diff --git a/docker-compose.yaml b/docker-compose.yaml
index a4c8336d60d52bd0084920af8c860d2de8931bd0..de3604014fe103d32e1b112c483682867820f839 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -35,9 +35,12 @@ services:
     container_name: backendcomposedtt
     image: hftstuttgart/dta-backend:latest
     user: "${UID}:${GID}"
+    environment:
+      - HOST_TEST_DIR=/tmp/dta-tests
+      - CONTAINER_TEST_DIR=/tmp/dta-tests
     volumes: 
       - /var/run/docker.sock:/var/run/docker.sock
-      - '/tmp/dta-tests:/tmp/dta-tests'
+      - '${HOST_TEST_DIR}:${CONTAINER_TEST_DIR}'
 volumes:
   mariadb_data_dtt:
     driver: local