diff --git a/zebra-chain/src/addresses/sprout.rs b/zebra-chain/src/addresses/sprout.rs
index f76aa62d..8a76186a 100644
--- a/zebra-chain/src/addresses/sprout.rs
+++ b/zebra-chain/src/addresses/sprout.rs
@@ -3,16 +3,13 @@
 use std::{fmt, io};
 
 use bs58;
-use sha2::Sha256;
 
 #[cfg(test)]
 use proptest::{arbitrary::Arbitrary, collection::vec, prelude::*};
 
 use crate::{
     keys::sprout,
-    serialization::{
-        ReadZcashExt, SerializationError, WriteZcashExt, ZcashDeserialize, ZcashSerialize,
-    },
+    serialization::{ReadZcashExt, SerializationError, ZcashDeserialize, ZcashSerialize},
     Network,
 };
 
diff --git a/zebra-chain/src/keys/sprout.rs b/zebra-chain/src/keys/sprout.rs
index 943a3297..2fbb25c2 100644
--- a/zebra-chain/src/keys/sprout.rs
+++ b/zebra-chain/src/keys/sprout.rs
@@ -6,11 +6,6 @@
 //!
 //! [ps]: https://zips.z.cash/protocol/protocol.pdf#sproutkeycomponents
 
-use std::{
-    fmt,
-    io::{self},
-};
-
 use byteorder::{ByteOrder, LittleEndian};
 
 #[cfg(test)]
@@ -20,8 +15,6 @@ use proptest_derive::Arbitrary;
 
 use sha2::sha256_utils::compress256;
 
-use crate::serialization::{SerializationError, ZcashDeserialize, ZcashSerialize};
-
 /// Our root secret key of the Sprout key derivation tree.
 ///
 /// All other Sprout key types derive from the SpendingKey value.
@@ -44,7 +37,7 @@ impl From<SpendingKey> for ReceivingKey {
         let mut block = [0u8; 64]; // Thus, t = 0
 
         block[0..32].copy_from_slice(&spending_key.0[..]);
-        block[0] |= 0b11000000;
+        block[0] |= 0b1100_0000;
 
         compress256(&mut state, &block);
 
@@ -69,7 +62,7 @@ impl From<SpendingKey> for PayingKey {
         let mut block = [0u8; 64];
 
         block[0..32].copy_from_slice(&spending_key.0[..]);
-        block[0] |= 0b11000000;
+        block[0] |= 0b1100_0000;
 
         block[32] = 1u8; // t = 1