diff --git a/test/FunctionalTests/Microsoft.OData.Core.Tests/ScenarioTests/UriParser/FilterAndOrderByFunctionalTests.cs b/test/FunctionalTests/Microsoft.OData.Core.Tests/ScenarioTests/UriParser/FilterAndOrderByFunctionalTests.cs
index 7b9bc13ea3..16883797a9 100644
--- a/test/FunctionalTests/Microsoft.OData.Core.Tests/ScenarioTests/UriParser/FilterAndOrderByFunctionalTests.cs
+++ b/test/FunctionalTests/Microsoft.OData.Core.Tests/ScenarioTests/UriParser/FilterAndOrderByFunctionalTests.cs
@@ -2070,7 +2070,7 @@ public void FilterWithInOperationWithEnumsMemberIntegralValue(string filterOptio
         [Theory]
         [InlineData("53")]
         [InlineData("'53'")]
-        public void FilterWithInOperationWithEnumsInvalidMemberIntegralValue_ThrowsIsNotValidEnumConstantException(object integralValue)
+        public void FilterWithInOperationWithEnumsInvalidMemberIntegralValue_ThrowsIsNotValidEnumConstantException(string integralValue)
         {
             // Arrange
             string filterQuery = $"{integralValue} in FavoriteColors";