diff -u b/core/modules/comment/tests/src/Functional/CommentPreviewTest.php b/core/modules/comment/tests/src/Functional/CommentPreviewTest.php
--- b/core/modules/comment/tests/src/Functional/CommentPreviewTest.php
+++ b/core/modules/comment/tests/src/Functional/CommentPreviewTest.php
@@ -68,8 +68,8 @@
 
     // Check that the preview is displaying the title and body.
     $this->assertTitle('Preview comment | Drupal');
-    $this->assertText($edit['subject[0][value]']);
-    $this->assertText($edit['comment_body[0][value]']);
+    $this->assertText($edit['subject[0][value]'], 'Subject displayed.');
+    $this->assertText($edit['comment_body[0][value]'], 'Comment displayed.');
 
     // Check that the title and body fields are displayed with the correct values.
     $this->assertFieldByName('subject[0][value]', $edit['subject[0][value]'], 'Subject field displayed.');
@@ -102,8 +102,8 @@
 
     // Check that the preview is displaying the title and body.
     $this->assertTitle('Preview comment | Drupal');
-    $this->assertText($edit['subject[0][value]']);
-    $this->assertText($edit['comment_body[0][value]']);
+    $this->assertText($edit['subject[0][value]'], 'Subject displayed.');
+    $this->assertText($edit['comment_body[0][value]'], 'Comment displayed.');
 
     // Check that the title and body fields are displayed with the correct values.
     $this->assertFieldByName('subject[0][value]', $edit['subject[0][value]'], 'Subject field displayed.');
@@ -151,10 +151,10 @@
 
     // Check that the preview is displaying the subject, comment, author and date correctly.
     $this->assertTitle('Preview comment | Drupal');
-    $this->assertText($edit['subject[0][value]']);
-    $this->assertText($edit['comment_body[0][value]']);
-    $this->assertText($web_user->getAccountName());
-    $this->assertText($expected_text_date);
+    $this->assertText($edit['subject[0][value]'], 'Subject displayed.');
+    $this->assertText($edit['comment_body[0][value]'], 'Comment displayed.');
+    $this->assertText($web_user->getAccountName(), 'Author displayed.');
+    $this->assertText($expected_text_date, 'Date displayed.');
 
     // Check that the subject, comment, author and date fields are displayed with the correct values.
     $this->assertFieldByName('subject[0][value]', $edit['subject[0][value]'], 'Subject field displayed.');
diff -u b/core/modules/search/tests/src/Functional/SearchPageTextTest.php b/core/modules/search/tests/src/Functional/SearchPageTextTest.php
--- b/core/modules/search/tests/src/Functional/SearchPageTextTest.php
+++ b/core/modules/search/tests/src/Functional/SearchPageTextTest.php
@@ -77,7 +77,6 @@
     $this->assertText('search yielded no results');
     $this->assertText(t('Search'));
     $title_source = 'Search for @keywords | Drupal';
-    $title_source = 'Search for '.Unicode::truncate($search_terms, 60, TRUE, TRUE).' | Drupal';
     $this->assertTitle('Search for ' . Unicode::truncate($search_terms, 60, TRUE, TRUE) . ' | Drupal');
     $this->assertNoText('Node', 'Erroneous tab and breadcrumb text is not present');
     $this->assertNoText(t('Node'), 'Erroneous translated tab and breadcrumb text is not present');