The current implementation of the render_tests is overly complex due to its dependency on mocking filesystem operations with mock.mock_open. The test verifies the creation of a QR code output file but relies on mock patching pathlib.Path.open and performing assertions on the mocked behaviors. This approach adds unnecessary complexity and tightly couples the test to mock.

Refactor the test to use Python's tempfile module to handle file creation and comparison. This adjustment will simplify the test, reduce reliance on mocking, and offer a more direct and clean approach to verifying the QR code's output.