diff --git a/src/libraries/System.Diagnostics.DiagnosticSource/tests/TestWithConfigSwitches/ActivityTests.cs b/src/libraries/System.Diagnostics.DiagnosticSource/tests/TestWithConfigSwitches/ActivityTests.cs
index 80b7218397a8f8..cb848a9c1cb408 100644
--- a/src/libraries/System.Diagnostics.DiagnosticSource/tests/TestWithConfigSwitches/ActivityTests.cs
+++ b/src/libraries/System.Diagnostics.DiagnosticSource/tests/TestWithConfigSwitches/ActivityTests.cs
@@ -32,7 +32,7 @@ public void ActivityIdNonHierarchicalOverflow()
             Assert.DoesNotContain('#', activity.Id);
         }
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsThreadingSupported))]
         public void IdGenerationInternalParent()
         {
             var parent = new Activity("parent");