diff --git a/tests/backend.sh b/tests/backend.sh
index f5f3242..75c9b15 100644
--- a/tests/backend.sh
+++ b/tests/backend.sh
@@ -37,5 +37,5 @@ assert_good_status
 sleep 5
 
 curl $ARGS -s http://$HOST/passes
-test [ $(curl $ARGS -s http://$HOST/passes | jq '.result.[0]') != "null" ]
+test "$(curl $ARGS -s http://$HOST/passes | jq '.result.[0]')" != "null"
 assert_good_status