Error occured when 'npx hardhat test' a single file

[RutaTang]

Using hardhat 2.8.2, when try to run a single file test, "Error: Cannot find module" happens.

I start a new project and error still exists, the following are exactly my steps:

1. npm init --yes
2. npm install --save-dev hardhat
3. npx hardhat, choose the "Create an advanced sample project" option
4. npx hardhat test, works good and no error
5. npx hardhat test ./test/sample-test.js, afetr test cases are completed, an error happens "Error: Cannot find module './test/sample-test.js'"

[kanej]

Hey @RutaTang, thanks for the steps, I was able to reproduce locally.

If you run npx hardhat test test/sample-test.js you will avoid the error. Why the npx hardhat test ./test/sample-test.js formulation errors is an open issue, so I am going to close this issue as a duplicate of #2220.