diff --git a/Cargo.toml b/Cargo.toml
index e4dbe38a34b6..bb093fbb3cf3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -187,6 +187,7 @@ manual_strip = 'warn'
 unnecessary_mut_passed = 'warn'
 unnecessary_fallible_conversions = 'warn'
 unnecessary_cast = 'warn'
+question_mark = 'warn'
 
 [workspace.dependencies]
 arbitrary = { version = "1.3.1" }