Followup-For: Bug #969611 node-setimmediate has Suggests: libjs-mocha (>= 3), but that package no longer exists after stretch.
A possible replacement is the virtual, versioned node-mocha (= 8.2.1) provided by mocha (8.2.1+ds1+~cs29.4.27-3) which ships /usr/share/nodejs/mocha/lib/mocha.js /usr/share/nodejs/mocha/mocha.css Andreas
