diff --git a/src/doc/contrib/src/tests/writing.md b/src/doc/contrib/src/tests/writing.md
index 6072ee83818a..8994dd3f9451 100644
--- a/src/doc/contrib/src/tests/writing.md
+++ b/src/doc/contrib/src/tests/writing.md
@@ -30,6 +30,8 @@ stdout and stderr output against the expected output.
 
 Generally, a functional test will be placed in `tests/testsuite/<command>.rs` and will look roughly like:
 ```rust,ignore
+use cargo_test_support::prelude::*;
+
 #[cargo_test]
 fn <description>() {
     let p = project()