diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 58042df7a344bde74f815d9f50a53a69d395f2bd..f9d782f57f040bcc72833151d572fec83eb05165 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -44,7 +44,7 @@ build:transpile:
 tests:
   stage: tests
   script:
-    - echo "{'dn':'dn', 'passwd':'passwd'}" >> ldap_credentials.json
+    - echo '{"dn":"dn", "passwd":"passwd"}' >> ldap_credentials.json
     - npm i
     - npm run test