diff --git a/serde/src/lib.rs b/serde/src/lib.rs
index 4e50604a..26a57fe7 100644
--- a/serde/src/lib.rs
+++ b/serde/src/lib.rs
@@ -82,7 +82,7 @@
 // discussion of these features please refer to this issue:
 //
 //    https://github.com/serde-rs/serde/issues/812
-#![cfg_attr(feature = "unstable", feature(specialization))]
+#![cfg_attr(feature = "unstable", feature(specialization, never_type))]
 #![allow(unknown_lints, bare_trait_objects, deprecated)]
 #![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))]
 #![cfg_attr(feature = "cargo-clippy", deny(clippy, clippy_pedantic))]
diff --git a/test_suite/tests/test_de.rs b/test_suite/tests/test_de.rs
index 5fe6fd8a..025d87b0 100644
--- a/test_suite/tests/test_de.rs
+++ b/test_suite/tests/test_de.rs
@@ -1,4 +1,5 @@
 #![allow(clippy::decimal_literal_representation, clippy::unreadable_literal)]
+#![cfg_attr(feature = "unstable", feature(never_type))]
 
 use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::default::Default;
diff --git a/test_suite/tests/test_ser.rs b/test_suite/tests/test_ser.rs
index 05dafc9c..a62569af 100644
--- a/test_suite/tests/test_ser.rs
+++ b/test_suite/tests/test_ser.rs
@@ -1,4 +1,5 @@
 #![allow(clippy::unreadable_literal)]
+#![cfg_attr(feature = "unstable", feature(never_type))]
 
 use std::cell::RefCell;
 use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};