diff --git a/scripts/_Common.psm1 b/scripts/_Common.psm1
index 1bdde4c..d849225 100644
--- a/scripts/_Common.psm1
+++ b/scripts/_Common.psm1
@@ -391,7 +391,8 @@ function Get-GuestDiagnostics {
             Write-Warning "[Diagnostics] No SshKeyPath supplied for Linux guest — skipping."
             return
         }
-        $sshOpts = @('-i', $SshKeyPath, '-o', 'StrictHostKeyChecking=accept-new',
+        $sshOpts = @('-i', $SshKeyPath, '-o', 'StrictHostKeyChecking=no',
+                     '-o', 'UserKnownHostsFile=NUL',
                      '-o', 'ConnectTimeout=10', '-o', 'BatchMode=yes')
         try {
             # Collect: journalctl errors, ps, df