diff --git a/test/units/playbook/test_play_context.py b/test/units/playbook/test_play_context.py
index 109d06934f..1ffd79fbe6 100644
--- a/test/units/playbook/test_play_context.py
+++ b/test/units/playbook/test_play_context.py
@@ -157,7 +157,7 @@ class TestPlayContext(unittest.TestCase):
 
         play_context.become_method = 'pbrun'
         cmd = play_context.make_become_cmd(cmd=default_cmd, executable="/bin/bash")
-        self.assertEqual(cmd, """%s -b %s -u %s 'echo %s; %s'""" % (pbrun_exe, pbrun_flags, play_context.become_user, play_context.success_key, default_cmd))
+        self.assertEqual(cmd, """%s %s -u %s 'echo %s; %s'""" % (pbrun_exe, pbrun_flags, play_context.become_user, play_context.success_key, default_cmd))
 
         play_context.become_method = 'pfexec'
         cmd = play_context.make_become_cmd(cmd=default_cmd, executable="/bin/bash")