Try another workaround for broken Windows tests.

qutebrowser/test/__init__.py

@@ -19,13 +19,15 @@
 
 """The qutebrowser test suite."""
 
-import atexit
+from PyQt5.QtCore import qInstallMessageHandler
-import functools
-
-import sip
 from PyQt5.QtWidgets import QApplication
 
-# We create a singleton QApplication here.
 
-qApp = QApplication([])
+def qt_message_handler(msg_type, context, msg):
-atexit.register(functools.partial(sip.delete, qApp))
+    print("Qt message: {}".format(msg))
+
+
+# We create a singleton QApplication here.
+app = QApplication([])
+qInstallMessageHandler(qt_message_handler)
+