diff --git a/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs b/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs
index 33392864210a8..912f356c5d658 100644
--- a/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs
+++ b/src/libraries/Common/tests/System/Net/Http/HttpClientHandlerTest.cs
@@ -577,6 +577,7 @@ public static IEnumerable<object[]> GetAsync_ManyDifferentResponseHeaders_Parsed
 
         [Theory]
         [MemberData(nameof(GetAsync_ManyDifferentResponseHeaders_ParsedCorrectly_MemberData))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/54655", TestPlatforms.Browser)]
         public async Task GetAsync_ManyDifferentResponseHeaders_ParsedCorrectly(string newline, string fold, bool dribble)
         {
             if (LoopbackServerFactory.Version >= HttpVersion20.Value)
diff --git a/src/libraries/System.Net.WebSockets.Client/tests/SendReceiveTest.cs b/src/libraries/System.Net.WebSockets.Client/tests/SendReceiveTest.cs
index 6266f01e8ede5..bc70d2a4fdf55 100644
--- a/src/libraries/System.Net.WebSockets.Client/tests/SendReceiveTest.cs
+++ b/src/libraries/System.Net.WebSockets.Client/tests/SendReceiveTest.cs
@@ -217,6 +217,7 @@ public async Task SendAsync_MultipleOutstandingSendOperations_Throws(Uri server)
 
         [OuterLoop("Uses external servers", typeof(PlatformDetection), nameof(PlatformDetection.LocalEchoServerIsNotAvailable))]
         [ConditionalTheory(nameof(WebSocketsSupported)), MemberData(nameof(EchoServers))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/53957", TestPlatforms.Browser)]
         public async Task ReceiveAsync_MultipleOutstandingReceiveOperations_Throws(Uri server)
         {
             using (ClientWebSocket cws = await WebSocketHelper.GetConnectedWebSocket(server, TimeOutMilliseconds, _output))
@@ -320,6 +321,7 @@ await SendAsync(
 
         [OuterLoop("Uses external servers", typeof(PlatformDetection), nameof(PlatformDetection.LocalEchoServerIsNotAvailable))]
         [ConditionalTheory(nameof(WebSocketsSupported)), MemberData(nameof(EchoServers))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/53957", TestPlatforms.Browser)]
         public async Task SendReceive_VaryingLengthBuffers_Success(Uri server)
         {
             using (ClientWebSocket cws = await WebSocketHelper.GetConnectedWebSocket(server, TimeOutMilliseconds, _output))