What kind of problem ?
You need to explain what you are trying to do and what is failing.
Your screenshot is showing the default unit test class created when setting up a unit test - you may consider reading about unit testing to understand what's going on.
Session 409 "Testing in Xcode 5" from the WWDC 2013 videos introduces this subject - they can all be found on Apples developer site:
The most recent guide about unit testing that I can find is:
this is out of date (it applies to Xcode 4) but still relevant, the main difference (from what I understand) is that Xcode 5 starts you out with a test target and that test functions are now named as XCTxxx() instead of STxxx() as the underlying test system has been changed from previous sentest/ocunit/octest to xctest.