We should rename test files in test/**/*.js to test/**/*.spec.js. This would help with quickly opening files in an IDE or text editor. I often open the wrong runnable.js:

Renaming the test files will eliminate potential confusion here and improve DX.

However, not everything in the glob test/**/*.js is a test.

Fixtures (e.g. test/integration/fixtures/**/*.js and others) should not be renamed to *.spec.js. Ideally we could settle on a convention (*.fixture.js?) and eliminate the weirdo filenames with umpteen extensions; multiple.done.before.js could be multiple-done-before.fixture.js, for example.

Mostly I'm looking for consistency in recognizing that I'm about to open a source file, a test file, a fixture, or whatever else.