Index: Lib/test/test_zipimport_support.py
===================================================================
--- Lib/test/test_zipimport_support.py	(revision 76700)
+++ Lib/test/test_zipimport_support.py	(working copy)
@@ -215,6 +215,7 @@
             p = spawn_python(zip_name)
             p.stdin.write(b'l\n')
             data = kill_python(p)
+            p.wait()    # prevent some fuzzy refleaks
             self.assertTrue(run_name.encode('utf-8') in data)