diff --git a/qutebrowser/utils/log.py b/qutebrowser/utils/log.py
index 1f1071673..269e1e38d 100644
--- a/qutebrowser/utils/log.py
+++ b/qutebrowser/utils/log.py
@@ -285,6 +285,8 @@ def qt_message_handler(msg_type, context, msg):
         'QXcbWindow: Unhandled client message: "_E_',
         'QXcbWindow: Unhandled client message: "_ECORE_',
         'QXcbWindow: Unhandled client message: "_GTK_',
+        # Happens on AppVeyor CI
+        'SetProcessDpiAwareness failed:',
     )
     if any(msg.strip().startswith(pattern) for pattern in suppressed_msgs):
         level = logging.DEBUG
diff --git a/tox.ini b/tox.ini
index b51497562..603a771a6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -162,4 +162,6 @@ pep8ignore =
     resources.py ALL
 mccabe-complexity = 12
 qt_log_level_fail = WARNING
-qt_log_ignore = ^SpellCheck: .*
+qt_log_ignore =
+    ^SpellCheck: .*
+    ^SetProcessDpiAwareness failed: .*