diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 774e797f02e..e4d60f88042 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -4146,7 +4146,7 @@ class TestSemaphoreTracker(unittest.TestCase):
         '''
         r, w = os.pipe()
         p = subprocess.Popen([sys.executable,
-                             '-c', cmd % (w, w)],
+                             '-E', '-c', cmd % (w, w)],
                              pass_fds=[w],
                              stderr=subprocess.PIPE)
         os.close(w)