diff --git a/core/modules/config/src/Tests/ConfigImportUITest.php b/core/modules/config/src/Tests/ConfigImportUITest.php
index ea52485..8c2e5bf 100644
--- a/core/modules/config/src/Tests/ConfigImportUITest.php
+++ b/core/modules/config/src/Tests/ConfigImportUITest.php
@@ -302,14 +302,14 @@ function testImportDiff() {
     // changed.
 
     // Changed values are escaped.
-    $this->assertText(Html::escape('<p><em>foobar</em></p>'));
-    $this->assertText(Html::escape('<p>foobar</p>'));
+    $this->assertText(Html::escape("foo: '<p><em>foobar</em></p>'"));
+    $this->assertText(Html::escape("foo: '<p>foobar</p>'"));
     // The no change values are escaped.
-    $this->assertText(Html::escape('<strong>no change</strong>'));
+    $this->assertText(Html::escape("baz: '<strong>no change</strong>'"));
     // Added value is escaped.
-    $this->assertText(Html::escape('<em>bangpow</em>'));
+    $this->assertText(Html::escape("biff: '<em>bangpow</em>'"));
     // Deleted value is escaped.
-    $this->assertText(Html::escape('<em>herp</em>'));
+    $this->assertText(Html::escape("404: '<em>herp</em>'"));
 
     // Reset data back to original, and remove a key
     $staging_data = $original_data;
@@ -319,10 +319,10 @@ function testImportDiff() {
     // Load the diff UI and verify that the diff reflects a removed key.
     $this->drupalGet('admin/config/development/configuration/sync/diff/' . $config_name);
     // The no change values are escaped.
-    $this->assertText(Html::escape('<p>foobar</p>'));
-    $this->assertText(Html::escape('<strong>no change</strong>'));
+    $this->assertText(Html::escape("foo: '<p>foobar</p>'"));
+    $this->assertText(Html::escape("baz: '<strong>no change</strong>'"));
     // Removed key is escaped.
-    $this->assertText(Html::escape('<em>herp</em>'));
+    $this->assertText(Html::escape("404: '<em>herp</em>'"));
 
     // Reset data back to original and add a key
     $staging_data = $original_data;
@@ -332,10 +332,10 @@ function testImportDiff() {
     // Load the diff UI and verify that the diff reflects an added key.
     $this->drupalGet('admin/config/development/configuration/sync/diff/' . $config_name);
     // The no change values are escaped.
-    $this->assertText(Html::escape('<p>foobar</p>'));
-    $this->assertText(Html::escape('<strong>no change</strong>'));
+    $this->assertText(Html::escape("baz: '<strong>no change</strong>'"));
+    $this->assertText(Html::escape("404: '<em>herp</em>'"));
     // Added key is escaped.
-    $this->assertText(Html::escape('<em>bangpow</em>'));
+    $this->assertText(Html::escape("biff: '<em>bangpow</em>'"));
   }
 
   /**