest
-import Helpers
 
 #if canImport(FoundationNetworking)
   import FoundationNetworking
@@ -19,7 +20,7 @@ final class StorageFileIntegrationTests: XCTestCase {
     configuration: StorageClientConfiguration(
       url: URL(string: "\(DotEnv.SUPABASE_URL)/storage/v1")!,
       headers: [
-        "Authorization": "Bearer \(DotEnv.SUPABASE_SERVICE_ROLE_KEY)"
+        .authorization: "Bearer \(DotEnv.SUPABASE_SERVICE_ROLE_KEY)"
       ],
       logger: nil
     )
@@ -378,9 +379,13 @@ final class StorageFileIntegrationTests: XCTestCase {
 
     let publicURL = try storage.from(bucketName).getPublicURL(path: uploadPath)
 
-    let (_, response) = try await URLSession.shared.data(from: publicURL)
-    let httpResponse = try XCTUnwrap(response as? HTTPURLResponse)
-    let cacheControl = try XCTUnwrap(httpResponse.value(forHTTPHeaderField: "cache-control"))
+    let request = HTTPRequest(
+      method: .get,
+      url: publicURL
+    )
+
+    let (_, response) = try await URLSession.shared.data(for: request)
+    let cacheControl = try XCTUnwrap(response.headerFields[.cacheControl])
 
     XCTAssertEqual(cacheControl, "public, max-age=14400")
   }
diff --git a/Tests/PostgRESTTests/BuildURLRequestTests.swift b/Tests/PostgRESTTests/BuildURLRequestTests.swift
index c4ba68d1..f909f4b5 100644
--- a/Tests/PostgRESTTests/BuildURLRequestTests.swift
+++ b/Tests/PostgRESTTests/BuildURLRequestTests.swift
@@ -1,5 +1,6 @@
 import ConcurrencyExtras
 import Foundation
+import HTTPTypes
 import Helpers
 import SnapshotTesting
 import XCTest
@@ -49,15 +50,18 @@ final class BuildURLRequestTests: XCTestCase {
     let client = PostgrestClient(
       url: url,
       schema: nil,
-      headers: ["X-Client-Info": "postgrest-swift/x.y.z"],
+      headers: [.xClientInfo: "postgrest-swift/x.y.z"],
       logger: nil,
-      fetch: { request in
+      fetch: { request, bodyData in
         guard let runningTestCase = await runningTestCase.value else {
           XCTFail("execute called without a runningTestCase set.")
-          return (Data(), URLResponse.empty())
+          return (Data(), HTTPResponse(status: .ok))
         }
 
         await MainActor.run { [runningTestCase] in
+          var request = URLRequest(httpRequest: request)!
+          request.httpBody = bodyData
+
           assertSnapshot(
             of: request,
             as: .curl,
@@ -69,7 +73,7 @@ final class BuildURLRequestTests: XCTestCase {
           )
         }
 
-        return (Data(), URLResponse.empty())
+        return (Data(), HTTPResponse(status: .ok))
       },
       encoder: encoder
     )
@@ -251,26 +255,7 @@ final class BuildURLRequestTests: XCTestCase {
 
   func testSessionConfiguration() {
     let client = PostgrestClient(url: url, schema: nil, logger: nil)
-    let clientInfoHeader = client.configuration.headers["X-Client-Info"]
+    let clientInfoHeader = client.configuration.headers[.xClientInfo]
     XCTAssertNotNil(clientInfoHeader)
   }
 }
-
-extension URLResponse {
-  // Windows and Linux don't have the ability to empty initialize a URLResponse like `URLResponse()`
-  // so
-  // We provide a function that can give us the right value on an platform.
-  // See https://github.com/apple/swift-corelibs-foundation/pull/4778
-  fileprivate static func empty() -> URLResponse {
-    #if os(Windows) || os(Linux)
-      URLResponse(
-        url: .init(string: "https://supabase.com")!,
-        mimeType: nil,
-        expectedContentLength: 0,
-        textEncodingName: nil
-      )
-    #else
-      URLResponse()
-    #endif
-  }
-}
diff --git a/Tests/PostgRESTTests/JSONTests.swift b/Tests/PostgRESTTests/JSONTests.swift
index dabf2d97..5b339933 100644
--- a/Tests/PostgRESTTests/JSONTests.swift
+++ b/Tests/PostgRESTTests/JSONTests.swift
@@ -5,16 +5,17 @@
 //  Created by Guilherme Souza on 01/07/24.
 //
 
-@testable import PostgREST
 import XCTest
 
+@testable import PostgREST
+
 final class JSONTests: XCTestCase {
   func testDecodeJSON() throws {
     let json = """
-    {
-      "created_at": "2024-06-15T18:12:04+00:00"
-    }
-    """.data(using: .utf8)!
+      {
+        "created_at": "2024-06-15T18:12:04+00:00"
+      }
+      """.data(using: .utf8)!
 
     struct Value: Decodable {
       var createdAt: Date
diff --git a/Tests/PostgRESTTests/PostgrestBuilderTests.swift b/Tests/PostgRESTTests/PostgrestBuilderTests.swift
index 1fa049a4..41466c28 100644
--- a/Tests/PostgRESTTests/PostgrestBuilderTests.swift
+++ b/Tests/PostgRESTTests/PostgrestBuilderTests.swift
@@ -5,19 +5,23 @@
 //  Created by Guilherme Souza on 20/08/24.
 //
 
-@testable import PostgREST
 import XCTest
 
+@testable import PostgREST
+
 final class PostgrestBuilderTests: XCTestCase {
   let url = URL(string: "http://localhost:54321/rest/v1")!
 
   func testCustomHeaderOnAPerCallBasis() throws {
-    let postgrest1 = PostgrestClient(url: url, headers: ["apikey": "foo"], logger: nil)
-    let postgrest2 = try postgrest1.rpc("void_func").setHeader(name: .init("apikey")!, value: "bar")
+    let postgrest1 = PostgrestClient(url: url, headers: [.apiKey: "foo"], logger: nil)
+    let postgrest2 = try postgrest1.rpc("void_func").setHeader(name: .apiKey, value: "bar")
 
     // Original client object isn't affected
-    XCTAssertEqual(postgrest1.from("users").select().mutableState.request.headers[.init("apikey")!], "foo")
+    XCTAssertEqual(
+      postgrest1.from("users").select().mutableState.request.headerFields[.apiKey],
+      "foo"
+    )
     // Derived client object uses new header value
-    XCTAssertEqual(postgrest2.mutableState.request.headers[.init("apikey")!], "bar")
+    XCTAssertEqual(postgrest2.mutableState.request.headerFields[.apiKey], "bar")
   }
 }
diff --git a/Tests/PostgRESTTests/PostgrestResponseTests.swift b/Tests/PostgRESTTests/PostgrestResponseTests.swift
index 09637818..9c65311e 100644
--- a/Tests/PostgRESTTests/PostgrestResponseTests.swift
+++ b/Tests/PostgRESTTests/PostgrestResponseTests.swift
@@ -1,3 +1,4 @@
+import HTTPTypes
 import XCTest
 
 @testable import PostgREST
@@ -10,12 +11,10 @@ class PostgrestResponseTests: XCTestCase {
   func testInit() {
     // Prepare data and response
     let data = Data()
-    let response = HTTPURLResponse(
-      url: URL(string: "http://example.com")!,
-      statusCode: 200,
-      httpVersion: nil,
-      headerFields: ["Content-Range": "bytes 0-100/200"]
-    )!
+    let response = HTTPResponse(
+      status: .init(code: 200),
+      headerFields: [.contentRange: "bytes 0-100/200"]
+    )
     let value = "Test Value"
 
     // Create the PostgrestResponse instance
@@ -32,12 +31,10 @@ class PostgrestResponseTests: XCTestCase {
   func testInitWithNoCount() {
     // Prepare data and response
     let data = Data()
-    let response = HTTPURLResponse(
-      url: URL(string: "http://example.com")!,
-      statusCode: 200,
-      httpVersion: nil,
-      headerFields: ["Content-Range": "*"]
-    )!
+    let response = HTTPResponse(
+      status: .init(code: 200),
+      headerFields: [.contentRange: "*"]
+    )
     let value = "Test Value"
 
     // Create the PostgrestResponse instance
diff --git a/Tests/RealtimeTests/MockWebSocketClient.swift b/Tests/RealtimeTests/MockWebSocketClient.swift
index bcabc958..5580b122 100644
--- a/Tests/RealtimeTests/MockWebSocketClient.swift
+++ b/Tests/RealtimeTests/MockWebSocketClient.swift
@@ -7,9 +7,10 @@
 
 import ConcurrencyExtras
 import Foundation
-@testable import Realtime
 import XCTestDynamicOverlay
 
+@testable import Realtime
+
 #if canImport(FoundationNetworking)
   import FoundationNetworking
 #endif
diff --git a/Tests/RealtimeTests/PostgresJoinConfigTests.swift b/Tests/RealtimeTests/PostgresJoinConfigTests.swift
index bb695d18..64db6c56 100644
--- a/Tests/RealtimeTests/PostgresJoinConfigTests.swift
+++ b/Tests/RealtimeTests/PostgresJoinConfigTests.swift
@@ -5,9 +5,10 @@
 //  Created by Guilherme Souza on 26/12/23.
 //
 
-@testable import Realtime
 import XCTest
 
+@testable import Realtime
+
 final class PostgresJoinConfigTests: XCTestCase {
   func testSameConfigButDifferentIdAreEqual() {
     let config1 = PostgresJoinConfig(
diff --git a/Tests/RealtimeTests/RealtimeTests.swift b/Tests/RealtimeTests/RealtimeTests.swift
index 35a318cc..b7956208 100644
--- a/Tests/RealtimeTests/RealtimeTests.swift
+++ b/Tests/RealtimeTests/RealtimeTests.swift
@@ -1,5 +1,6 @@
 import ConcurrencyExtras
 import CustomDump
+import HTTPTypes
 import Helpers
 import InlineSnapshotTesting
 import TestHelpers
@@ -33,7 +34,7 @@ final class RealtimeTests: XCTestCase {
     sut = RealtimeClientV2(
       url: url,
       options: RealtimeClientOptions(
-        headers: ["apikey": apiKey],
+        headers: [.apiKey: apiKey],
         heartbeatInterval: 1,
         reconnectDelay: 1,
         timeoutInterval: 2
@@ -298,17 +299,12 @@ final class RealtimeTests: XCTestCase {
   }
 
   func testBroadcastWithHTTP() async throws {
-    await http.when {
-      $0.url.path.hasSuffix("broadcast")
-    } return: { _ in
-      HTTPResponse(
-        data: "{}".data(using: .utf8)!,
-        response: HTTPURLResponse(
-          url: self.sut.broadcastURL,
-          statusCode: 200,
-          httpVersion: nil,
-          headerFields: nil
-        )!
+    await http.when { request, bodyData in
+      request.url!.path.hasSuffix("broadcast")
+    } return: { _, _ in
+      (
+        Data("{}".utf8),
+        HTTPResponse(status: .init(code: 200))
       )
     }
 
@@ -319,7 +315,10 @@ final class RealtimeTests: XCTestCase {
     try await channel.broadcast(event: "test", message: ["value": 42])
 
     let request = await http.receivedRequests.last
-    assertInlineSnapshot(of: request?.urlRequest, as: .raw(pretty: true)) {
+    var urlRequest = request.map { URLRequest(httpRequest: $0.0) }
+    urlRequest??.httpBody = request?.1
+
+    assertInlineSnapshot(of: urlRequest as? URLRequest, as: .raw(pretty: true)) {
       """
       POST https://localhost:54321/realtime/v1/api/broadcast
       Authorization: Bearer anon.api.key
diff --git a/Tests/RealtimeTests/_PushTests.swift b/Tests/RealtimeTests/_PushTests.swift
index 67efc7a1..871c0bed 100644
--- a/Tests/RealtimeTests/_PushTests.swift
+++ b/Tests/RealtimeTests/_PushTests.swift
@@ -6,10 +6,11 @@
 //
 
 import ConcurrencyExtras
-@testable import Realtime
 import TestHelpers
 import XCTest
 
+@testable import Realtime
+
 final class _PushTests: XCTestCase {
   var ws: MockWebSocketClient!
   var socket: RealtimeClientV2!
@@ -27,7 +28,7 @@ final class _PushTests: XCTestCase {
     socket = RealtimeClientV2(
       url: URL(string: "https://localhost:54321/v1/realtime")!,
       options: RealtimeClientOptions(
-        headers: ["apiKey": "apikey"]
+        headers: [.apiKey: "apikey"]
       ),
       ws: ws,
       http: HTTPClientMock()
diff --git a/Tests/StorageTests/SupabaseStorageClient+Test.swift b/Tests/StorageTests/SupabaseStorageClient+Test.swift
index ac10137f..bb9dace9 100644
--- a/Tests/StorageTests/SupabaseStorageClient+Test.swift
+++ b/Tests/StorageTests/SupabaseStorageClient+Test.swift
@@ -18,9 +18,9 @@ extension SupabaseStorageClient {
       configuration: StorageClientConfiguration(
         url: URL(string: supabaseURL)!,
         headers: [
-          "Authorization": "Bearer \(apiKey)",
-          "Apikey": apiKey,
-          "X-Client-Info": "storage-swift/x.y.z",
+          .authorization: "Bearer \(apiKey)",
+          .apiKey: apiKey,
+          .xClientInfo: "storage-swift/x.y.z",
         ],
         session: session,
         logger: nil
diff --git a/Tests/StorageTests/SupabaseStorageTests.swift b/Tests/StorageTests/SupabaseStorageTests.swift
index 5742538d..e05dd777 100644
--- a/Tests/StorageTests/SupabaseStorageTests.swift
+++ b/Tests/StorageTests/SupabaseStorageTests.swift
@@ -1,5 +1,6 @@
 import CustomDump
 import Foundation
+import HTTPTypes
 import InlineSnapshotTesting
 import XCTest
 import XCTestDynamicOverlay
@@ -15,8 +16,7 @@ final class SupabaseStorageTests: XCTestCase {
   let bucketId = "tests"
 
   var sessionMock = StorageHTTPSession(
-    fetch: unimplemented("StorageHTTPSession.fetch"),
-    upload: unimplemented("StorageHTTPSession.upload")
+    fetch: unimplemented("StorageHTTPSession.fetch")
   )
 
   func testGetPublicURL() throws {
@@ -58,24 +58,20 @@ final class SupabaseStorageTests: XCTestCase {
   }
 
   func testCreateSignedURLs() async throws {
-    sessionMock.fetch = { _ in
+    sessionMock.fetch = { _, _ in
       (
-        """
-        [
-          {
-            "signedURL": "/sign/file1.txt?token=abc.def.ghi"
-          },
-          {
-            "signedURL": "/sign/file2.txt?token=abc.def.ghi"
-          },
-        ]
-        """.data(using: .utf8)!,
-        HTTPURLResponse(
-          url: self.supabaseURL,
-          statusCode: 200,
-          httpVersion: nil,
-          headerFields: nil
-        )!
+        Data(
+          """
+          [
+            {
+              "signedURL": "/sign/file1.txt?token=abc.def.ghi"
+            },
+            {
+              "signedURL": "/sign/file2.txt?token=abc.def.ghi"
+            },
+          ]
+          """.utf8),
+        HTTPResponse(status: .init(code: 200))
       )
     }
 
@@ -96,16 +92,19 @@ final class SupabaseStorageTests: XCTestCase {
     func testUploadData() async throws {
       testingBoundary.setValue("alamofire.boundary.c21f947c1c7b0c57")
 
-      sessionMock.fetch = { request in
+      sessionMock.fetch = { request, bodyData in
+        var request = URLRequest(httpRequest: request)!
+        request.httpBody = bodyData
+
         assertInlineSnapshot(of: request, as: .curl) {
           #"""
           curl \
           	--request POST \
-          	--header "Apikey: test.api.key" \
           	--header "Authorization: Bearer test.api.key" \
           	--header "Cache-Control: max-age=14400" \
           	--header "Content-Type: multipart/form-data; boundary=alamofire.boundary.c21f947c1c7b0c57" \
           	--header "X-Client-Info: storage-swift/x.y.z" \
+          	--header "apiKey: test.api.key" \
           	--header "x-upsert: false" \
           	--data "--alamofire.boundary.c21f947c1c7b0c57\#r
           Content-Disposition: form-data; name=\"cacheControl\"\#r
@@ -126,18 +125,16 @@ final class SupabaseStorageTests: XCTestCase {
           """#
         }
         return (
-          """
-          {
-            "Id": "tests/file1.txt",
-            "Key": "tests/file1.txt"
-          }
-          """.data(using: .utf8)!,
-          HTTPURLResponse(
-            url: self.supabaseURL,
-            statusCode: 200,
-            httpVersion: nil,
-            headerFields: nil
-          )!
+          Data(
+            """
+            {
+              "Id": "tests/file1.txt",
+              "Key": "tests/file1.txt"
+            }
+            """.utf8),
+          HTTPResponse(
+            status: .init(code: 200)
+          )
         )
       }
 
@@ -157,33 +154,31 @@ final class SupabaseStorageTests: XCTestCase {
     func testUploadFileURL() async throws {
       testingBoundary.setValue("alamofire.boundary.c21f947c1c7b0c57")
 
-      sessionMock.fetch = { request in
+      sessionMock.fetch = { request, bodyData in
+        var request = URLRequest(httpRequest: request)!
+        request.httpBody = bodyData
         assertInlineSnapshot(of: request, as: .curl) {
           #"""
           curl \
           	--request POST \
-          	--header "Apikey: test.api.key" \
           	--header "Authorization: Bearer test.api.key" \
           	--header "Cache-Control: max-age=3600" \
           	--header "Content-Type: multipart/form-data; boundary=alamofire.boundary.c21f947c1c7b0c57" \
           	--header "X-Client-Info: storage-swift/x.y.z" \
+          	--header "apiKey: test.api.key" \
           	--header "x-upsert: false" \
           	"http://localhost:54321/storage/v1/object/tests/sadcat.jpg"
           """#
         }
         return (
-          """
-          {
-            "Id": "tests/file1.txt",
-            "Key": "tests/file1.txt"
-          }
-          """.data(using: .utf8)!,
-          HTTPURLResponse(
-            url: self.supabaseURL,
-            statusCode: 200,
-            httpVersion: nil,
-            headerFields: nil
-          )!
+          Data(
+            """
+            {
+              "Id": "tests/file1.txt",
+              "Key": "tests/file1.txt"
+            }
+            """.utf8),
+          HTTPResponse(status: .init(code: 200))
         )
       }
 
diff --git a/Tests/SupabaseTests/SupabaseClientTests.swift b/Tests/SupabaseTests/SupabaseClientTests.swift
index c487177d..0137cda2 100644
--- a/Tests/SupabaseTests/SupabaseClientTests.swift
+++ b/Tests/SupabaseTests/SupabaseClientTests.swift
@@ -1,10 +1,12 @@
-@testable import Auth
 import CustomDump
-@testable import Functions
+import HTTPTypes
 import IssueReporting
+import XCTest
+
+@testable import Auth
+@testable import Functions
 @testable import Realtime
 @testable import Supabase
-import XCTest
 
 final class AuthLocalStorageMock: AuthLocalStorage {
   func store(key _: String, value _: Data) throws {}
@@ -27,7 +29,7 @@ final class SupabaseClientTests: XCTestCase {
     let logger = Logger()
     let customSchema = "custom_schema"
     let localStorage = AuthLocalStorageMock()
-    let customHeaders = ["header_field": "header_value"]
+    let customHeaders: HTTPFields = [.init("header_field")!: "header_value"]
 
     let client = SupabaseClient(
       supabaseURL: URL(string: "https://project-ref.supabase.co")!,
@@ -47,7 +49,7 @@ final class SupabaseClientTests: XCTestCase {
           region: .apNortheast1
         ),
         realtime: RealtimeClientOptions(
-          headers: ["custom_realtime_header_key": "custom_realtime_header_value"]
+          headers: [.init("custom_realtime_header_key")!: "custom_realtime_header_value"]
         )
       )
     )
@@ -62,15 +64,14 @@ final class SupabaseClientTests: XCTestCase {
     )
 
     XCTAssertEqual(
-      client.headers,
+	  client.headers,
       [
-        "X-Client-Info": "supabase-swift/\(Supabase.version)",
-        "Apikey": "ANON_KEY",
-        "header_field": "header_value",
-        "Authorization": "Bearer ANON_KEY",
+		.xClientInfo: "supabase-swift/\(Supabase.version)",
+		.apiKey: "ANON_KEY",
+		.init("header_field")!: "header_value",
+		.authorization: "Bearer ANON_KEY",
       ]
     )
-    expectNoDifference(client._headers.dictionary, client.headers)
 
     XCTAssertEqual(client.functions.region, "ap-northeast-1")
 
@@ -78,9 +79,10 @@ final class SupabaseClientTests: XCTestCase {
     XCTAssertEqual(realtimeURL.absoluteString, "https://project-ref.supabase.co/realtime/v1")
 
     let realtimeOptions = client.realtimeV2.options
-    let expectedRealtimeHeader = client._headers.merging(with: [
-      .init("custom_realtime_header_key")!: "custom_realtime_header_value"]
-    )
+    let expectedRealtimeHeader = client.headers.merging([
+      .init("custom_realtime_header_key")!: "custom_realtime_header_value"
+    ]) { $1 }
+
     expectNoDifference(realtimeOptions.headers, expectedRealtimeHeader)
     XCTAssertIdentical(realtimeOptions.logger as? Logger, logger)