diff --git a/benches/buf.rs b/benches/buf.rs
index 8f14aec20..77b0633ee 100644
--- a/benches/buf.rs
+++ b/benches/buf.rs
@@ -1,5 +1,5 @@
 #![feature(test)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 extern crate test;
 
diff --git a/benches/bytes.rs b/benches/bytes.rs
index 1741ba0a1..c5b84124f 100644
--- a/benches/bytes.rs
+++ b/benches/bytes.rs
@@ -1,5 +1,5 @@
 #![feature(test)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 extern crate test;
 
diff --git a/benches/bytes_mut.rs b/benches/bytes_mut.rs
index 8e0226c76..b06943621 100644
--- a/benches/bytes_mut.rs
+++ b/benches/bytes_mut.rs
@@ -1,5 +1,5 @@
 #![feature(test)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 extern crate test;
 
diff --git a/src/lib.rs b/src/lib.rs
index aad09d42d..a3f51b46d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,9 +1,4 @@
-#![deny(
-    warnings,
-    missing_docs,
-    missing_debug_implementations,
-    rust_2018_idioms
-)]
+#![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
 #![doc(test(
     no_crate_inject,
     attr(deny(warnings, rust_2018_idioms), allow(dead_code, unused_variables))
diff --git a/tests/test_buf.rs b/tests/test_buf.rs
index 26b95aee8..17bdd54e8 100644
--- a/tests/test_buf.rs
+++ b/tests/test_buf.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use bytes::Buf;
 #[cfg(feature = "std")]
diff --git a/tests/test_buf_mut.rs b/tests/test_buf_mut.rs
index c70e20928..b91e2e511 100644
--- a/tests/test_buf_mut.rs
+++ b/tests/test_buf_mut.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 #[cfg(feature = "std")]
 use bytes::buf::IoSliceMut;
diff --git a/tests/test_bytes.rs b/tests/test_bytes.rs
index 106fa6f4f..f7548dd05 100644
--- a/tests/test_bytes.rs
+++ b/tests/test_bytes.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use bytes::{Buf, BufMut, Bytes, BytesMut};
 
diff --git a/tests/test_chain.rs b/tests/test_chain.rs
index 82de7fcec..6dbc45d04 100644
--- a/tests/test_chain.rs
+++ b/tests/test_chain.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use bytes::buf::{BufExt, BufMutExt};
 use bytes::{Buf, BufMut, Bytes};
diff --git a/tests/test_debug.rs b/tests/test_debug.rs
index 7528bac87..08d2f254e 100644
--- a/tests/test_debug.rs
+++ b/tests/test_debug.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use bytes::Bytes;
 
diff --git a/tests/test_iter.rs b/tests/test_iter.rs
index 2302a69d6..a5bfddddf 100644
--- a/tests/test_iter.rs
+++ b/tests/test_iter.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use bytes::Bytes;
 
diff --git a/tests/test_reader.rs b/tests/test_reader.rs
index b5da2c963..10b480fcc 100644
--- a/tests/test_reader.rs
+++ b/tests/test_reader.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![cfg(feature = "std")]
 
 use std::io::{BufRead, Read};
diff --git a/tests/test_serde.rs b/tests/test_serde.rs
index 36b87f28e..cf4aeffa7 100644
--- a/tests/test_serde.rs
+++ b/tests/test_serde.rs
@@ -1,5 +1,5 @@
 #![cfg(feature = "serde")]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use serde_test::{assert_tokens, Token};
 
diff --git a/tests/test_take.rs b/tests/test_take.rs
index b9b525b1f..0afb28bb4 100644
--- a/tests/test_take.rs
+++ b/tests/test_take.rs
@@ -1,4 +1,4 @@
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use bytes::buf::{Buf, BufExt};