diff --git a/src/libraries/System.Runtime.InteropServices/tests/System/Runtime/InteropServices/Marshal/GetObjectForNativeVariantTests.cs b/src/libraries/System.Runtime.InteropServices/tests/System/Runtime/InteropServices/Marshal/GetObjectForNativeVariantTests.cs
index d8a6bc398f5e0..4da69030fdead 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/System/Runtime/InteropServices/Marshal/GetObjectForNativeVariantTests.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/System/Runtime/InteropServices/Marshal/GetObjectForNativeVariantTests.cs
@@ -351,8 +351,8 @@ public static IEnumerable<object[]> GetObjectForNativeVariant_InvalidVarType_Tes
             yield return new object[] { 128 };
             yield return new object[] { 4094 };
             yield return new object[] { VT_BSTR_BLOB };
-            yield return new object[] { VT_ILLEGALMASKED };
-            yield return new object[] { VT_TYPEMASK };
+            Assert.Equal(VT_BSTR_BLOB, VT_ILLEGALMASKED);
+            Assert.Equal(VT_BSTR_BLOB, VT_TYPEMASK);
             yield return new object[] { VT_VECTOR };
             yield return new object[] { 4097 };
             yield return new object[] { 8191 };