diff --git a/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs b/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs
index fbd5df9afdde75..77496e80d24c7c 100644
--- a/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs
+++ b/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs
@@ -467,13 +467,10 @@ private static bool GetTls13Support()
         private static bool GetIsRunningOnMonoInterpreter()
         {
 #if NETCOREAPP
-            if (IsBrowser)
-                return RuntimeFeature.IsDynamicCodeSupported;
+            return IsMonoRuntime && RuntimeFeature.IsDynamicCodeSupported && !RuntimeFeature.IsDynamicCodeCompiled;
+#else
+            return false;
 #endif
-            // This is a temporary solution because mono does not support interpreter detection
-            // within the runtime.
-            var val = Environment.GetEnvironmentVariable("MONO_ENV_OPTIONS");
-            return (val != null && val.Contains("--interpreter"));
         }
 
         private static bool GetIsBrowserDomSupported()
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 3288e59a9e1b5f..c4f5c48734ebf5 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -170,7 +170,6 @@
     <ProjectExclusions Include="$(RepoRoot)/src/tests/FunctionalTests/tvOS/Simulator/AOT/tvOS.Simulator.Aot.Test.csproj" />
     <!-- Crashes randomly during test runs https://github.com/dotnet/runtime/issues/52460 -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Threading.Tasks\tests\System.Threading.Tasks.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Threading.Tasks.Dataflow\tests\System.Threading.Tasks.Dataflow.Tests.csproj" />
 
     <!-- Crash https://github.com/dotnet/runtime/issues/56085 -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json/tests/System.Text.Json.SourceGeneration.Tests/System.Text.Json.SourceGeneration.Roslyn3.11.Tests.csproj" />