A computer-implemented method, computer program product, and system is provided for determining test case efficiency. In an implementation, a method may include determining each code unit executed by a test case in a test suite including a plurality of test cases, wherein a product-under-test includes a plurality of code units. The method may also include determining an execution time for the test case. The method may further include calculating an efficiency rating of the test case based upon, at least in part, a number of code units executed by the test case and the execution time for the test case.