diff --git a/services/scripts/test_service.sh b/services/scripts/test_service.sh
index 25828b6eb..bc82cdf6b 100755
--- a/services/scripts/test_service.sh
+++ b/services/scripts/test_service.sh
@@ -1,19 +1,19 @@
 #!/usr/bin/env bash
 
 set -e
 
 SERVICES=$(./scripts/list_services.sh)
 SERVICE=$(grep "$1" <<< echo "$SERVICES") || echo "No such service: $1"
 
-if [ "$SERVICE" != "$1" ]; then
+if [[ "$SERVICE" != "$1" ]]; then
   echo "Expected one of these:"
   echo "$SERVICES"
   exit 1;
 fi;
 
 export COMM_TEST_SERVICES=1
 
 echo "${SERVICE} service will be tested"
 
 docker-compose build "${SERVICE}"-server
 docker-compose run "${SERVICE}"-server