• QUnit version: 2.10.0
• What environment are you running QUnit in? (e.g., browser, Node): node 12.16.0
• How are you running QUnit? (e.g., script, testem, Grunt): yarn script
• Env: Mac OS 10.15.5

If QUnit.begin returns a rejected promise, I would expect the rejection error to be shown to the user, but it is not. You get a Error: Process exited before tests finished running error with no error info.

Reproduction repo: https://github.com/asakusuma/qunit-begin-issue