fix

pester-extensions.psm1

@@ -12,8 +12,10 @@ function Get-CommandResult {
         [switch] $Multiline
     )
     # CMD trick to suppress and show error output because some commands write to stderr (for example, "python --version")
-    if ($IsWindows) {
+    If ($IsWindows) {
         [string[]]$output = & $env:comspec /c "$Command 2>&1"
+    } else {
+        $output = & bash -c "$Command 2>&1"
     }
     $exitCode = $LASTEXITCODE