Substitute subtest of Python 2.7

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/run/test_patma.py b/tests/run/test_patma.py
index 240dbf0d3..61ac6957f 100644
--- a/tests/run/test_patma.py
+++ b/tests/run/test_patma.py
@@ -59,6 +59,16 @@ else:
 #  except for one test that seems misplaced in CPython (which is below)
 
 class TestTracing(unittest.TestCase):
+    if sys.version_info < (3, 4):
+        class SubTestClass(object):
+            def __enter__(self):
+                return self
+            def __exit__(self, exc_type, exc_value, traceback):
+                return
+            def __call__(self, *args):
+                return self
+        subTest = SubTestClass()
+
     def test_parser_deeply_nested_patterns(self):
         # Deeply nested patterns can cause exponential backtracking when parsing.
         # See CPython gh-93671 for more information.