diff --git a/tests/xharness/Microsoft.DotNet.XHarness.iOS.Shared/TestImporter/ProjectDefinition.cs b/tests/xharness/Microsoft.DotNet.XHarness.iOS.Shared/TestImporter/ProjectDefinition.cs
index 7114b773477e..97e006f81e4e 100644
--- a/tests/xharness/Microsoft.DotNet.XHarness.iOS.Shared/TestImporter/ProjectDefinition.cs
+++ b/tests/xharness/Microsoft.DotNet.XHarness.iOS.Shared/TestImporter/ProjectDefinition.cs
@@ -127,7 +127,7 @@ public bool Validate ()
 					if (t.HasGenericParameters)
 						return false;
 
-					if (t.Namespace == null)
+					if (string.IsNullOrEmpty (t.Namespace))
 						return false;
 
 					if (!t.FullName.EndsWith ("Test", StringComparison.OrdinalIgnoreCase) && !t.FullName.EndsWith ("Tests", StringComparison.OrdinalIgnoreCase))