diff --git a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
index dd79fc2..85f2a5f 100644
--- a/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
+++ b/core/modules/outside_in/tests/src/FunctionalJavascript/OutsideInBlockFormTest.php
@@ -51,6 +51,7 @@ protected function setUp() {
    * Tests opening Offcanvas tray by click blocks and elements in the blocks.
    */
   public function testBlocks() {
+    $web_assert = $this->assertSession();
     $blocks = [
       [
         'id' => 'block-powered',
@@ -94,7 +95,6 @@ public function testBlocks() {
         $page->pressButton($block['button_text']);
         // Make sure the changes are present.
         $this->getSession()->wait(500);
-        $web_assert = $this->assertSession();
         $web_assert->pageTextContains($block['new_page_text']);
       }
 
@@ -113,8 +113,16 @@ public function testBlocks() {
       // suppressed.
       $this->openBlockForm($element_selector);
 
-      // Exit edit mode.
-      $this->toggleEditingMode();
+      // Exit edit mode using ESC.
+      $web_assert->elementTextContains('css', '.contextual-toolbar-tab button', 'Editing');
+      $web_assert->elementAttributeContains('css', '#main-canvas', 'class', 'js-outside-in-edit-mode');
+      // Simulate press the Escape key.
+      $this->getSession()->executeScript('jQuery("body").trigger(jQuery.Event("keyup", { keyCode: 27 }));');
+      $this->waitForOffCanvasToClose();
+      $this->getSession()->wait(100);
+      $web_assert->elementTextContains('css', '#drupal-live-announce', 'Exited edit mode.');
+      $web_assert->elementTextNotContains('css', '.contextual-toolbar-tab button', 'Editing');
+      $web_assert->elementAttributeNotContains('css', '#main-canvas', 'class', 'js-outside-in-edit-mode');
     }
   }