It seems like you call parent on a different method (expectExceptionMessage() instead of expectException()). Are you sure this is correct? If so, you might want to change this to $this->expectExceptionMessage().
This check looks for a call to a parent method whose name is different than
the method from which it is called.
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.