message: Fixed the variable mismatch in the docs
diff: @@ -36,10 +36,10 @@ module.exports = async function() {
  };
  // Write global config to disk because all tests run in different contexts.
  - fs.writeFileSync(mongoFileConfigPath, JSON.stringify(mongoConfig));
  + fs.writeFileSync(globalConfigPath, JSON.stringify(mongoConfig));
  // Set reference to mongod in order to close the server during teardown.
  - global.__MONGOD__ = mongod;
  + global.__MONGOD__ = mongoServer;
  };
  ```
  