Fix test_configfiles.test_init on Windows

tests/unit/config/test_configfiles.py

@@ -18,6 +18,7 @@
 
 """Tests for qutebrowser.config.configfiles."""
 
+import os
 
 import pytest
 
@@ -101,6 +102,7 @@ def test_init(init_patch, config_tmpdir):
     configfiles.init(config=None)
 
     # Make sure qsettings land in a subdir
+    if os.name != 'nt':
         settings = QSettings()
         settings.setValue("hello", "world")
         settings.sync()