diff --git a/Lib/mailcap.py b/Lib/mailcap.py
index bd0fc0981c8..ae416a8e9fb 100644
--- a/Lib/mailcap.py
+++ b/Lib/mailcap.py
@@ -251,6 +251,7 @@ def test():
         else:
             print("Executing:", command)
             sts = os.system(command)
+            sts = os.waitstatus_to_exitcode(sts)
             if sts:
                 print("Exit status:", sts)