Getting XCode to report a test case failure in a calling class

Question

If I write a helper method for test case:

- (void)testCallsHelper
{
    [self helper]; // Can I get Xcode to highlight the failure here?
}

- (void)helper
{
    STFail(@"Fail"); // Xcode highlights failure here
}

This would be handy because it's quicker to use Xcode highlighting to jump to where an error is occurring and its also handy to put repeated code into helper method.