diff --git a/test/400_weave_local_test.sh b/test/400_weave_local_test.sh
index 007c10e6..34d012fc 100755
--- a/test/400_weave_local_test.sh
+++ b/test/400_weave_local_test.sh
@@ -7,7 +7,7 @@ start_suite "Run weave with --local"
 run_on $HOST1 sudo ./weave --local reset
 
 run_on $HOST1 sudo ./weave --local launch
-assert_raises "docker_on $HOST1 ps | grep weave" 0
+assert_raises "docker_on $HOST1 ps | grep weave"
 
 run_on $HOST1 sudo ./weave --local run 10.2.6.5/24 -ti --name=c1 ubuntu
 assert_raises "exec_on $HOST1 c1 ifconfig | grep ethwe"