diff --git a/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderTest.php b/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderTest.php
index 490e5bf..f3e3762 100644
--- a/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderTest.php
+++ b/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderTest.php
@@ -394,7 +394,7 @@ public function testFormBlock() {
     $this->drupalGet("$field_ui_prefix/display/default/layout");
 
     $this->openAddBlockForm('User login');
-    $page->pressButton('Add Block');
+    $page->pressButton('Add block');
     $assert_session->assertWaitOnAjaxRequest();
 
     $assert_session->pageTextContains('User login');
@@ -407,7 +407,7 @@ public function testFormBlock() {
     $assert_session->pageTextContains('User login');
 
     $this->openAddBlockForm('Powered by Drupal');
-    $page->pressButton('Add Block');
+    $page->pressButton('Add block');
     $assert_session->assertWaitOnAjaxRequest();
 
     $page->pressButton('Save layout');