diff --git a/tests/e2e/test_traefik.py b/tests/e2e/test_traefik.py
index 2a37052..2e85062 100644
--- a/tests/e2e/test_traefik.py
+++ b/tests/e2e/test_traefik.py
@@ -88,7 +88,7 @@ def mock_webserver():
 
     # We need to recreate the container to pick up extra_hosts changes
     try:
-        subprocess.run(["docker-compose", "--env-file", "dev.env", "up", "-d", "--force-recreate", "--no-deps", "traefik"], env=env, check=True, capture_output=True, text=True)
+        subprocess.run(["docker-compose", "--env-file", "preprod.env", "up", "-d", "--force-recreate", "--no-deps", "traefik"], env=env, check=True, capture_output=True, text=True)
     except subprocess.CalledProcessError as e:
         print(f"Docker Compose STDOUT: {e.stdout}")
         print(f"Docker Compose STDERR: {e.stderr}")
@@ -104,7 +104,7 @@ def mock_webserver():
         subprocess.run(["docker", "stop", mock["name"]], capture_output=True)
     
     # Restore Traefik to default (optional)
-    subprocess.run(["docker-compose", "--env-file", "dev.env", "up", "-d", "--force-recreate", "--no-deps", "traefik"], check=True)
+    subprocess.run(["docker-compose", "--env-file", "preprod.env", "up", "-d", "--force-recreate", "--no-deps", "traefik"], check=True)
 
 def test_whoami_http_reachable():
     """Verify that the whoami service is reachable via HTTP."""