def METHOD_NAME(self):
    # Arrange
    activity_page = self.create_activity_detail_page(
        "Test 2", "test-2", grade_level_list=[1, 2]
    )
    save_new_page(activity_page, self.index_page)
    # Act
    actual_url = activity_page.get_related_activities_url()
    # Assert
    self.assertEqual(
        actual_url, "/test-index/?q=&topic=7&grade_level=1&grade_level=2"
    )