diff --git a/zebra-consensus/src/error.rs b/zebra-consensus/src/error.rs
index 19e8b113e..a89e8b71e 100644
--- a/zebra-consensus/src/error.rs
+++ b/zebra-consensus/src/error.rs
@@ -43,13 +43,13 @@ pub enum TransactionError {
     #[error("if there are no Spends or Outputs, the value balance MUST be 0.")]
     BadBalance,
 
-    /// Could not verify a transparent script
+    #[error("could not verify a transparent script")]
     Script(#[from] zebra_script::Error),
 
     // XXX change this when we align groth16 verifier errors with bellman
     // and add a from annotation when the error type is more precise
     #[error("spend proof MUST be valid given a primary input formed from the other fields except spendAuthSig")]
-    Groth16(BoxError),
+    Groth16,
 
     #[error(
         "joinSplitSig MUST represent a valid signature under joinSplitPubKey of dataToBeSigned"
@@ -64,7 +64,7 @@ impl From<BoxError> for TransactionError {
     fn from(err: BoxError) -> Self {
         match err.downcast::<redjubjub::Error>() {
             Ok(e) => TransactionError::RedJubjub(*e),
-            Err(e) => TransactionError::Internal(e),
+            Err(e) => panic!(e),
         }
     }
 }
diff --git a/zebra-consensus/src/transaction.rs b/zebra-consensus/src/transaction.rs
index 3d9d00edb..91fa6ed5b 100644
--- a/zebra-consensus/src/transaction.rs
+++ b/zebra-consensus/src/transaction.rs
@@ -5,7 +5,6 @@ use std::{
     task::{Context, Poll},
 };
 
-use displaydoc::Display;
 use futures::{
     stream::{FuturesUnordered, StreamExt},
     FutureExt,
diff --git a/zebra-script/src/lib.rs b/zebra-script/src/lib.rs
index 69ffad205..a5d4946cf 100644
--- a/zebra-script/src/lib.rs
+++ b/zebra-script/src/lib.rs
@@ -19,7 +19,7 @@ use zebra_chain::{
     transparent,
 };
 
-#[derive(Debug, Display, Error)]
+#[derive(Debug, Display, Error, PartialEq)]
 #[non_exhaustive]
 /// An Error type representing the error codes returned from zcash_script.
 pub enum Error {