diff --git a/benches/buf.rs b/benches/buf.rs
index 8f14aec..77b0633 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 1741ba0..c5b8412 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 8e0226c..b069436 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 accbf71..0147204 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 26b95ae..17bdd54 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 c70e209..b91e2e5 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 bbe51f5..6b106a6 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 82de7fc..6dbc45d 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 7528bac..08d2f25 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 2302a69..a5bfddd 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 b5da2c9..10b480f 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 36b87f2..cf4aeff 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 b9b525b..0afb28b 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};