Not able to run the test cases

I am not able to run test cases due to connection with mongoclient. My all test cases got failed.
Please find below screenshot. Please help

Try running the command “npm install” again.
It seems that some dependencies are missing in your project.

Try increasing the value of the connectionTimeoutMS parameter passed to the MongoClient.connect method.

The only thing I can say for certain from the error message is that the command which was supposed to instantiate the testClient object failed to do so, so I can’t be sure that connectionTimeoutMS is the cause of the problem in this case, but it seems to have been for a lot of people (me included).

I’ve just posted this: Solution to / suggestion for "cannot read property 'close' of undefined" with my thoughts on the subject, which may help to explain in more detail.

Hello, I can’t get access, please help!