diff --git a/docs/topics/testing/tools.txt b/docs/topics/testing/tools.txt
index 5e2bfcfc84e..98e773fb31f 100644
--- a/docs/topics/testing/tools.txt
+++ b/docs/topics/testing/tools.txt
@@ -1666,7 +1666,8 @@ your test suite.
     of ``needle`` occurrences will be strictly verified.
 
     Whitespace in most cases is ignored, and attribute ordering is not
-    significant. The passed-in arguments must be valid HTML.
+    significant. The passed-in arguments must be valid HTML. See
+    :meth:`~SimpleTestCase.assertHTMLEqual` for more details.
 
 .. method:: SimpleTestCase.assertJSONEqual(raw, expected_data, msg=None)