diff --git a/Sources/YBottomSheet/BottomSheetController+Appearance.swift b/Sources/YBottomSheet/BottomSheetController+Appearance.swift
index dea86a0..e78cf1a 100644
--- a/Sources/YBottomSheet/BottomSheetController+Appearance.swift
+++ b/Sources/YBottomSheet/BottomSheetController+Appearance.swift
@@ -32,9 +32,11 @@ extension BottomSheetController {
         ///
         /// Only applicable for resizable sheets. `nil` means to use the content view's intrinsic height as the minimum.
         public var minimumContentHeight: CGFloat?
-        /// Whether the sheet is dismissible or not. Default is `true`.
-        public var allowDismiss: Bool
-
+        /// Whether the sheet can be dismissed by swiping down or tapping on the dimmer. Default is `true`.
+        ///
+        /// The user can always dismiss the sheet from the close button if it is visible.
+        public var isDismissAllowed: Bool
+        
         /// Default appearance (fixed size sheet)
         public static let `default` = Appearance()
         /// Default appearance for a resizable sheet
@@ -51,7 +53,7 @@ extension BottomSheetController {
         ///   - presentAnimationCurve: Animaiton during presenting.
         ///   - dismissAnimationCurve: Animation during dismiss.
         ///   - minimumContentHeight: Optional) Minimum content view height.
-        ///   - allowDismiss: Whether the sheet is dismissible or not.
+        ///   - isDismissAllowed: Whether the sheet can be dismissed by swiping down or tapping on the dimmer.
         public init(
             indicatorAppearance: DragIndicatorView.Appearance? = nil,
             headerAppearance: SheetHeaderView.Appearance? = .default,
@@ -62,7 +64,7 @@ extension BottomSheetController {
             presentAnimationCurve: UIView.AnimationOptions = .curveEaseIn,
             dismissAnimationCurve: UIView.AnimationOptions = .curveEaseOut,
             minimumContentHeight: CGFloat? = nil,
-            allowDismiss: Bool = true
+            isDismissAllowed: Bool = true
         ) {
             self.indicatorAppearance = indicatorAppearance
             self.headerAppearance = headerAppearance
@@ -73,7 +75,7 @@ extension BottomSheetController {
             self.presentAnimationCurve = presentAnimationCurve
             self.dismissAnimationCurve = dismissAnimationCurve
             self.minimumContentHeight = minimumContentHeight
-            self.allowDismiss = allowDismiss
+            self.isDismissAllowed = isDismissAllowed
         }
     }
 }
diff --git a/Sources/YBottomSheet/BottomSheetController.swift b/Sources/YBottomSheet/BottomSheetController.swift
index 231e8a4..d108532 100644
--- a/Sources/YBottomSheet/BottomSheetController.swift
+++ b/Sources/YBottomSheet/BottomSheetController.swift
@@ -150,10 +150,11 @@ public class BottomSheetController: UIViewController {
         return true
     }
     
-    /// Dismiss bottom sheet.
-    /// - Parameter isCloseButton: whether close button is tapped or not.
-    func didDismiss(isCloseButton: Bool = false) {
-        if appearance.allowDismiss || isCloseButton {
+    /// Dismisses the bottom sheet if allowed.
+    ///
+    /// This method is not called when the header's close button is tapped.
+    func didDismiss() {
+        if appearance.isDismissAllowed {
             onDismiss()
         }
     }
@@ -316,8 +317,9 @@ private extension BottomSheetController {
 
 extension BottomSheetController: SheetHeaderViewDelegate {
     @objc
-    func didCloseTapped() {
-        didDismiss(isCloseButton: true)
+    func didTapCloseButton() {
+        // Directly dismiss the sheet without considering `isDismissAllowed`.
+        onDismiss()
     }
 }
 
@@ -382,6 +384,6 @@ internal extension BottomSheetController {
 
     @objc
     func simulateDismiss() {
-        didCloseTapped()
+        didTapCloseButton()
     }
 }
diff --git a/Sources/YBottomSheet/Protocols/SheetHeaderViewDelegate.swift b/Sources/YBottomSheet/Protocols/SheetHeaderViewDelegate.swift
index 3f6e395..cc16f53 100644
--- a/Sources/YBottomSheet/Protocols/SheetHeaderViewDelegate.swift
+++ b/Sources/YBottomSheet/Protocols/SheetHeaderViewDelegate.swift
@@ -9,5 +9,5 @@
 import Foundation
 
 internal protocol SheetHeaderViewDelegate: AnyObject {
-    func didCloseTapped()
+    func didTapCloseButton()
 }
diff --git a/Sources/YBottomSheet/SheetHeaderView/SheetHeaderView.swift b/Sources/YBottomSheet/SheetHeaderView/SheetHeaderView.swift
index 8741b48..a46d0f8 100644
--- a/Sources/YBottomSheet/SheetHeaderView/SheetHeaderView.swift
+++ b/Sources/YBottomSheet/SheetHeaderView/SheetHeaderView.swift
@@ -51,7 +51,7 @@ open class SheetHeaderView: UIView {
     required public init?(coder: NSCoder) { nil }
     
     @objc private func closeButtonAction() {
-        delegate?.didCloseTapped()
+        delegate?.didTapCloseButton()
     }
     
     // For unit testing
diff --git a/Tests/YBottomSheetTests/BottomSheetControllerTests.swift b/Tests/YBottomSheetTests/BottomSheetControllerTests.swift
index ab4ae56..61f60c9 100644
--- a/Tests/YBottomSheetTests/BottomSheetControllerTests.swift
+++ b/Tests/YBottomSheetTests/BottomSheetControllerTests.swift
@@ -13,6 +13,7 @@ import YMatterType
 
 // OK to have lots of test cases
 // swiftlint:disable file_length
+// swiftlint:disable type_body_length
 
 final class BottomSheetControllerTests: XCTestCase {
     var window: UIWindow!
@@ -288,9 +289,7 @@ final class BottomSheetControllerTests: XCTestCase {
         let sut = makeSUT(viewController: UINavigationController(rootViewController: UIViewController()))
         XCTAssertFalse(sut.hasHeader)
     }
-}
 
-extension BottomSheetControllerTests {
     func test_onDimmer() {
         let sut = SpyBottomSheetController(title: "", childView: UIView())
         
@@ -327,16 +326,18 @@ extension BottomSheetControllerTests {
     
     func test_forbidDismiss() {
         let sut = SpyBottomSheetController(title: "", childView: UIView())
-        sut.appearance.allowDismiss = false
+        sut.appearance.isDismissAllowed = false
         
         XCTAssertFalse(sut.onSwipeDown)
         XCTAssertFalse(sut.onDimmerTapped)
+        XCTAssertFalse(sut.isDismissed)
         
         sut.simulateOnDimmerTap()
         sut.simulateOnSwipeDown()
         
         XCTAssertFalse(sut.onSwipeDown)
         XCTAssertFalse(sut.onDimmerTapped)
+        XCTAssertFalse(sut.isDismissed)
     }
 }
 
@@ -383,24 +384,29 @@ final class SpyBottomSheetController: BottomSheetController {
     var onSwipeDown = false
     var onDimmerTapped = false
     var onDragging = false
+    
+    override func simulateDismiss() {
+        super.simulateDismiss()
+        isDismissed = true
+    }
 
-    override func didDismiss(isCloseButton: Bool) {
+    override func didDismiss() {
         super.didDismiss()
-        if isCloseButton || appearance.allowDismiss {
+        if appearance.isDismissAllowed {
             isDismissed = true
         }
     }
 
     override func simulateOnSwipeDown() {
         super.simulateOnSwipeDown()
-        if appearance.allowDismiss {
+        if appearance.isDismissAllowed {
             onSwipeDown = true
         }
     }
 
     override func simulateOnDimmerTap() {
         super.simulateOnDimmerTap()
-        if appearance.allowDismiss {
+        if appearance.isDismissAllowed {
             onDimmerTapped = true
         }
     }
diff --git a/Tests/YBottomSheetTests/SheetHeaderView/SheetHeaderViewTests.swift b/Tests/YBottomSheetTests/SheetHeaderView/SheetHeaderViewTests.swift
index d73f4d5..3ee3d56 100644
--- a/Tests/YBottomSheetTests/SheetHeaderView/SheetHeaderViewTests.swift
+++ b/Tests/YBottomSheetTests/SheetHeaderView/SheetHeaderViewTests.swift
@@ -91,7 +91,7 @@ private extension SheetHeaderViewTests {
 }
 
 extension SheetHeaderViewTests: SheetHeaderViewDelegate {
-    func didCloseTapped() {
+    func didTapCloseButton() {
         isDismissed = true
     }
 }