Restore iframe switching

Author: guerler

test/integration_selenium/test_allowlist_sanitization.py

@@ -28,6 +28,7 @@ def test_html_output_sanitized(self):
         self.wait_for_selector_visible("[data-description='sanitization warning']")
         self.assert_selector_absent("[data-description='allowlist link']")
         self.screenshot("sanitization warning")
+        assert self.switch_to_frame()
         self.assert_selector_absent("[data-description='hello-world']")
         self.switch_to_default_content()
 
@@ -46,6 +47,7 @@ def test_html_output_sanitized_admin(self):
             self.driver.refresh()
             self.assert_selector_absent("[data-description='sanitization warning']")
             self.assert_selector_absent("[data-description='allowlist link']")
+            assert self.switch_to_frame()
             self.wait_for_selector("[data-description='hello-world']")
             self.switch_to_default_content()
         finally: