diff --git a/rollup/src/address.rs b/rollup/src/address.rs
index da98ed1..26f1c8c 100644
--- a/rollup/src/address.rs
+++ b/rollup/src/address.rs
@@ -4,7 +4,7 @@ use serde::{Deserialize, Serialize};
 
 /// A newtype wrapper around an Ethereum address.
 /// Allows conversion from a public key.
-#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq)]
+#[derive(Serialize, Deserialize, Debug, Clone, Copy, PartialEq, Eq)]
 pub struct Address(AlloyAddress);
 
 impl From<PublicKey> for Address {
diff --git a/rollup/src/block.rs b/rollup/src/block.rs
index 35d50fc..e335d39 100644
--- a/rollup/src/block.rs
+++ b/rollup/src/block.rs
@@ -5,7 +5,7 @@ use serde::{Deserialize, Serialize};
 use crate::{Address, Signature, SignedTransaction, Signer};
 
 /// A block header containing metadata about the block.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct BlockHeader {
     /// The address of the sequencer that sealed the block.
     pub sequencer: Address,
@@ -30,7 +30,7 @@ impl BlockHeader {
 }
 
 /// A signed block header containing a block header and a signature.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct SignedBlockHeader {
     header: BlockHeader,
     signature: Signature,
@@ -45,10 +45,10 @@ impl SignedBlockHeader {
 }
 
 /// A block containing a header and a list of transactions.
-#[derive(Serialize, Deserialize, Clone)]
+#[derive(Serialize, Deserialize, Clone, Eq, PartialEq)]
 pub struct Block {
     pub(crate) signed: SignedBlockHeader,
-    transactions: Vec<SignedTransaction>,
+    pub(crate) transactions: Vec<SignedTransaction>,
 }
 
 impl std::fmt::Debug for Block {
diff --git a/rollup/src/blockchain.rs b/rollup/src/blockchain.rs
index 1c25c06..7af2695 100644
--- a/rollup/src/blockchain.rs
+++ b/rollup/src/blockchain.rs
@@ -22,8 +22,8 @@ impl Default for Blockchain {
 
 impl Blockchain {
     /// Returns the head block of the blockchain.
-    pub(crate) fn head(&self) -> Option<&Block> {
-        self.blocks.last()
+    pub(crate) fn head(&self) -> Option<Block> {
+        self.blocks.last().cloned()
     }
 
     /// Returns the height of the blockchain.
diff --git a/rollup/src/sequencer.rs b/rollup/src/sequencer.rs
index d80703f..81a95c0 100644
--- a/rollup/src/sequencer.rs
+++ b/rollup/src/sequencer.rs
@@ -83,7 +83,7 @@ impl Sequencer {
     }
 
     /// Returns the head block of the blockchain.
-    pub fn head(&self) -> Option<&Block> {
+    pub fn head(&self) -> Option<Block> {
         self.blockchain.head()
     }
 }
@@ -120,3 +120,32 @@ impl Future for ArcSequencer {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_sequencer() {
+        // Create a sequencer.
+        let signer = Signer::random();
+        let sequencer = ArcSequencer::new(signer);
+        let mut sequencer = sequencer.lock().await;
+
+        // Add a transaction to the sequencer.
+        let transaction = SignedTransaction::new(
+            Transaction::dynamic(sequencer.signer.address, 100),
+            &sequencer.signer,
+        );
+        sequencer.add_transaction(transaction.clone());
+
+        // Seal the block.
+        let block = sequencer.seal();
+
+        // Validate the block.
+        assert_eq!(block.transactions.len(), 1);
+        assert_eq!(block.transactions[0], transaction);
+        assert_eq!(sequencer.head().unwrap(), block);
+        assert!(block.verify());
+    }
+}
diff --git a/rollup/src/signer.rs b/rollup/src/signer.rs
index 3c2997b..77aa2b8 100644
--- a/rollup/src/signer.rs
+++ b/rollup/src/signer.rs
@@ -10,7 +10,7 @@ use std::str::FromStr;
 use crate::Address;
 
 /// A recoverable seckp256k1 signature.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct Signature {
     /// The r component of the signature.
     pub r: U256,
diff --git a/rollup/src/transaction.rs b/rollup/src/transaction.rs
index 2a6b8c8..6067f7c 100644
--- a/rollup/src/transaction.rs
+++ b/rollup/src/transaction.rs
@@ -6,7 +6,7 @@ use crate::signer::{Signature, Signer};
 use crate::{Address, CHAIN_ID};
 
 /// A transaction header containing metadata about the transaction.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct TransactionHeader {
     /// The identifier of the chain on which the transaction was intended to be executed.
     chain_id: u64,
@@ -19,7 +19,7 @@ pub struct TransactionHeader {
 }
 
 /// A dynamic transaction containing a transaction header and dynamic fee data.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct DynamicTxData {
     /// The transaction header.
     header: TransactionHeader,
@@ -38,7 +38,7 @@ impl DynamicTxData {
 }
 
 /// A withdrawal transaction containing a transaction header and destination.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct WithdrawalTxData {
     /// The transaction header.
     header: TransactionHeader,
@@ -55,7 +55,7 @@ impl WithdrawalTxData {
 }
 
 /// A transaction containing either dynamic or withdrawal transaction data.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub enum Transaction {
     Dynamic(DynamicTxData),
     Withdrawal(WithdrawalTxData),
@@ -109,7 +109,7 @@ impl Transaction {
 }
 
 /// A signed transaction containing a transaction and signature.
-#[derive(Serialize, Deserialize, Debug, Clone)]
+#[derive(Serialize, Deserialize, Debug, Clone, Eq, PartialEq)]
 pub struct SignedTransaction {
     pub transaction: Transaction,
     pub signature: Signature,