`Get-CimInstance` (non failing) error when running Pester not as Administrator

[lemeurherve]

Checklist

• Issue has a meaningful title
• I have searched the existing issues. See all issues
• I have tested using the latest version of Pester. See Installation and update guide.

What is the issue?

Since we switched our CI Windows agents to not run as Administrator, when running tests a (non-failing) error is shown in Pester output at the end of each test suite.

Ex:

[2026-02-21T16:06:56.254Z] Running tests from 'sshAgent.Tests.ps1'
[2026-02-21T16:07:03.675Z] Describing [nanoserver-ltsc2019-jdk17] image has setup-sshd.ps1 in the correct location
[2026-02-21T16:07:04.806Z]   [+] has setup-sshd.ps1 in C:/ProgramData/Jenkins  1.04s (912ms|125ms)
[2026-02-21T16:07:11.726Z] 
[2026-02-21T16:07:11.726Z] Describing [nanoserver-ltsc2019-jdk17] image has no pre-existing SSH host keys
[2026-02-21T16:07:12.462Z]   [+] has has no SSH host key present in C:\ProgramData\ssh  772ms (762ms|10ms)
[2026-02-21T16:07:12.881Z] 
[2026-02-21T16:07:12.881Z] Describing [nanoserver-ltsc2019-jdk17] checking image metadata
[2026-02-21T16:07:13.002Z]   [+] has correct volumes  130ms (117ms|13ms)
[2026-02-21T16:07:13.223Z]   [+] has the source GitHub URL in docker metadata  121ms (115ms|6ms)
[2026-02-21T16:07:19.416Z] 
[2026-02-21T16:07:19.416Z] Describing [nanoserver-ltsc2019-jdk17] image has correct version of java and git-lfs installed and in the PATH
[2026-02-21T16:07:21.052Z]   [+] has java installed and in the path  1.58s (1.57s|10ms)
[2026-02-21T16:07:22.091Z]   [+] has git-lfs (and thus git) installed and in the path  1.06s (1.06s|7ms)
[2026-02-21T16:07:28.899Z] 
[2026-02-21T16:07:28.899Z] Describing [nanoserver-ltsc2019-jdk17] create agent container with pubkey as argument
[2026-02-21T16:07:32.000Z]   [+] runs commands via ssh  3.09s (3.08s|11ms)
[2026-02-21T16:07:38.727Z] 
[2026-02-21T16:07:38.727Z] Describing [nanoserver-ltsc2019-jdk17] create agent container with pubkey as envvar
[2026-02-21T16:07:41.388Z]   [+] runs commands via ssh  2.67s (2.66s|14ms)
[2026-02-21T16:07:47.993Z] 
[2026-02-21T16:07:47.993Z] Describing [nanoserver-ltsc2019-jdk17] create agent container like docker-plugin with '/usr/sbin/sshd -D -p 22' as argument
[2026-02-21T16:07:50.655Z]   [+] runs commands via ssh  2.61s (2.6s|9ms)
[2026-02-21T16:07:51.078Z] 
[2026-02-21T16:07:51.079Z] Describing [nanoserver-ltsc2019-jdk17] image can be built
[2026-02-21T16:09:26.544Z]   [+] builds image  95.42s (95.4s|12ms)
[2026-02-21T16:09:26.544Z] 
[2026-02-21T16:09:26.544Z] Describing [nanoserver-ltsc2019-jdk17] image can be built with custom build args
[2026-02-21T16:09:51.886Z]   [+] uses build args correctly  25.28s (25.27s|13ms)
[2026-02-21T16:09:53.015Z] Tests completed in 177.6s
[2026-02-21T16:09:53.016Z] Tests Passed: 11,  Failed: 0,  Skipped: 0,  Inconclusive: 0, NotRun: 0
[2026-02-21T16:09:58.707Z] powershell.exe : Get-CimInstance : Access denied 
[2026-02-21T16:09:58.707Z] At Z:\agent\workspace\ackaging_docker-ssh-agent_PR-611@tmp\durable-f6c57dcc\powershellWrapper.ps1:3 char:1
[2026-02-21T16:09:58.707Z] + & powershell -NoProfile -NonInteractive -ExecutionPolicy Bypass -Comm ...
[2026-02-21T16:09:58.707Z] + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[2026-02-21T16:09:58.707Z]     + CategoryInfo          : NotSpecified: (Get-CimInstance : Access denied :String) [], RemoteException
[2026-02-21T16:09:58.707Z]     + FullyQualifiedErrorId : NativeCommandError
[2026-02-21T16:09:58.707Z]  
[2026-02-21T16:09:58.707Z] At Z:\Users\jenkins\Documents\WindowsPowerShell\Modules\Pester\5.7.1\Pester.psm1:18443 char:33
[2026-02-21T16:09:58.707Z] + ... ormation = (& $SafeCommands['Get-CimInstance'] Win32_OperatingSystem) ...
[2026-02-21T16:09:58.707Z] +                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[2026-02-21T16:09:58.707Z]     + CategoryInfo          : PermissionDenied: (root\cimv2:Win32_OperatingSystem:String) [Get-CimInstance], CimExcept 
[2026-02-21T16:09:58.707Z]    ion
[2026-02-21T16:09:58.707Z]     + FullyQualifiedErrorId : HRESULT 0x80041003,Microsoft.Management.Infrastructure.CimCmdlets.GetCimInstanceCommand
[2026-02-21T16:09:58.708Z]  
[2026-02-21T16:09:58.828Z] There were 11 passed tests in jenkins/ssh-agent:nanoserver-ltsc2019-jdk17

Expected Behavior

No error message about Get-CimInstace is shown in Pester output.

Steps To Reproduce

Execute tests from a user not Administrator.

Describe your environment

Pester version: 5.7.1
PowerShell version: 5
OS name: "windows server 2025", version: "10.0", arch: "amd64"

Possible Solution?

Hide those error logs or don't try to execute Get-CimInstance if not running as Administrator.

Note

Opening this issue for awareness, no urgency our tests are still working as intended.

Related:

• chore(windows/make.ps1) ensure Pester is only installed as user (instead of system) jenkinsci/docker#2236