diff --git a/qutebrowser/app.py b/qutebrowser/app.py
index 3e133eecb..f55f7f071 100644
--- a/qutebrowser/app.py
+++ b/qutebrowser/app.py
@@ -24,7 +24,6 @@ import sys
 import subprocess
 import configparser
 import signal
-import warnings
 import bdb
 import base64
 import functools
@@ -86,11 +85,6 @@ class Application(QApplication):
         self._crashdlg = None
         self._crashlogfile = None
 
-        if args.debug:
-            # We don't enable this earlier because some imports trigger
-            # warnings (which are not our fault).
-            warnings.simplefilter('default')
-
         qt_args = qtutils.get_args(args)
         log.init.debug("Qt arguments: {}, based on {}".format(qt_args, args))
         super().__init__(qt_args)
diff --git a/qutebrowser/utils/log.py b/qutebrowser/utils/log.py
index 1cb46840e..5cb346aba 100644
--- a/qutebrowser/utils/log.py
+++ b/qutebrowser/utils/log.py
@@ -27,6 +27,7 @@ import contextlib
 import collections
 import faulthandler
 import traceback
+import warnings
 
 from PyQt5.QtCore import (QtDebugMsg, QtWarningMsg, QtCriticalMsg, QtFatalMsg,
                           qInstallMessageHandler)
@@ -149,6 +150,7 @@ def init_log(args):
         root.addHandler(ram)
     root.setLevel(logging.NOTSET)
     logging.captureWarnings(True)
+    warnings.simplefilter('default')
     qInstallMessageHandler(qt_message_handler)