diff --git a/package.json b/package.json
index 7fe447a48..d902f282e 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "testcafe-hammerhead",
   "description": "A powerful web-proxy used as a core for the TestCafe testing framework (https://github.com/DevExpress/testcafe).",
-  "version": "30.0.0",
+  "version": "30.1.0",
   "homepage": "https://github.com/DevExpress/testcafe-hammerhead",
   "bugs": {
     "url": "https://github.com/DevExpress/testcafe-hammerhead/issues"
diff --git a/src/client/sandbox/xhr.ts b/src/client/sandbox/xhr.ts
index 21ec87d91..1bcb0766d 100644
--- a/src/client/sandbox/xhr.ts
+++ b/src/client/sandbox/xhr.ts
@@ -193,7 +193,7 @@ export default class XhrSandbox extends SandboxBaseWithDelayedSettings {
         });
 
         overrideFunction(xmlHttpRequestProto, 'setRequestHeader', function (this: XMLHttpRequest, ...args: Parameters<XMLHttpRequest['setRequestHeader']>) {
-            if (isAuthorizationHeader(args[0]))
+            if (!xhrSandbox.proxyless && isAuthorizationHeader(args[0]))
                 args[1] = addAuthorizationPrefix(args[1]);
 
             nativeMethods.xhrSetRequestHeader.apply(this, args);