diff --git a/taiga_halo2/Cargo.toml b/taiga_halo2/Cargo.toml
index 9aac844c..434f12a2 100644
--- a/taiga_halo2/Cargo.toml
+++ b/taiga_halo2/Cargo.toml
@@ -23,7 +23,7 @@ num-bigint = "0.4"
 
 rustler = { version = "0.29.1", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }
-borsh = { version = "1.0.0-alpha.3", features = ["derive"], optional = true }
+borsh = { version = "= 1.0.0-alpha.3", features = ["derive"], optional = true }
 
 [dev-dependencies]
 criterion = "0.5"
@@ -46,6 +46,6 @@ name = "tx_examples"
 
 [features]
 default = []
-nif = ["dep:rustler", "pasta_curves/repr-erlang"]
+nif = ["dep:rustler", "borsh", "pasta_curves/repr-erlang"]
 serde = ["dep:serde", "pasta_curves/serde"]
 borsh = ["dep:borsh"]
diff --git a/taiga_halo2/src/transaction.rs b/taiga_halo2/src/transaction.rs
index 2ea263e4..e24058fd 100644
--- a/taiga_halo2/src/transaction.rs
+++ b/taiga_halo2/src/transaction.rs
@@ -403,8 +403,7 @@ pub mod testing {
 
     #[test]
     fn test_halo2_transaction() {
-        use super::Transaction;
-        use borsh::{BorshDeserialize, BorshSerialize};
+        use super::*;
         use rand::rngs::OsRng;
 
         let rng = OsRng;
@@ -418,14 +417,14 @@ pub mod testing {
             transparent_ptx_bundle,
             r_vec,
         );
-        let (shielded_ret, _) = tx.execute().unwrap();
+        let (_shielded_ret, _) = tx.execute().unwrap();
 
         #[cfg(feature = "borsh")]
         {
             let borsh = tx.try_to_vec().unwrap();
             let de_tx: Transaction = BorshDeserialize::deserialize(&mut borsh.as_ref()).unwrap();
             let (de_shielded_ret, _) = de_tx.execute().unwrap();
-            assert_eq!(shielded_ret, de_shielded_ret);
+            assert_eq!(_shielded_ret, de_shielded_ret);
         }
     }
 }