Fix transient refleak in test_popen2.
diff --git a/Lib/test/test_popen2.py b/Lib/test/test_popen2.py
index 1383c62..715858e 100644
--- a/Lib/test/test_popen2.py
+++ b/Lib/test/test_popen2.py
@@ -50,7 +50,13 @@
for inst in popen2._active:
inst.wait()
popen2._cleanup()
- self.assertFalse(popen2._active, "_active not empty")
+ self.assertFalse(popen2._active, "popen2._active not empty")
+ # The os.popen*() API delegates to the subprocess module (on Unix)
+ import subprocess
+ for inst in subprocess._active:
+ inst.wait()
+ subprocess._cleanup()
+ self.assertFalse(subprocess._active, "subprocess._active not empty")
reap_children()
def validate_output(self, teststr, expected_out, r, w, e=None):