The Problem

I was setting up continuous integration using CircleCI and Karma tests for Angular on Heroku.

The tests were working on my local host, but Karma was not found on CircleCI:

Uh-oh, some tests have failed!
Failing command: npm test
Exit code: 1
Output:
> karma start karma.conf.js

sh: 1: karma: not found
npm ERR! Test failed. See above for more details.
((npm :test)) returned exit code 1

My Solution

To resolve this issue, either create or edit your circle.yml config file. Add dependencies using npm to install karma-cli globally, and use Bower to install Angular, as shown below:

dependencies:
  pre:
    - npm install -g karma-cli bower
    - bower install
  cache_directories:
    - ~/nvm

This configuration should help you run your Karma tests successfully on CircleCI.