diff --git a/tests/test_lightningd.py b/tests/test_lightningd.py
index d36d2737f..0fb652818 100644
--- a/tests/test_lightningd.py
+++ b/tests/test_lightningd.py
@@ -1183,7 +1183,7 @@ class LightningDTests(BaseLightningDTests):
 
         def try_pay():
             try:
-                l1.rpc.sendpay(to_json(route), rhash, async=False)
+                l1.rpc.sendpay(to_json(route), rhash)
                 q.put(None)
             except Exception as err:
                 q.put(err)