diff --git a/zebra-chain/src/lib.rs b/zebra-chain/src/lib.rs
index dca4e87f..e55b6351 100644
--- a/zebra-chain/src/lib.rs
+++ b/zebra-chain/src/lib.rs
@@ -16,7 +16,6 @@
 #![allow(unknown_lints)]
 // Disable old lint warnings on nightly until 1.51 is stable
 #![allow(renamed_and_removed_lints)]
-#![warn(missing_docs)]
 
 #[macro_use]
 extern crate serde;
diff --git a/zebra-chain/src/orchard.rs b/zebra-chain/src/orchard.rs
index 87df96a2..3fbeca40 100644
--- a/zebra-chain/src/orchard.rs
+++ b/zebra-chain/src/orchard.rs
@@ -1,13 +1,16 @@
 //! Orchard-related functionality.
 
+#![warn(missing_docs)]
+
 mod action;
 mod address;
 #[cfg(any(test, feature = "proptest-impl"))]
 mod arbitrary;
 mod commitment;
-pub mod keys;
 mod note;
 mod sinsemilla;
+
+pub mod keys;
 pub mod tree;
 
 pub use action::Action;
diff --git a/zebra-chain/src/sapling.rs b/zebra-chain/src/sapling.rs
index f93abb31..cabd65a5 100644
--- a/zebra-chain/src/sapling.rs
+++ b/zebra-chain/src/sapling.rs
@@ -5,6 +5,8 @@ mod address;
 mod arbitrary;
 mod commitment;
 mod note;
+mod output;
+mod spend;
 #[cfg(test)]
 mod tests;
 
diff --git a/zebra-chain/src/sapling/keys.rs b/zebra-chain/src/sapling/keys.rs
index 25457d91..7aa226d5 100644
--- a/zebra-chain/src/sapling/keys.rs
+++ b/zebra-chain/src/sapling/keys.rs
@@ -16,7 +16,7 @@ mod test_vectors;
 mod tests;
 
 use std::{
-    convert::{From, Into, TryFrom, TryInto},
+    convert::{From, Into, TryFrom},
     fmt,
     io::{self, Write},
     str::FromStr,