How come test failed although console says correct?

I"m working on ES6 lessons using Import and Export. I’ve skipped over lessons which I can’t pass test.

For this example on “Import a Default Export”:

My code:

import subtract from 'math_functions'


In case the image is not viewable.
The console says: 
// running test
Properly imports export default method.
// tests completed

but the test failed on : Properly imports export default method.

When I add `./` to the file, the console gives error.

**I figured out my mistake. I need double quotes and semi-colon.**

import subtract from “math_functions”;

The test is being picky. Try using double quotes instead of single quotes.