diff --git a/yarn-project/end-to-end/src/e2e_authwit.test.ts b/yarn-project/end-to-end/src/e2e_authwit.test.ts
index 42865d4793a..29e84a1b62d 100644
--- a/yarn-project/end-to-end/src/e2e_authwit.test.ts
+++ b/yarn-project/end-to-end/src/e2e_authwit.test.ts
@@ -3,6 +3,7 @@ import { SchnorrAccountContract } from '@aztec/noir-contracts.js';
 
 import { jest } from '@jest/globals';
 
+import { DUPLICATE_NULLIFIER_ERROR } from './fixtures/fixtures.js';
 import { publicDeployAccounts, setup } from './fixtures/utils.js';
 
 const TIMEOUT = 90_000;
@@ -86,7 +87,7 @@ describe('e2e_authwit_tests', () => {
           });
 
           // The transaction should be dropped because of a cancelled authwit (duplicate nullifier)
-          await expect(txCancelledAuthwit.wait()).rejects.toThrow('Transaction ');
+          await expect(txCancelledAuthwit.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
         });
 
         it('invalid chain id', async () => {
@@ -130,7 +131,7 @@ describe('e2e_authwit_tests', () => {
           });
 
           // The transaction should be dropped because of the invalid chain id
-          await expect(txCancelledAuthwit.wait()).rejects.toThrow('Transaction ');
+          await expect(txCancelledAuthwit.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
         });
 
         it('invalid version', async () => {
@@ -174,7 +175,7 @@ describe('e2e_authwit_tests', () => {
           });
 
           // The transaction should be dropped because of the invalid version
-          await expect(txCancelledAuthwit.wait()).rejects.toThrow('Transaction ');
+          await expect(txCancelledAuthwit.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
         });
       });
     });
@@ -234,7 +235,7 @@ describe('e2e_authwit_tests', () => {
           const c = await SchnorrAccountContract.at(wallets[0].getAddress(), wallets[0]);
           const txCancelledAuthwit = c.withWallet(wallets[1]).methods.spend_public_authwit(innerHash).send();
           // The transaction should be dropped because of a cancelled authwit (duplicate nullifier)
-          await expect(txCancelledAuthwit.wait()).rejects.toThrow('Transaction ');
+          await expect(txCancelledAuthwit.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
         });
       });
     });
diff --git a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/burn.test.ts b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/burn.test.ts
index cb521a0baef..05ca22f844f 100644
--- a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/burn.test.ts
+++ b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/burn.test.ts
@@ -1,6 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
-import { U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
+import { DUPLICATE_NULLIFIER_ERROR, U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
 import { BlacklistTokenContractTest } from './blacklist_token_contract_test.js';
 
 describe('e2e_blacklist_token_contract burn', () => {
@@ -50,7 +50,7 @@ describe('e2e_blacklist_token_contract burn', () => {
 
       // Check that the message hash is no longer valid. Need to try to send since nullifiers are handled by sequencer.
       const txReplay = asset.withWallet(wallets[1]).methods.burn_public(wallets[0].getAddress(), amount, nonce).send();
-      await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+      await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     });
 
     describe('failure cases', () => {
@@ -146,7 +146,7 @@ describe('e2e_blacklist_token_contract burn', () => {
 
       // Perform the transfer again, should fail
       const txReplay = asset.withWallet(wallets[1]).methods.burn(wallets[0].getAddress(), amount, nonce).send();
-      await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+      await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     });
 
     describe('failure cases', () => {
diff --git a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/shielding.test.ts b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/shielding.test.ts
index 4bffbc3a7ef..d5dfbe462e9 100644
--- a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/shielding.test.ts
+++ b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/shielding.test.ts
@@ -1,6 +1,6 @@
 import { Fr, computeSecretHash } from '@aztec/aztec.js';
 
-import { U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
+import { DUPLICATE_NULLIFIER_ERROR, U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
 import { BlacklistTokenContractTest } from './blacklist_token_contract_test.js';
 
 describe('e2e_blacklist_token_contract shield + redeem_shield', () => {
@@ -67,7 +67,7 @@ describe('e2e_blacklist_token_contract shield + redeem_shield', () => {
       .withWallet(wallets[1])
       .methods.shield(wallets[0].getAddress(), amount, secretHash, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
 
     // Redeem it
     await t.addPendingShieldNoteToPXE(0, amount, secretHash, receipt.txHash);
diff --git a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_private.test.ts b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_private.test.ts
index ed78def1481..ffc06411d2e 100644
--- a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_private.test.ts
+++ b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_private.test.ts
@@ -1,5 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
+import { DUPLICATE_NULLIFIER_ERROR } from '../fixtures/fixtures.js';
 import { BlacklistTokenContractTest } from './blacklist_token_contract_test.js';
 
 describe('e2e_blacklist_token_contract transfer private', () => {
@@ -67,7 +68,7 @@ describe('e2e_blacklist_token_contract transfer private', () => {
       .withWallet(wallets[1])
       .methods.transfer(wallets[0].getAddress(), wallets[1].getAddress(), amount, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
   });
 
   describe('failure cases', () => {
diff --git a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_public.test.ts b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_public.test.ts
index 1459704e8aa..45996cf0207 100644
--- a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_public.test.ts
+++ b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/transfer_public.test.ts
@@ -1,6 +1,6 @@
 import { Fr } from '@aztec/aztec.js';
 
-import { U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
+import { DUPLICATE_NULLIFIER_ERROR, U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
 import { BlacklistTokenContractTest } from './blacklist_token_contract_test.js';
 
 describe('e2e_blacklist_token_contract transfer public', () => {
@@ -66,7 +66,7 @@ describe('e2e_blacklist_token_contract transfer public', () => {
       .withWallet(wallets[1])
       .methods.transfer_public(wallets[0].getAddress(), wallets[1].getAddress(), amount, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
   });
 
   describe('failure cases', () => {
diff --git a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/unshielding.test.ts b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/unshielding.test.ts
index ba8f69e6f26..224a26b5f0f 100644
--- a/yarn-project/end-to-end/src/e2e_blacklist_token_contract/unshielding.test.ts
+++ b/yarn-project/end-to-end/src/e2e_blacklist_token_contract/unshielding.test.ts
@@ -1,5 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
+import { DUPLICATE_NULLIFIER_ERROR } from '../fixtures/fixtures.js';
 import { BlacklistTokenContractTest } from './blacklist_token_contract_test.js';
 
 describe('e2e_blacklist_token_contract unshielding', () => {
@@ -57,7 +58,7 @@ describe('e2e_blacklist_token_contract unshielding', () => {
       .withWallet(wallets[1])
       .methods.unshield(wallets[0].getAddress(), wallets[1].getAddress(), amount, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     // @todo @LHerskind This error is weird?
   });
 
diff --git a/yarn-project/end-to-end/src/e2e_token_contract/burn.test.ts b/yarn-project/end-to-end/src/e2e_token_contract/burn.test.ts
index ff7aed370b5..bfe3406329c 100644
--- a/yarn-project/end-to-end/src/e2e_token_contract/burn.test.ts
+++ b/yarn-project/end-to-end/src/e2e_token_contract/burn.test.ts
@@ -1,6 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
-import { U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
+import { DUPLICATE_NULLIFIER_ERROR, U128_UNDERFLOW_ERROR } from '../fixtures/index.js';
 import { TokenContractTest } from './token_contract_test.js';
 
 describe('e2e_token_contract burn', () => {
@@ -49,7 +49,7 @@ describe('e2e_token_contract burn', () => {
 
       // Check that the message hash is no longer valid. Need to try to send since nullifiers are handled by sequencer.
       const txReplay = asset.withWallet(wallets[1]).methods.burn_public(accounts[0].address, amount, nonce).send();
-      await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+      await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     });
 
     describe('failure cases', () => {
@@ -139,7 +139,7 @@ describe('e2e_token_contract burn', () => {
 
       // Perform the transfer again, should fail
       const txReplay = asset.withWallet(wallets[1]).methods.burn(accounts[0].address, amount, nonce).send();
-      await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+      await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     });
 
     describe('failure cases', () => {
diff --git a/yarn-project/end-to-end/src/e2e_token_contract/shielding.test.ts b/yarn-project/end-to-end/src/e2e_token_contract/shielding.test.ts
index b0cee961f35..93ab4e44870 100644
--- a/yarn-project/end-to-end/src/e2e_token_contract/shielding.test.ts
+++ b/yarn-project/end-to-end/src/e2e_token_contract/shielding.test.ts
@@ -1,6 +1,6 @@
 import { Fr, computeSecretHash } from '@aztec/aztec.js';
 
-import { U128_UNDERFLOW_ERROR } from '../fixtures/fixtures.js';
+import { DUPLICATE_NULLIFIER_ERROR, U128_UNDERFLOW_ERROR } from '../fixtures/fixtures.js';
 import { TokenContractTest } from './token_contract_test.js';
 
 describe('e2e_token_contract shield + redeem shield', () => {
@@ -60,7 +60,7 @@ describe('e2e_token_contract shield + redeem shield', () => {
 
     // Check that replaying the shield should fail!
     const txReplay = asset.withWallet(wallets[1]).methods.shield(accounts[0].address, amount, secretHash, nonce).send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
 
     // Redeem it
     await t.addPendingShieldNoteToPXE(0, amount, secretHash, receipt.txHash);
diff --git a/yarn-project/end-to-end/src/e2e_token_contract/transfer_private.test.ts b/yarn-project/end-to-end/src/e2e_token_contract/transfer_private.test.ts
index 3251c7422a9..fb5394567dc 100644
--- a/yarn-project/end-to-end/src/e2e_token_contract/transfer_private.test.ts
+++ b/yarn-project/end-to-end/src/e2e_token_contract/transfer_private.test.ts
@@ -1,5 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
+import { DUPLICATE_NULLIFIER_ERROR } from '../fixtures/fixtures.js';
 import { TokenContractTest } from './token_contract_test.js';
 
 describe('e2e_token_contract transfer private', () => {
@@ -66,7 +67,7 @@ describe('e2e_token_contract transfer private', () => {
       .withWallet(wallets[1])
       .methods.transfer(accounts[0].address, accounts[1].address, amount, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
   });
 
   describe('failure cases', () => {
@@ -188,7 +189,7 @@ describe('e2e_token_contract transfer private', () => {
         .withWallet(wallets[1])
         .methods.transfer(accounts[0].address, accounts[1].address, amount, nonce)
         .send();
-      await expect(txCancelledAuthwit.wait()).rejects.toThrowError('Transaction ');
+      await expect(txCancelledAuthwit.wait()).rejects.toThrowError(DUPLICATE_NULLIFIER_ERROR);
     });
 
     it('transfer on behalf of other, cancelled authwit, flow 2', async () => {
@@ -212,7 +213,7 @@ describe('e2e_token_contract transfer private', () => {
         .withWallet(wallets[1])
         .methods.transfer(accounts[0].address, accounts[1].address, amount, nonce)
         .send();
-      await expect(txCancelledAuthwit.wait()).rejects.toThrow('Transaction ');
+      await expect(txCancelledAuthwit.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     });
 
     it('transfer on behalf of other, invalid spend_private_authwit on "from"', async () => {
diff --git a/yarn-project/end-to-end/src/e2e_token_contract/transfer_public.test.ts b/yarn-project/end-to-end/src/e2e_token_contract/transfer_public.test.ts
index 13430c1916a..cb352c57df2 100644
--- a/yarn-project/end-to-end/src/e2e_token_contract/transfer_public.test.ts
+++ b/yarn-project/end-to-end/src/e2e_token_contract/transfer_public.test.ts
@@ -1,6 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
-import { U128_UNDERFLOW_ERROR } from '../fixtures/fixtures.js';
+import { DUPLICATE_NULLIFIER_ERROR, U128_UNDERFLOW_ERROR } from '../fixtures/fixtures.js';
 import { TokenContractTest } from './token_contract_test.js';
 
 describe('e2e_token_contract transfer public', () => {
@@ -65,7 +65,7 @@ describe('e2e_token_contract transfer public', () => {
       .withWallet(wallets[1])
       .methods.transfer_public(accounts[0].address, accounts[1].address, amount, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
   });
 
   describe('failure cases', () => {
@@ -194,7 +194,7 @@ describe('e2e_token_contract transfer public', () => {
         .withWallet(wallets[1])
         .methods.transfer_public(accounts[0].address, accounts[1].address, amount, nonce)
         .send();
-      await expect(txCancelledAuthwit.wait()).rejects.toThrowError('Transaction ');
+      await expect(txCancelledAuthwit.wait()).rejects.toThrowError(DUPLICATE_NULLIFIER_ERROR);
     });
 
     it('transfer on behalf of other, cancelled authwit, flow 2', async () => {
@@ -216,7 +216,7 @@ describe('e2e_token_contract transfer public', () => {
         .withWallet(wallets[1])
         .methods.transfer_public(accounts[0].address, accounts[1].address, amount, nonce)
         .send();
-      await expect(txCancelledAuthwit.wait()).rejects.toThrowError('Transaction ');
+      await expect(txCancelledAuthwit.wait()).rejects.toThrowError(DUPLICATE_NULLIFIER_ERROR);
     });
 
     it('transfer on behalf of other, cancelled authwit, flow 3', async () => {
@@ -244,7 +244,7 @@ describe('e2e_token_contract transfer public', () => {
         .withWallet(wallets[1])
         .methods.transfer_public(accounts[0].address, accounts[1].address, amount, nonce)
         .send();
-      await expect(txCancelledAuthwit.wait()).rejects.toThrow('Transaction ');
+      await expect(txCancelledAuthwit.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
     });
 
     it('transfer on behalf of other, invalid spend_public_authwit on "from"', async () => {
diff --git a/yarn-project/end-to-end/src/e2e_token_contract/unshielding.test.ts b/yarn-project/end-to-end/src/e2e_token_contract/unshielding.test.ts
index 998b978e081..d52b3ce214e 100644
--- a/yarn-project/end-to-end/src/e2e_token_contract/unshielding.test.ts
+++ b/yarn-project/end-to-end/src/e2e_token_contract/unshielding.test.ts
@@ -1,5 +1,6 @@
 import { Fr, computeAuthWitMessageHash } from '@aztec/aztec.js';
 
+import { DUPLICATE_NULLIFIER_ERROR } from '../fixtures/fixtures.js';
 import { TokenContractTest } from './token_contract_test.js';
 
 describe('e2e_token_contract unshielding', () => {
@@ -56,7 +57,7 @@ describe('e2e_token_contract unshielding', () => {
       .withWallet(wallets[1])
       .methods.unshield(accounts[0].address, accounts[1].address, amount, nonce)
       .send();
-    await expect(txReplay.wait()).rejects.toThrow('Transaction ');
+    await expect(txReplay.wait()).rejects.toThrow(DUPLICATE_NULLIFIER_ERROR);
   });
 
   describe('failure cases', () => {
diff --git a/yarn-project/end-to-end/src/fixtures/fixtures.ts b/yarn-project/end-to-end/src/fixtures/fixtures.ts
index c33f3929718..8e9284a1945 100644
--- a/yarn-project/end-to-end/src/fixtures/fixtures.ts
+++ b/yarn-project/end-to-end/src/fixtures/fixtures.ts
@@ -7,3 +7,5 @@ export const U128_UNDERFLOW_ERROR = "Assertion failed: attempt to subtract with
 export const U128_OVERFLOW_ERROR = "Assertion failed: attempt to add with overflow 'hi == high'";
 export const BITSIZE_TOO_BIG_ERROR =
   "Assertion failed: call to assert_max_bit_size 'self.__assert_max_bit_size(bit_size)'";
+// TODO(https://github.com/AztecProtocol/aztec-packages/issues/5818): Make this a fixed error after transition.
+export const DUPLICATE_NULLIFIER_ERROR = /Transaction .*|.*duplicate nullifier.*/;