Running it on its own does no good, just makes it take longer.

src/greentest/2.7pypy/test_threading.py

 # Very rudimentary test of threading module
-
+print("GEVENT: Begin import")
 import test.test_support
 from test.test_support import verbose, cpython_only
 from test.script_helper import assert_python_ok
@@ -941,4 +941,5 @@ def test_main():
                                    )
 
 if __name__ == "__main__":
+    print("GEVENT: Begin main")
     test_main()

src/greentest/greentest/testrunner.py

@@ -31,7 +31,6 @@ if RUNNING_ON_CI:
 RUN_ALONE = [
     'test__threadpool.py',
     'test__examples.py',
-    'test_threading.py',
 ]
 
 # tests that can't be run when coverage is enabled