diff --git a/src/libraries/System.Linq.Parallel/tests/AssemblyInfo.cs b/src/libraries/System.Linq.Parallel/tests/AssemblyInfo.cs
new file mode 100644
index 0000000000000..80dc539435b6f
--- /dev/null
+++ b/src/libraries/System.Linq.Parallel/tests/AssemblyInfo.cs
@@ -0,0 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using Xunit;
+
+[assembly: ActiveIssue("https://github.com/dotnet/runtime/issues/38942", typeof(PlatformDetection), nameof(PlatformDetection.IsMonoInterpreter), nameof(PlatformDetection.IsBrowser))]
diff --git a/src/libraries/System.Linq.Parallel/tests/System.Linq.Parallel.Tests.csproj b/src/libraries/System.Linq.Parallel/tests/System.Linq.Parallel.Tests.csproj
index 8b327c062a3e8..861559531ed98 100644
--- a/src/libraries/System.Linq.Parallel/tests/System.Linq.Parallel.Tests.csproj
+++ b/src/libraries/System.Linq.Parallel/tests/System.Linq.Parallel.Tests.csproj
@@ -4,6 +4,7 @@
     <TargetFrameworks>$(NetCoreAppCurrent)</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="AssemblyInfo.cs" />
     <Compile Include="$(CommonTestPath)System\Diagnostics\Tracing\TestEventListener.cs"
              Link="Common\System\Diagnostics\Tracing\TestEventListener.cs" />
     <Compile Include="$(CommonTestPath)System\ShouldNotBeInvokedException.cs"