diff --git CHANGELOG.txt CHANGELOG.txt
index adfa2d2..7c9d1d5 100644
--- CHANGELOG.txt
+++ CHANGELOG.txt
@@ -1,5 +1,10 @@
 $Id$
 
+6.x-1.x-RC4 release
+===================
+- [#288577] by rfay, reprise: Add 13-digit ISBN/EAN support to the admin test
+
+
 6.x-1.x-RC3 release
 ===================
 - [#288577] by rfay, tirsales, mleicester: Added 13 digit ISBNs / EAN support / converting to ASINs.
@@ -53,4 +58,4 @@ $Id$
            Everything that is preprocessed in amazon_preprocess_amazon_item()
            is available for use. For example, [amazon 0596515804 detailpageurl]
 - #595980: Added a demonstration module (requires features module) that provides
-           a CCK type and a view. 
\ No newline at end of file
+           a CCK type and a view. 
diff --git amazon.admin.inc amazon.admin.inc
index c690c9f..86653c5 100644
--- amazon.admin.inc
+++ amazon.admin.inc
@@ -95,7 +95,7 @@ function amazon_test_form($form_state) {
   $form['asin'] = array(
     '#type' => 'textfield',
     '#title' => t('Amazon Product ID'),
-    '#description' => t('The ASIN of a product listed on Amazon.com. For books, this is generally the ISBN number.'),
+    '#description' => t('The ASIN, ISBN-10, or ISBN-13 of a product listed on Amazon.'),
     '#required' => TRUE,
   );
   $form['submit'] = array(
@@ -116,7 +116,10 @@ function amazon_test_form($form_state) {
 }
 
 function amazon_test_form_submit($form, &$form_state) {
-  $items = amazon_item_lookup($form_state['values']['asin'], TRUE);
+  $asin = $form_state['values']['asin'];
+  $asin = amazon_convert_to_asin($asin); // Normalize to an asin. ISBN-13 OK.
+
+  $items = amazon_item_lookup($asin, TRUE);
   if (!empty($items) && is_array($items)) {
     $item = array_pop($items);
     amazon_item_delete($item['asin']);