diff --git a/diesel/src/test_helpers.rs b/diesel/src/test_helpers.rs
index 2bc0572b31c3..bccdd3bc93d1 100644
--- a/diesel/src/test_helpers.rs
+++ b/diesel/src/test_helpers.rs
@@ -1,3 +1,4 @@
+#![allow(missing_docs)] // test only module
 extern crate dotenvy;
 
 use crate::prelude::*;