diff --git a/src/libraries/Common/tests/System/Net/WebSockets/WebSocketCreateTest.cs b/src/libraries/Common/tests/System/Net/WebSockets/WebSocketCreateTest.cs
index b48bfb0c183cef..f22a8add7d96ae 100644
--- a/src/libraries/Common/tests/System/Net/WebSockets/WebSocketCreateTest.cs
+++ b/src/libraries/Common/tests/System/Net/WebSockets/WebSocketCreateTest.cs
@@ -101,6 +101,7 @@ public async Task ReceiveAsync_UTF8SplitAcrossMultipleBuffers_ValidDataReceived(
         }
 
         [Theory]
+        [PlatformSpecific(~TestPlatforms.Browser)] // System.Net.Sockets is not supported on this platform.
         [ActiveIssue("https://github.com/dotnet/runtime/issues/34690", TestPlatforms.Windows, TargetFrameworkMonikers.Netcoreapp, TestRuntimes.Mono)]
         [InlineData(0b_1000_0001, 0b_0_000_0001, false)] // fin + text, no mask + length == 1
         [InlineData(0b_1100_0001, 0b_0_000_0001, true)] // fin + rsv1 + text, no mask + length == 1
@@ -147,6 +148,7 @@ public async Task ReceiveAsync_InvalidFrameHeader_AbortsAndThrowsException(byte
         }
 
         [Fact]
+        [PlatformSpecific(~TestPlatforms.Browser)] // System.Net.Sockets is not supported on this platform.
         [ActiveIssue("https://github.com/dotnet/runtime/issues/34690", TestPlatforms.Windows, TargetFrameworkMonikers.Netcoreapp, TestRuntimes.Mono)]
         public async Task ReceiveAsync_ServerSplitHeader_ValidDataReceived()
         {
diff --git a/src/libraries/System.Net.WebSockets.WebSocketProtocol/tests/WebSocketProtocolTests.cs b/src/libraries/System.Net.WebSockets.WebSocketProtocol/tests/WebSocketProtocolTests.cs
index 7266ac96e287ca..1d8aecbda9db2f 100644
--- a/src/libraries/System.Net.WebSockets.WebSocketProtocol/tests/WebSocketProtocolTests.cs
+++ b/src/libraries/System.Net.WebSockets.WebSocketProtocol/tests/WebSocketProtocolTests.cs
@@ -6,7 +6,6 @@
 
 namespace System.Net.WebSockets.Tests
 {
-    [ActiveIssue("https://github.com/dotnet/runtime/issues/38807", TestPlatforms.Browser)]
     public sealed class WebSocketProtocolCreateTests : WebSocketCreateTest
     {
         protected override WebSocket CreateFromStream(Stream stream, bool isServer, string subProtocol, TimeSpan keepAliveInterval) =>
diff --git a/src/libraries/System.Net.WebSockets/tests/WebSocketTests.cs b/src/libraries/System.Net.WebSockets/tests/WebSocketTests.cs
index 892404f040d94a..ad738a00ec8645 100644
--- a/src/libraries/System.Net.WebSockets/tests/WebSocketTests.cs
+++ b/src/libraries/System.Net.WebSockets/tests/WebSocketTests.cs
@@ -6,7 +6,6 @@
 
 namespace System.Net.WebSockets.Tests
 {
-    [ActiveIssue("https://github.com/dotnet/runtime/issues/38807", TestPlatforms.Browser)]
     public sealed class WebSocketTests : WebSocketCreateTest
     {
         protected override WebSocket CreateFromStream(Stream stream, bool isServer, string subProtocol, TimeSpan keepAliveInterval) =>