FYI @uSpike @nicoddemus @RonnyPfannschmidt @blueyed @Thisch

In #3201, the test case only seems to test --deselections of the form path/to/test_file.py::test_name. I validated that this works, but --deselections of the form path/to/test_file.py::TestClass::test_name do not work. How challenging would this be to fix?