Resharper Unit Test Explorer not discovering NUnit Testcases

Hi Team,

I installed ReSharper 8.1.23.546 with Visual Studio 13 Update 5.

Resharper Unit Test explorer not able to detect the NUnit test (NUnit 2.6.2) and remain empty.

Test output shows 0 tests discovered.

Please help me in what all things I can try so that it start discovering the tests.

Thanks,

Vishal