diff --git a/actix-web/src/introspection.rs b/actix-web/src/introspection.rs
index 6074f269..0059ed21 100644
--- a/actix-web/src/introspection.rs
+++ b/actix-web/src/introspection.rs
@@ -385,7 +385,7 @@ mod tests {
             let arbiter = {
                 // TODO: pass max blocking thread config when tokio-uring enable configuration
                 // on building runtime.
-                let _ = config.max_blocking_threads;
+                let _ = max_blocking_threads;
                 actix_rt::Arbiter::new()
             };