Hi, I have completed the test class for the Test Automation logic  challenge. Both my trigger and helper class are getting 100% covered. But the challenge is not complted due to the following error:

Challenge Not yet complete... here's what's wrong: 
The 'MaintenanceRequestHelper' class did not achieve 100% code coverage via your test methods. Make sure that you chose 'Run All' tests in the Developer Console at least once before attempting to verify this challenge.

Can some one point me in the right direction to move forward with the badge completion. TIA !!!