[...]

✖ JP2 output (29.6819ms)
ℹ Error: Test "JP2 Buffer to PNG Buffer" at test/unit/jp2.js:37:5 generated asynchronous activity after the test ended. This activity created the error "AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:

4 !== 3
" and would have caused the test to fail, but instead triggered an unhandledRejection event.
ℹ Error: Test "Without chroma subsampling generates larger file" at test/unit/jp2.js:68:5 generated asynchronous activity after the test ended. This activity created the error "TypeError: done is not a function" and would have caused the test to fail, but instead triggered an uncaughtException event.
ℹ Error: Test "JP2 quality" at test/unit/jp2.js:52:5 generated asynchronous activity after the test ended. This activity created the error "TypeError: done is not a function" and would have caused the test to fail, but instead triggered an uncaughtException event.

[...]

✖ failing tests:

test at test/unit/jp2.js:111:5
✖ Invalid JP2 chromaSubsampling value throws error (1.115768ms)
  AssertionError [ERR_ASSERTION]: The input did not match the regular expression /Expected one of 4:2:0, 4:4:4 but received 4:2:2 of type string/. Input:
  
  'Error: Expected one of: 4:2:0, 4:4:4 for chromaSubsampling but received 4:2:2 of type string'