diff --git a/tests/basic/test_sanity_check_repo.py b/tests/basic/test_sanity_check_repo.py
index 051c01e8d..97ca1cc95 100644
--- a/tests/basic/test_sanity_check_repo.py
+++ b/tests/basic/test_sanity_check_repo.py
@@ -7,6 +7,7 @@ import pytest
 from git import GitError, Repo
 
 from aider import urls
+import webbrowser
 from aider.main import sanity_check_repo
 
 
@@ -100,7 +101,8 @@ def test_detached_head_state(create_repo, mock_io):
     mock_io.tool_output.assert_not_called()
 
 
-def test_git_index_version_greater_than_2(create_repo, mock_io):
+@mock.patch('webbrowser.open')
+def test_git_index_version_greater_than_2(mock_browser, create_repo, mock_io):
     repo_path, repo = create_repo
     # Set the git index version to 3
     set_git_index_version(str(repo_path), 3)