diff --git a/src/libraries/System.Net.Requests/tests/AssemblyInfo.cs b/src/libraries/System.Net.Requests/tests/AssemblyInfo.cs
index f124e7754138ac..6c655e4a108e08 100644
--- a/src/libraries/System.Net.Requests/tests/AssemblyInfo.cs
+++ b/src/libraries/System.Net.Requests/tests/AssemblyInfo.cs
@@ -5,3 +5,4 @@
 using Xunit;
 
 [assembly: ActiveIssue("https://github.com/dotnet/runtime/issues/34690", TestPlatforms.Windows, TargetFrameworkMonikers.Netcoreapp, TestRuntimes.Mono)]
+[assembly: ActiveIssue("https://github.com/dotnet/runtime/issues/38283", TestPlatforms.Browser)]
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 3cc20c7573109b..a183c3cedaf565 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -26,13 +26,10 @@
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Http.Json\tests\FunctionalTests\System.Net.Http.Json.Functional.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Mail\tests\Functional\System.Net.Mail.Functional.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.NetworkInformation\tests\FunctionalTests\System.Net.NetworkInformation.Functional.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Requests\tests\System.Net.Requests.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.WebClient\tests\System.Net.WebClient.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.WebSockets\tests\System.Net.WebSockets.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.WebSockets.WebSocketProtocol\tests\System.Net.WebSockets.WebSocketProtocol.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Threading.Tasks.Dataflow\tests\System.Threading.Tasks.Dataflow.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Threading.Tasks.Extensions\tests\System.Threading.Tasks.Extensions.Tests.csproj" />
     <!-- Builds currently do not pass -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Common\tests\Common.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.Configuration.FileExtensions\tests\Microsoft.Extensions.Configuration.FileExtensions.Tests.csproj" />