diff --git a/services/scripts/test_all_services.sh b/services/scripts/test_all_services.sh
--- a/services/scripts/test_all_services.sh
+++ b/services/scripts/test_all_services.sh
@@ -2,8 +2,8 @@
 
 set -e
 
-SERVICES=`./scripts/list_services.sh`
+SERVICES=$(./scripts/list_services.sh)
 
 for SERVICE in $SERVICES; do
-  ./scripts/test_service.sh $SERVICE
+  ./scripts/test_service.sh "$SERVICE"
 done