1 files changed, 7 insertions, 1 deletions
diff --git a/Lib/test/test_wait4.py b/Lib/test/test_wait4.py
index cdcd0604b7..352c11aade 100644
--- a/Lib/test/test_wait4.py
+++ b/Lib/test/test_wait4.py
@@ -3,6 +3,7 @@
 
 import os
 import time
+import sys
 from test.fork_wait import ForkWait
 from test.support import run_unittest, reap_children, get_attribute
 
@@ -13,10 +14,15 @@ get_attribute(os, 'wait4')
 
 class Wait4Test(ForkWait):
     def wait_impl(self, cpid):
+        option = os.WNOHANG
+        if sys.platform.startswith('aix'):
+            # Issue #11185: wait4 is broken on AIX and will always return 0
+            # with WNOHANG.
+            option = 0
         for i in range(10):
             # wait4() shouldn't hang, but some of the buildbots seem to hang
             # in the forking tests.  This is an attempt to fix the problem.
-            spid, status, rusage = os.wait4(cpid, os.WNOHANG)
+            spid, status, rusage = os.wait4(cpid, option)
             if spid == cpid:
                 break
             time.sleep(1.0)