diff --git a/tests/unit/browser/test_adblock.py b/tests/unit/browser/test_adblock.py
index 5c33b1141..8c09aa4d8 100644
--- a/tests/unit/browser/test_adblock.py
+++ b/tests/unit/browser/test_adblock.py
@@ -250,7 +250,8 @@ def test_without_datadir(config_stub, tmpdir, monkeypatch, win_registry):
 
 
 def test_disabled_blocking_update(basedir, config_stub, download_stub,
-                                  data_tmpdir, tmpdir, win_registry):
+                                  data_tmpdir, tmpdir, win_registry,
+                                  message_mock):
     """Ensure no URL is blocked when host blocking is disabled."""
     config_stub.data = {
         'content': {
@@ -285,7 +286,7 @@ def test_no_blocklist_update(config_stub, download_stub,
 
 
 def test_successful_update(config_stub, basedir, download_stub,
-                           data_tmpdir, tmpdir, win_registry):
+                           data_tmpdir, tmpdir, win_registry, message_mock):
     """Ensure hosts from host-block-lists are blocked after an update."""
     config_stub.data = {
         'content': {
@@ -305,7 +306,7 @@ def test_successful_update(config_stub, basedir, download_stub,
 
 
 def test_failed_dl_update(config_stub, basedir, download_stub,
-                          data_tmpdir, tmpdir, win_registry):
+                          data_tmpdir, tmpdir, win_registry, message_mock):
     """One blocklist fails to download.
 
     Ensure hosts from this list are not blocked.