diff --git a/docker-compose.yml b/docker-compose.yml
index 941446d..9318a81 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -29,6 +29,7 @@ services:
       SIMPLETEST_BASE_URL: "http://app:8888"
       SIMPLETEST_DB: "mysql://drupal:drupal@db:3306/drupal"
       BROWSERTEST_OUTPUT_BASE_URL: "https://${DRUPAL_HOSTNAME}"
+      BROWSERTEST_OUTPUT_DIRECTORY: "/app/public/sites/default/files/simpletest"
       DRUPAL_VARNISH_HOST: "${COMPOSE_PROJECT_NAME}-varnish"
       DRUPAL_VARNISH_PORT: 6081
       REDIS_HOST: redis