diff --git a/tests/routings/authenticate.test.js b/tests/routings/authenticate.test.js
index 941ea16..e0fd462 100644
--- a/tests/routings/authenticate.test.js
+++ b/tests/routings/authenticate.test.js
@@ -17,7 +17,7 @@ beforeAll(() => {
             }
         })
         writeFileSync('public.pem', publicKey)
-        writeFileSync('private.pem', privateKey)
+        writeFileSync('private.key', privateKey)
     }
 
     config.database.url = 'mongodb://setup-database:27017/yggdrasil?readPreference=primary&appname=MongoDB%20Compass&directConnection=true&ssl=false'