diff --git a/backend/test_auth_server/__main__.py b/backend/test_auth_server/__main__.py
index 5d13b637..bf5fd576 100644
--- a/backend/test_auth_server/__main__.py
+++ b/backend/test_auth_server/__main__.py
@@ -67,4 +67,4 @@ def get(self):
 app = Flask(__name__)
 app.register_blueprint(index_bp)
 
-app.run(debug=True, host='0.0.0.0')
+app.run(debug=True, host='0.0.0.0', port=5001)
diff --git a/backend/tests.yaml b/backend/tests.yaml
index 6238d2ec..397702d8 100644
--- a/backend/tests.yaml
+++ b/backend/tests.yaml
@@ -41,7 +41,7 @@ services:
       POSTGRES_PASSWORD: test_password
       POSTGRES_DB: test_database
       API_HOST: http://api_is_here
-      AUTHENTICATION_URL: http://auth-server:5000 # Use the service name defined in Docker Compose
+      AUTHENTICATION_URL: http://auth-server:5001 # Use the service name defined in Docker Compose
       UPLOAD_URL: /data/assignments
     volumes:
       - .:/app