old_contents: import pytest
  
  from app import app
  
  
  @pytest.fixture
  def app():
      return app
  
  
  @pytest.fixture
  def client():
      return app.test_client()
  
new_contents: import pytest
  
  from app import app as testable_app
  
  
  @pytest.fixture
  def app():
      return testable_app
  
  
  @pytest.fixture
  def client(app):
      return app.test_client()
  
subject: Fix tests.