diff --git a/crates/sc-proof-of-time/src/verifier/tests.rs b/crates/sc-proof-of-time/src/verifier/tests.rs
index 54de3f61c4..47b33fbadd 100644
--- a/crates/sc-proof-of-time/src/verifier/tests.rs
+++ b/crates/sc-proof-of-time/src/verifier/tests.rs
@@ -1,7 +1,6 @@
 use crate::verifier::PotVerifier;
 use sp_consensus_slots::Slot;
 use sp_consensus_subspace::{PotNextSlotInput, PotParametersChange};
-use std::mem;
 use std::num::NonZeroU32;
 use subspace_core_primitives::{Blake3Hash, PotSeed};
 
diff --git a/crates/subspace-core-primitives/src/checksum.rs b/crates/subspace-core-primitives/src/checksum.rs
index bf2fdc7932..c54bdf130b 100644
--- a/crates/subspace-core-primitives/src/checksum.rs
+++ b/crates/subspace-core-primitives/src/checksum.rs
@@ -4,7 +4,6 @@
 mod tests;
 
 use crate::Blake3Hash;
-use core::mem;
 use parity_scale_codec::{Decode, Encode, EncodeLike, Error, Input, Output};
 
 /// Output wrapper for SCALE codec that will write Blake3 checksum at the end of the encoding
diff --git a/crates/subspace-core-primitives/src/checksum/tests.rs b/crates/subspace-core-primitives/src/checksum/tests.rs
index b11f5db5c0..09bb29e90f 100644
--- a/crates/subspace-core-primitives/src/checksum/tests.rs
+++ b/crates/subspace-core-primitives/src/checksum/tests.rs
@@ -2,7 +2,6 @@ use super::Blake3Checksummed;
 use crate::Blake3Hash;
 use parity_scale_codec::{Decode, Encode};
 use rand::prelude::*;
-use std::mem;
 
 #[test]
 fn basic() {
diff --git a/crates/subspace-farmer-components/src/plotting.rs b/crates/subspace-farmer-components/src/plotting.rs
index c5fc3ca293..2e1a5e9c1f 100644
--- a/crates/subspace-farmer-components/src/plotting.rs
+++ b/crates/subspace-farmer-components/src/plotting.rs
@@ -20,7 +20,6 @@ use futures::StreamExt;
 use parity_scale_codec::{Decode, Encode};
 use parking_lot::Mutex;
 use rayon::prelude::*;
-use std::mem;
 use std::simd::Simd;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
diff --git a/crates/subspace-farmer/src/disk_piece_cache.rs b/crates/subspace-farmer/src/disk_piece_cache.rs
index 76b274f8b4..84c42fe994 100644
--- a/crates/subspace-farmer/src/disk_piece_cache.rs
+++ b/crates/subspace-farmer/src/disk_piece_cache.rs
@@ -22,7 +22,7 @@ use std::fs::{File, OpenOptions};
 use std::path::Path;
 use std::sync::Arc;
 use std::task::Poll;
-use std::{fs, io, mem};
+use std::{fs, io};
 use subspace_core_primitives::crypto::blake3_hash_list;
 use subspace_core_primitives::{Blake3Hash, Piece, PieceIndex};
 use subspace_farmer_components::file_ext::FileExt;