diff --git a/stdlib/universe.bats b/stdlib/universe.bats
index 35ab76ea..0a19361e 100644
--- a/stdlib/universe.bats
+++ b/stdlib/universe.bats
@@ -82,7 +82,7 @@ setup() {
 @test "docker run: ports" {
   dagger -e docker-run-ports up
   CONTAINER=$(docker container ls -q --filter "name=daggerci-test-ports-*")
-  until docker inspect --format "{{json .State.Status }}" $CONTAINER | grep -m 1 "running"; do sleep 1 ; done
+  until docker inspect --format "{{json .State.Status }}" "$CONTAINER" | grep -m 1 "running"; do sleep 1 ; done
   run curl -f -LI http://localhost:8080
   assert_output --partial '200 OK'
   docker stop "$CONTAINER" && docker rm "$CONTAINER"