diff --git a/l1-contracts/src/core/Rollup.sol b/l1-contracts/src/core/Rollup.sol
index 4d6b7f197e0..bd6cbe0246a 100644
--- a/l1-contracts/src/core/Rollup.sol
+++ b/l1-contracts/src/core/Rollup.sol
@@ -229,6 +229,9 @@ contract Rollup is Leonidas, IRollup, ITestRollup {
     SignatureLib.Signature[] memory _signatures,
     bytes calldata _body
   ) external override(IRollup) {
+    if (_canPrune()) {
+      _prune();
+    }
     bytes32 txsEffectsHash = TxsDecoder.decode(_body);
 
     // Decode and validate header
@@ -313,6 +316,9 @@ contract Rollup is Leonidas, IRollup, ITestRollup {
     bytes calldata _aggregationObject,
     bytes calldata _proof
   ) external override(IRollup) {
+    if (_canPrune()) {
+      _prune();
+    }
     HeaderLib.Header memory header = HeaderLib.decode(_header);
 
     if (header.globalVariables.blockNumber > tips.pendingBlockNumber) {
@@ -576,7 +582,10 @@ contract Rollup is Leonidas, IRollup, ITestRollup {
   }
 
   function _canPrune() internal view returns (bool) {
-    if (tips.pendingBlockNumber == tips.provenBlockNumber) {
+    if (
+      tips.pendingBlockNumber == tips.provenBlockNumber
+        || tips.pendingBlockNumber <= assumeProvenThroughBlockNumber
+    ) {
       return false;
     }
 
diff --git a/l1-contracts/test/Rollup.t.sol b/l1-contracts/test/Rollup.t.sol
index 4ffa3e11801..27e20595c59 100644
--- a/l1-contracts/test/Rollup.t.sol
+++ b/l1-contracts/test/Rollup.t.sol
@@ -455,6 +455,15 @@ contract RollupTest is DecoderBase {
     assertNotEq(minHeightEmpty, minHeightMixed, "Invalid min height");
   }
 
+  function testPruneDuringPropose() public setUpFor("mixed_block_1") {
+    _testBlock("mixed_block_1", false);
+    warpToL2Slot(Constants.AZTEC_EPOCH_DURATION * 2);
+    _testBlock("mixed_block_1", false, Constants.AZTEC_EPOCH_DURATION * 2);
+
+    assertEq(rollup.getPendingBlockNumber(), 1, "Invalid pending block number");
+    assertEq(rollup.getProvenBlockNumber(), 0, "Invalid proven block number");
+  }
+
   function testBlockFee() public setUpFor("mixed_block_1") {
     uint256 feeAmount = 2e18;
 
diff --git a/yarn-project/end-to-end/src/e2e_cheat_codes.test.ts b/yarn-project/end-to-end/src/e2e_cheat_codes.test.ts
index 27d7124d6c5..86d78c83674 100644
--- a/yarn-project/end-to-end/src/e2e_cheat_codes.test.ts
+++ b/yarn-project/end-to-end/src/e2e_cheat_codes.test.ts
@@ -9,9 +9,20 @@ import {
   type Wallet,
   computeSecretHash,
 } from '@aztec/aztec.js';
+import { RollupAbi } from '@aztec/l1-artifacts';
 import { TokenContract } from '@aztec/noir-contracts.js';
 
-import { type Account, type Chain, type HttpTransport, type PublicClient, type WalletClient, parseEther } from 'viem';
+import {
+  type Account,
+  type Chain,
+  type GetContractReturnType,
+  type HttpTransport,
+  type PublicClient,
+  type WalletClient,
+  getContract,
+  parseEther,
+} from 'viem';
+import type * as chains from 'viem/chains';
 
 import { setup } from './fixtures/utils.js';
 
@@ -22,6 +33,7 @@ describe('e2e_cheat_codes', () => {
   let pxe: PXE;
   let teardown: () => Promise<void>;
 
+  let rollup: GetContractReturnType<typeof RollupAbi, WalletClient<HttpTransport, chains.Chain, Account>>;
   let walletClient: WalletClient<HttpTransport, Chain, Account>;
   let publicClient: PublicClient<HttpTransport, Chain>;
   let token: TokenContract;
@@ -34,9 +46,19 @@ describe('e2e_cheat_codes', () => {
     publicClient = deployL1ContractsValues.publicClient;
     admin = wallet.getCompleteAddress();
 
+    rollup = getContract({
+      address: deployL1ContractsValues.l1ContractAddresses.rollupAddress.toString(),
+      abi: RollupAbi,
+      client: deployL1ContractsValues.walletClient,
+    });
+
     token = await TokenContract.deploy(wallet, admin, 'TokenName', 'TokenSymbol', 18).send().deployed();
   });
 
+  beforeEach(async () => {
+    await rollup.write.setAssumeProvenThroughBlockNumber([(await rollup.read.getPendingBlockNumber()) + 1n]);
+  });
+
   afterAll(() => teardown());
 
   describe('L1 cheatcodes', () => {
diff --git a/yarn-project/end-to-end/src/e2e_lending_contract.test.ts b/yarn-project/end-to-end/src/e2e_lending_contract.test.ts
index 821d30fdd8c..9938cc6470b 100644
--- a/yarn-project/end-to-end/src/e2e_lending_contract.test.ts
+++ b/yarn-project/end-to-end/src/e2e_lending_contract.test.ts
@@ -11,7 +11,7 @@ import {
 import { RollupAbi } from '@aztec/l1-artifacts';
 import { LendingContract, PriceFeedContract, TokenContract } from '@aztec/noir-contracts.js';
 
-import { jest } from '@jest/globals';
+import { afterAll, jest } from '@jest/globals';
 import { getContract } from 'viem';
 
 import { publicDeployAccounts, setup } from './fixtures/utils.js';
@@ -71,7 +71,7 @@ describe('e2e_lending_contract', () => {
     const rollup = getContract({
       address: deployL1ContractsValues.l1ContractAddresses.rollupAddress.toString(),
       abi: RollupAbi,
-      client: deployL1ContractsValues.publicClient,
+      client: deployL1ContractsValues.walletClient,
     });
 
     lendingAccount = new LendingAccount(wallet.getAddress(), new Fr(42));
diff --git a/yarn-project/end-to-end/src/simulators/lending_simulator.ts b/yarn-project/end-to-end/src/simulators/lending_simulator.ts
index 06d258bb51b..557677b5da4 100644
--- a/yarn-project/end-to-end/src/simulators/lending_simulator.ts
+++ b/yarn-project/end-to-end/src/simulators/lending_simulator.ts
@@ -5,7 +5,8 @@ import { pedersenHash } from '@aztec/foundation/crypto';
 import { type RollupAbi } from '@aztec/l1-artifacts';
 import { type LendingContract } from '@aztec/noir-contracts.js/Lending';
 
-import { type Chain, type GetContractReturnType, type HttpTransport, type PublicClient } from 'viem';
+import { type Account, type GetContractReturnType, type HttpTransport, type WalletClient } from 'viem';
+import type * as chains from 'viem/chains';
 
 import { type TokenSimulator } from './token_simulator.js';
 
@@ -81,7 +82,7 @@ export class LendingSimulator {
     private account: LendingAccount,
     private rate: bigint,
     /** the rollup contract */
-    public rollup: GetContractReturnType<typeof RollupAbi, PublicClient<HttpTransport, Chain>>,
+    public rollup: GetContractReturnType<typeof RollupAbi, WalletClient<HttpTransport, chains.Chain, Account>>,
     /** the lending contract */
     public lendingContract: LendingContract,
     /** the collateral asset used in the lending contract */
@@ -110,6 +111,8 @@ export class LendingSimulator {
 
     // Mine ethereum blocks such that the next block will be in a new slot
     await this.cc.eth.warp(this.time - ETHEREUM_SLOT_DURATION);
+
+    await this.rollup.write.setAssumeProvenThroughBlockNumber([(await this.rollup.read.getPendingBlockNumber()) + 1n]);
     this.accumulator = muldivDown(this.accumulator, computeMultiplier(this.rate, BigInt(timeDiff)), BASE);
   }