diff --git a/docs/ctags.md b/docs/ctags.md
index f483035d1..2b511abd0 100644
--- a/docs/ctags.md
+++ b/docs/ctags.md
@@ -11,11 +11,17 @@ worth of code in its context window.
 
 To address this issue, `aider` has
 a new experimental feature that utilizes `ctags` to provide
-GPT with a **concise map of the whole repository** including
+GPT with a **concise map of your whole git repository** including
 all declared variables and functions with call signatures.
 This *repo map* enables GPT to better comprehend, navigate
 and edit the code in larger repos.
 
+To get a sense of how effective this can be, this
+[chat transcript](https://aider.chat/examples/add-test.html)
+shows GPT-4 creating a black box test case, **without being given
+access to the source code of the function being tested or any of the
+other code in the repo.**
+
 ## The problem: code context
 
 GPT-4 is great at "self contained" coding tasks, like writing or