That is not my experience in 7.3.1. And I made sure to check out, check in, etc.
I first tested with param.EmployeeType = 4 and RETURN = true.
Then I checked it out, changed param.EmployeeType = 3 and left RETURN = true.
Checked in, Actions -> Run and the result was still "Test passed!"
I do believe it is a caching issue. But I'll let those who develop the backend figure this out.