diff --git a/actions_bootstrap.ps1 b/actions_bootstrap.ps1
index ab0f6e0..d4a4966 100644
--- a/actions_bootstrap.ps1
+++ b/actions_bootstrap.ps1
@@ -46,7 +46,7 @@ foreach ($module in $modulesToInstall) {
         ErrorAction     = 'Stop'
     }
     try {
-        if ($module.ModuleName -eq 'Pester' -and $IsWindows) {
+        if ($module.ModuleName -eq 'Pester' -and ($IsWindows -or $PSVersionTable.PSVersion -ge [version]'5.1')) {
             # special case for Pester certificate mismatch with older Pester versions - https://github.com/pester/Pester/issues/2389
             # this only affects windows builds
             Install-Module @installSplat -SkipPublisherCheck