diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 40d0fb4..fb0b834 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -1702,7 +1702,7 @@
         self.with_spaces([sys.executable, self.fname, "ab cd"])
 
 
-class ContextManagerTests(ProcessTestCase):
+class ContextManagerTests(BaseTestCase):
 
     def test_pipe(self):
         with subprocess.Popen([sys.executable, "-c",