diff --git a/tests/unit/utils/test_utils.py b/tests/unit/utils/test_utils.py
index a765cd977..ef677f120 100644
--- a/tests/unit/utils/test_utils.py
+++ b/tests/unit/utils/test_utils.py
@@ -989,9 +989,6 @@ def test_random_port():
 
 class TestOpenFile:
 
-    def __init__(self):
-        self.open_url_called = False
-
     def test_cmdline_without_argument(self, caplog, config_stub):
         config_stub.data = {'general': {'default-open-dispatcher': ''}}
         cmdline = '{} -c pass'.format(sys.executable)
@@ -1018,6 +1015,8 @@ class TestOpenFile:
 
     def test_system_default_application(self, caplog, config_stub,
                                         monkeypatch):
+        # pylint: disable=attribute-defined-outside-init
+        self.open_url_called = False
         config_stub.data = {'general': {'default-open-dispatcher': ''}}
         monkeypatch.setattr('PyQt5.QtGui.QDesktopServices.openUrl',
                             self.mock_open_url)
@@ -1028,4 +1027,5 @@ class TestOpenFile:
         assert self.open_url_called
 
     def mock_open_url(self, url):
+        # pylint: disable=attribute-defined-outside-init
         self.open_url_called = True