Defective unit tests always show a successful notification when tested on device in XCode 6 beta swift

Test modules always show a successful start in workplace notification when running on a device in XCode 6 beta 6 in Swift.

How to recreate:

• Create a new Swift-enabled iOS app project.
• Go to an existing test and change it to XCTAssert(false)
  
  for it to work.
• Run tests on the device - the "Test Succeeded" message appears on the screen.
• Run the test on the emulator - it will show the "Test Failed" message.

Update

• When testing on the device, there are test error messages in the output window. But the desktop notification says "Test Succeeded".
• When I test the device and set a breakpoint in the test method, it stops there.