diff --git a/corpus/main.txt b/corpus/main.txt
index 1c19046..0fc0aa8 100644
--- a/corpus/main.txt
+++ b/corpus/main.txt
@@ -77,6 +77,27 @@ Void tags
         (attribute (attribute_name) (attribute_value))))
     (end_tag (tag_name))))
 
+==================================
+Custom tags
+==================================
+<something:different>
+  <atom-text-editor mini>
+    Hello
+  </atom-text-editor>
+</something:different>
+---
+
+(fragment
+  (element
+    (start_tag (tag_name))
+    (text)
+    (element
+      (start_tag (tag_name) (attribute (attribute_name)))
+      (text)
+      (end_tag (tag_name)))
+    (text)
+    (end_tag (tag_name))))
+
 ==================================
 Comments
 ==================================