diff --git a/src/doc/trpl/testing.md b/src/doc/trpl/testing.md
index 2f35290b4b1..c6aeb86f7d3 100644
--- a/src/doc/trpl/testing.md
+++ b/src/doc/trpl/testing.md
@@ -505,4 +505,5 @@ you add more examples.
 We haven’t covered all of the details with writing documentation tests. For more,
 please see the [Documentation chapter](documentation.html)
 
-One final note: Tests *cannot* be run on the binary (main) file. To see more on file arrangement see the [Crates and Modules](https://doc.rust-lang.org/stable/book/crates-and-modules.html) Section
+One final note: Tests *cannot* be run on a binary file. To see more on file arrangement see the [Crates and Modules](crates-and-modules.html) section.
+