only a subset of test cases are found when the karma-parallel test framework is enabled

[leochliu]

karma-parallel: https://www.npmjs.com/package/karma-parallel

// karma.conf.js
module.exports = function(config) {
  config.set({
    // NOTE: 'parallel' must be the first framework in the list
    frameworks: ['parallel', 'mocha' /* or 'jasmine' */],
  });
};