Expected/actual being flipped is already fixed some time ago.

I've solved this kata at many month ago, I run my code again and passed all tests:

Test Results:
  NumberTest
  Tests
✔  Test Passed
 Completed in 0.011525ms
You have passed all tests! :)

Please check your code or use Console.WriteLine() to print the input and output and look what's happening... ;-)

I've got the same problem with Ruby, its looking for 15 so it's clearly an Issue I think

Is this in C#?