e2e test that covered lines config works with tests_dir config

Author: Otto-AA

e2e_projects/mutate_only_covered_lines/tests/other/test_that_should_not_be_included.py

@@ -0,0 +1,6 @@
+from mutate_only_covered_lines import hello_mutate_only_covered_lines
+
+"""This test should be ignored, because of the tests_dir config."""
+
+def test_mutate_only_covered_lines():
+    assert hello_mutate_only_covered_lines(False) == "Hello from mutate_only_covered_lines! (false)"