Per this comment in #215 I am attempting to bypass css checks during tests. I believe I am supposed to provide a mock exenv module during tests to accomplish this.

We're using Webpack so I am aliasing calls to the exenv module and pointing them instead to this mock:

// exenv-mock.js
const exenv = {
  canUseDOM: true,
  canUseEventListeners: true
};

export default exenv;

This did not silence the warning so I also tried providing a global ExecutionEnvironment variable that resolves the exenv-mock.js above. This also did not silence the warnings.

I am sure I am missing something simple. Any help appreciated.

EDIT
We're using karma + mocha + phantomjs for this particular test.