There is a mutation testinga mutation testing that evaluates and measures the suitability and quality of the test.
We can use this to evaluate "the test" itself.
In brief, We can evaluate our test (e.g. TestA) by testing TestA can find the difference between the code and its mutation codes(very similar but slightly different code with original code).
If TestA cannot find the difference between the code and its mutation codes, It means that the TestA has too rough regulations to test the original code.