Patch out test_cwd_with_relative_arg since it fails on travis.

src/greentest/known_failures.py

@@ -184,16 +184,6 @@ if PY3:
         'FLAKY test__socket_dns.py',
     ]
 
-    if os.environ.get("TRAVIS") == "true":
-        FAILING_TESTS += [
-            # test_cwd_with_relative_executable tends to fail
-            # on Travis...it looks like the test processes are stepping
-            # on each other and messing up their temp directories
-            # Disabling this...um, disablement for now. py36 has some genuine failures
-            # that we need to be sure to catch. And maybe this is solved now?
-            #'FLAKY test_subprocess.py'
-        ]
-
     if LEAKTEST:
         FAILING_TESTS += ['FLAKY test__threadpool.py']
         # refcount problems:

src/greentest/patched_tests_setup.py

@@ -453,6 +453,17 @@ if sys.version_info[:2] >= (3, 5):
 
     ]
 
+    if os.environ.get("TRAVIS") == "true":
+        disabled_tests += [
+            # test_cwd_with_relative_executable tends to fail
+            # on Travis...it looks like the test processes are stepping
+            # on each other and messing up their temp directories
+            # that we need to be sure to catch.
+            'test_subprocess.ProcessTestCase.test_cwd_with_relative_arg',
+            'test_subprocess.ProcessTestCaseNoPoll.test_cwd_with_relative_arg',
+        ]
+
+
     if os.environ.get('GEVENT_RESOLVER') == 'ares':
         disabled_tests += [
             # These raise different errors or can't resolve