diff --git a/qutebrowser/test/utils/debug/test_qflags_key.py b/qutebrowser/test/utils/debug/test_qflags_key.py
new file mode 100644
index 000000000..6a2a85069
--- /dev/null
+++ b/qutebrowser/test/utils/debug/test_qflags_key.py
@@ -0,0 +1,77 @@
+# Copyright 2014-2015 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
+# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
+
+#
+# This file is part of qutebrowser.
+#
+# qutebrowser is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# qutebrowser is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Tests for qutebrowser.utils.debug.qflags_key.
+
+https://github.com/The-Compiler/qutebrowser/issues/42
+"""
+
+import pytest
+
+from PyQt5.QtCore import Qt
+from qutebrowser.utils import debug
+
+
+fixme = pytest.mark.xfail(reason="See issue #42", raises=AssertionError)
+
+
+@fixme
+def test_single():
+    """Test with single value."""
+    flags = debug.qflags_key(Qt, Qt.AlignTop)
+    assert flags == 'AlignTop'
+
+
+@fixme
+def test_multiple():
+    """Test with multiple values."""
+    flags = debug.qflags_key(Qt, Qt.AlignLeft | Qt.AlignTop)
+    assert flags == 'AlignLeft|AlignTop'
+
+
+def test_combined():
+    """Test with a combined value."""
+    flags = debug.qflags_key(Qt, Qt.AlignCenter)
+    assert flags == 'AlignHCenter|AlignVCenter'
+
+
+@fixme
+def test_add_base():
+    """Test with add_base=True."""
+    flags = debug.qflags_key(Qt, Qt.AlignTop, add_base=True)
+    assert flags == 'Qt.AlignTop'
+
+
+def test_int_noklass():
+    """Test passing an int without explicit klass given."""
+    with pytest.raises(TypeError):
+        debug.qflags_key(Qt, 42)
+
+
+@fixme
+def test_int():
+    """Test passing an int with explicit klass given."""
+    flags = debug.qflags_key(Qt, 0x0021, klass=Qt.Alignment)
+    assert flags == 'AlignLeft|AlignTop'
+
+
+def test_unknown():
+    """Test passing an unknown value."""
+    flags = debug.qflags_key(Qt, 0x1100, klass=Qt.Alignment)
+    assert flags == '0x0100|0x1000'
diff --git a/qutebrowser/test/utils/test_debug.py b/qutebrowser/test/utils/test_debug.py
index 203423cfe..d4dc5cdd6 100644
--- a/qutebrowser/test/utils/test_debug.py
+++ b/qutebrowser/test/utils/test_debug.py
@@ -24,58 +24,10 @@ import time
 import unittest
 import logging
 
-from PyQt5.QtCore import Qt
-
 from qutebrowser.utils import debug
 from qutebrowser.test import stubs
 
 
-class QFlagsKeyTests(unittest.TestCase):
-
-    """Tests for qflags_key()."""
-
-    # https://github.com/The-Compiler/qutebrowser/issues/42
-
-    @unittest.skip('FIXME')
-    def test_single(self):
-        """Test with single value."""
-        flags = debug.qflags_key(Qt, Qt.AlignTop)
-        self.assertEqual(flags, 'AlignTop')
-
-    @unittest.skip('FIXME')
-    def test_multiple(self):
-        """Test with multiple values."""
-        flags = debug.qflags_key(Qt, Qt.AlignLeft | Qt.AlignTop)
-        self.assertEqual(flags, 'AlignLeft|AlignTop')
-
-    def test_combined(self):
-        """Test with a combined value."""
-        flags = debug.qflags_key(Qt, Qt.AlignCenter)
-        self.assertEqual(flags, 'AlignHCenter|AlignVCenter')
-
-    @unittest.skip('FIXME')
-    def test_add_base(self):
-        """Test with add_base=True."""
-        flags = debug.qflags_key(Qt, Qt.AlignTop, add_base=True)
-        self.assertEqual(flags, 'Qt.AlignTop')
-
-    def test_int_noklass(self):
-        """Test passing an int without explicit klass given."""
-        with self.assertRaises(TypeError):
-            debug.qflags_key(Qt, 42)
-
-    @unittest.skip('FIXME')
-    def test_int(self):
-        """Test passing an int with explicit klass given."""
-        flags = debug.qflags_key(Qt, 0x0021, klass=Qt.Alignment)
-        self.assertEqual(flags, 'AlignLeft|AlignTop')
-
-    def test_unknown(self):
-        """Test passing an unknown value."""
-        flags = debug.qflags_key(Qt, 0x1100, klass=Qt.Alignment)
-        self.assertEqual(flags, '0x0100|0x1000')
-
-
 class TestDebug(unittest.TestCase):
 
     """Test signal debug output functions."""