diff --git modules/comment/comment.test modules/comment/comment.test
index 108c3a4..317771d 100644
--- modules/comment/comment.test
+++ modules/comment/comment.test
@@ -535,7 +535,9 @@ class CommentPreviewTest extends CommentHelperCase {
     $edit['comment_body[' . $langcode . '][0][value]'] = $this->randomName(16);
     $edit['name'] = $web_user->name;
     $edit['date'] = '2008-03-02 17:23 +0300';
-    $expected_date = format_date(strtotime($edit['date']));
+    $raw_date = strtotime($edit['date']);
+    $expected_text_date = format_date($raw_date);
+    $expected_form_date = format_date($raw_date, 'custom', 'Y-m-d H:i O');
     $comment = $this->postComment($this->node, $edit['subject'], $edit['comment_body[' . $langcode . '][0][value]'], TRUE);
     $this->drupalPost('comment/' . $comment->id . '/edit', $edit, t('Preview'));
 
@@ -544,13 +546,34 @@ class CommentPreviewTest extends CommentHelperCase {
     $this->assertText($edit['subject'], t('Subject displayed.'));
     $this->assertText($edit['comment_body[' . $langcode . '][0][value]'], t('Comment displayed.'));
     $this->assertText($edit['name'], t('Author displayed.'));
-    $this->assertText($expected_date, t('Date displayed.'));
+    $this->assertText($expected_text_date, t('Date displayed.'));
 
     // Check that the title and body fields are displayed with the correct values.
     $this->assertFieldByName('subject', $edit['subject'], t('Subject field displayed.'));
     $this->assertFieldByName('comment_body[' . $langcode . '][0][value]', $edit['comment_body[' . $langcode . '][0][value]'], t('Comment field displayed.'));
     $this->assertFieldByName('name', $edit['name'], t('Author field displayed.'));
     $this->assertFieldByName('date', $edit['date'], t('Date field displayed.'));
+
+    // Check that saving a comment produces a success message.
+    $this->drupalPost('comment/' . $comment->id . '/edit', $edit, t('Save'));
+    $this->assertText(t('Your comment has been posted.'), t('Comment posted.'));
+
+    // Check that the comment fields are correct after loading the saved comment.
+    $this->drupalGet('comment/' . $comment->id . '/edit');
+    $this->assertFieldByName('subject', $edit['subject'], t('Subject field displayed.'));
+    $this->assertFieldByName('comment_body[' . $langcode . '][0][value]', $edit['comment_body[' . $langcode . '][0][value]'], t('Comment field displayed.'));
+    $this->assertFieldByName('name', $edit['name'], t('Author field displayed.'));
+    $this->assertFieldByName('date', $expected_form_date, t('Date field displayed.'));
+
+    // Check that the comment data is correct after submitting the comment edit form with a small change.
+    $edit['subject'] = $edit['subject'] . ' edited';
+    $this->drupalPost('comment/' . $comment->id . '/edit', $edit, t('Save'));
+    $comment_loaded = comment_load($comment->id);
+    $this->assertEqual($comment_loaded->subject, $edit['subject'] . ' edited', t('Subject loaded.'));
+    $this->assertEqual($comment_loaded->comment_body[$langcode][0]['value'], $edit['comment_body[' . $langcode . '][0][value]'], t('Comment body loaded.'));
+    $this->assertEqual($comment_loaded->name, $edit['name'], t('Name loaded.'));
+    $this->assertEqual($comment_loaded->created, $raw_date, t('Date loaded.'));
+
   }
 
 }