diff --git a/qa/tasks/stretch_cluster.py b/qa/tasks/stretch_cluster.py
index 0038b9d4dcb..086a72c8414 100644
--- a/qa/tasks/stretch_cluster.py
+++ b/qa/tasks/stretch_cluster.py
@@ -678,7 +678,7 @@ class TestStretchCluster(MgrTestCase):
 
         # Fail over osds in DC2 completely expects PGs to be 100% inactive
         self._fail_over_all_osds_in_dc('dc2')
-        self.wait_until_true_and_hold(lambda: self._pg_all_unavailable,
+        self.wait_until_true_and_hold(lambda: self._pg_all_unavailable(),
                                       timeout=self.RECOVERY_PERIOD,
                                       success_hold_time=self.SUCCESS_HOLD_TIME)