One mocha test for netmonitor has been introduced in bug 1309496, but has been removed in bug 1350217. But we still have this test here: https://searchfox.org/mozilla-central/source/devtools/client/netmonitor/test/components/filter-buttons.test.js It appears that this test is left unmaintained and has broken path like: const { configureStore } = require("devtools/client/netmonitor/store"); I saw that while trying to make the console mocha test to work: Cannot find module 'devtools/client/netmonitor/store' --- at: line: 470 column: 15 file: module.js function: Function.Module._resolveFilename stack: > Function._module2.default._resolveFilename (node_modules/require-hacker/babel-transpiled-modules/require hacker.js:423:34) Object.<anonymous> (node_modules/devtools-mc-assets/assets/devtools/client/netmonitor/test/components/filter-buttons.test.js:11:28) We may need to update devtools-mc-assets after that.

green try: https://treeherder.mozilla.org/#/jobs?repo=try&revision=33d9932e3cb1e77c3bb7c07acf966d5d29229378

Comment on attachment 8952159 [details] Bug 1438531 - Remove leftovers of mocha test from netmonitor. https://reviewboard.mozilla.org/r/221406/#review227212 Looks reasonable, thanks for the clean up. Honza

Pushed by apoirot@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/737477b7b0c6 Remove leftovers of mocha test from netmonitor. r=Honza