--- win_unittest.py
+++ win_unittest.py
@@ -225,17 +225,17 @@ config = {
             'architectures': ['32bit', '64bit'],
             'halt_on_failure': True,
             'enabled': ADJUST_MOUSE_AND_SCREEN
         },
         {
             'name': 'disable windows security and maintenance notifications',
             'cmd': [
                 'powershell', '-command',
-                '"&{$p=\'HKCU:SOFTWARE\Microsoft\Windows\CurrentVersion\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance\';if(!(Test-Path -Path $p)){&New-Item -Path $p -Force}&Set-ItemProperty -Path $p -Name Enabled -Value 0}"'  # noqa
+                '"&{$p=\'HKCU:SOFTWARE\Microsoft\Windows\CurrentVersion\\Notifications\Settings\Windows.SystemToast.SecurityAndMaintenance\';if(!(Test-Path -Path $p)){&New-Item -Path $p -Force}&Set-ItemProperty -Path $p -Name Enabled -Value 0}"'  # noqa
             ],
             'architectures': ['32bit', '64bit'],
             'halt_on_failure': True,
             'enabled': (platform.release() == 10)
         },
         {
             'name': 'set windows VisualFX',
             'cmd': [
