diff --git a/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php b/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
index 226e706..cf60eac 100644
--- a/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
+++ b/core/modules/layout_discovery/tests/src/Kernel/LayoutTest.php
@@ -165,14 +165,14 @@ public function renderLayoutData() {
 EOD;
 
     $data['layout_test_1col_no_template'][] = <<<'EOD'
-<div data-drupal-selector="edit-layout" class="layout--layout-test-1col-no-template">
-  <div class="region--top">
-    This is the top
-  </div>
-  <div class="region--bottom">
-    This is the bottom
-  </div>
-</div>
+  <div data-drupal-selector="edit-layout" class="layout--layout-test-1col-no-template">
+      <div class="region--top">
+      This is the top
+    </div>
+      <div class="region--bottom">
+      This is the bottom
+    </div>
+    </div>
 EOD;
 
     $data['layout_test_2col'][] = <<<'EOD'