diff --git modules/comment/comment.test modules/comment/comment.test
index 0845806..9123268 100644
--- modules/comment/comment.test
+++ modules/comment/comment.test
@@ -409,7 +409,7 @@ class CommentInterfaceTest extends CommentHelperCase {
 
     // Checks the initial values of node comment statistics with no comment.
     $node = node_load($this->node->nid);
-    $this->assertEqual($node->last_comment_timestamp, $this->node->created, t('The initial value of node last_comment_timestamp is the node created date.'));
+    $this->assertEqual($node->last_comment_timestamp, $this->node->created, t('The initial value of node last_comment_timestamp is the node created date.' . $node->last_comment_timestamp . ", " . $this->node->created));
     $this->assertEqual($node->last_comment_name, NULL, t('The initial value of node last_comment_name is NULL.'));
     $this->assertEqual($node->last_comment_uid, $this->web_user->uid, t('The initial value of node last_comment_uid is the node uid.'));
     $this->assertEqual($node->comment_count, 0, t('The initial value of node comment_count is zero.'));
@@ -423,10 +423,12 @@ class CommentInterfaceTest extends CommentHelperCase {
     // Checks the new values of node comment statistics with comment #1.
     // The node needs to be reloaded with a node_load_multiple cache reset.
     $node = node_load($this->node->nid, NULL, TRUE);
-    $this->assertEqual($node->last_comment_timestamp, $comment_loaded->created, t('The value of node last_comment_timestamp is the comment #1 created date.'));
+    $this->assertEqual($node->last_comment_timestamp, $comment_loaded->created, t('The value of node last_comment_timestamp is the comment #1 created date.' . $node->last_comment_timestamp . ", " . $comment_loaded->created));
     $this->assertEqual($node->last_comment_name, NULL, t('The value of node last_comment_name is NULL.'));
     $this->assertEqual($node->last_comment_uid, $this->web_user2->uid, t('The value of node last_comment_uid is the comment #1 uid.'));
     $this->assertEqual($node->comment_count, 1, t('The value of node comment_count is 1.'));
+$this->verbose(var_export($node, TRUE));
+$this->verbose(var_export($comment_loaded, TRUE));
 
     // Prepare for anonymous comment submission (comment approval enabled).
     variable_set('user_register', USER_REGISTER_VISITORS);
@@ -449,10 +451,12 @@ class CommentInterfaceTest extends CommentHelperCase {
     // ensure they haven't changed since the comment has not been moderated.
     // The node needs to be reloaded with a node_load_multiple cache reset.
     $node = node_load($this->node->nid, NULL, TRUE);
-    $this->assertEqual($node->last_comment_timestamp, $comment_loaded->created, t('The value of node last_comment_timestamp is still the comment #1 created date.'));
+    $this->assertEqual($node->last_comment_timestamp, $comment_loaded->created, t('The value of node last_comment_timestamp is still the comment #1 created date.' . $node->last_comment_timestamp . ", " . $comment_loaded->created));
     $this->assertEqual($node->last_comment_name, NULL, t('The value of node last_comment_name is still NULL.'));
     $this->assertEqual($node->last_comment_uid, $this->web_user2->uid, t('The value of node last_comment_uid is still the comment #1 uid.'));
     $this->assertEqual($node->comment_count, 1, t('The value of node comment_count is still 1.'));
+$this->verbose(var_export($node, TRUE));
+$this->verbose(var_export($comment_loaded, TRUE));
 
     // Prepare for anonymous comment submission (no approval required).
     $this->drupalLogin($this->admin_user);
@@ -471,10 +475,12 @@ class CommentInterfaceTest extends CommentHelperCase {
     // Checks the new values of node comment statistics with comment #3.
     // The node needs to be reloaded with a node_load_multiple cache reset.
     $node = node_load($this->node->nid, NULL, TRUE);
-    $this->assertEqual($node->last_comment_timestamp, $comment_loaded->created, t('The value of node last_comment_timestamp is the comment #3 created date.'));
+    $this->assertEqual($node->last_comment_timestamp, $comment_loaded->created, t('The value of node last_comment_timestamp is the comment #3 created date.' . $node->last_comment_timestamp . ", " . $comment_loaded->created));
     $this->assertEqual($node->last_comment_name, $comment_loaded->name, t('The value of node last_comment_name is the name of the anonymous user.'));
     $this->assertEqual($node->last_comment_uid, 0, t('The value of node last_comment_uid is zero.'));
     $this->assertEqual($node->comment_count, 2, t('The value of node comment_count is 2.'));
+$this->verbose(var_export($node, TRUE));
+$this->verbose(var_export($comment_loaded, TRUE));
   }
 }