diff --git a/tokio-macros/src/entry.rs b/tokio-macros/src/entry.rs
index 8f80499b8..ae8c0b9d9 100644
--- a/tokio-macros/src/entry.rs
+++ b/tokio-macros/src/entry.rs
@@ -254,7 +254,7 @@ fn parse_knobs(
                 .enable_all()
                 .build()
                 .unwrap()
-                .block_on(async { #body })
+                .block_on(async #body)
         }
     };
 
diff --git a/tokio/tests/macros_test.rs b/tokio/tests/macros_test.rs
index 8e68b8a44..839639814 100644
--- a/tokio/tests/macros_test.rs
+++ b/tokio/tests/macros_test.rs
@@ -17,3 +17,11 @@ async fn test_macro_is_resilient_to_shadowing() {
     .await
     .unwrap();
 }
+
+// https://github.com/tokio-rs/tokio/issues/3403
+#[rustfmt::skip] // this `rustfmt::skip` is necessary because unused_braces does not warn if the block contains newline.
+#[tokio::main]
+async fn unused_braces_main() { println!("hello") }
+#[rustfmt::skip] // this `rustfmt::skip` is necessary because unused_braces does not warn if the block contains newline.
+#[tokio::test]
+async fn unused_braces_test() { assert_eq!(1 + 1, 2) }