diff --git a/src/doc/index.md b/src/doc/index.md
index e343173f50a..25eb063352a 100644
--- a/src/doc/index.md
+++ b/src/doc/index.md
@@ -43,6 +43,7 @@ li {list-style-type: none; }
 * [The `sync` library for concurrency-enabled mechanisms and primitives](sync/index.html)
 * [The `syntax` library, the Rust parser](syntax/index.html)
 * [The `term` terminal-handling library](term/index.html)
+* [The `test` library](test/index.html)
 * [The `uuid` 128-bit universally unique identifier library](uuid/index.html)
 
 # Tooling