Example output.
```
+ npm run-script selenium-daily
> selenium-daily
> npm run @selenium-test
> @selenium-test
> wdio tests/selenium/wdio.conf.js
2021-06-09T23:10:31.847Z DEBUG @wdio/config:utils: Couldn't find ts-node package, no TypeScript compiling
2021-06-09T23:10:31.851Z ERROR @wdio/config:ConfigParser: Failed loading configuration file: /src/tests/selenium/wdio.conf.js: MW_SERVER or MW_SCRIPT_PATH not defined.
See https://www.mediawiki.org/wiki/Selenium/How-to/Set_environment_variables
```
It is caused by {T283597}.
Relevant code from [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/master/tests/selenium/wdio-mediawiki/wdio-defaults.conf.js#19 | tests/selenium/wdio-mediawiki/wdio-defaults.conf.js ]].
```
if ( !process.env.MW_SERVER || !process.env.MW_SCRIPT_PATH ) {
throw new Error( 'MW_SERVER or MW_SCRIPT_PATH not defined.\nSee https://www.mediawiki.org/wiki/Selenium/How-to/Set_environment_variables\n' );
}
```
Failing jobs:
- https://integration.wikimedia.org/ci/view/selenium-daily/job/selenium-daily-beta-CentralNotice/
- https://integration.wikimedia.org/ci/view/selenium-daily/job/selenium-daily-beta-Echo/
- https://integration.wikimedia.org/ci/view/selenium-daily/job/selenium-daily-beta-Minerva/
- https://integration.wikimedia.org/ci/view/selenium-daily/job/selenium-daily-beta-Newsletter/