Find every instance of a test being run

I have a test that I use at the beginning of tests throughout my project.  I recently decided it would be helpful to add a parameter to this test.  Now I'm afraid old tests will fail to run because the test they call is expecting an extra parameter.  Is there a way to find every place that my test is called so that I can change the parameters for each instance? 



Or will the old tests automatically use the default parameter? (This would be acceptible.)