I've seen this a few times.
Describing Web cmdlets tests using the cmdlet's aliases
[-] Error occurred in Describe block 15.39s
WebListener did not start before the timeout was reached.
At C:\projects\powershell\test\tools\Modules\WebListener\WebListener.psm1:91 char:13
Describing Write-Debug tests
+
I've seen this a few times.
Steps to reproduce
Run Windows CI Tests
Expected behavior
No failures
Actual behavior
https://ci.appveyor.com/project/PowerShell/powershell/build/6.0.0-7706#L2212
Environment data