diff --git a/test/topos-core/ToposMessaging.test.ts b/test/topos-core/ToposMessaging.test.ts
index 5aaec73..08d00bb 100644
--- a/test/topos-core/ToposMessaging.test.ts
+++ b/test/topos-core/ToposMessaging.test.ts
@@ -83,7 +83,10 @@ describe('ToposMessaging', () => {
     await toposCoreProxy.waitForDeployment()
     const toposCoreProxyAddress = await toposCoreProxy.getAddress()
 
-    const toposCore = await ToposCore__factory.connect(toposCoreProxyAddress)
+    const toposCore = await ToposCore__factory.connect(
+      toposCoreProxyAddress,
+      admin
+    )
     await toposCore.initialize(adminAddresses, adminThreshold)
 
     const erc20Messaging = await new ERC20Messaging__factory(admin).deploy(
@@ -764,8 +767,9 @@ describe('ToposMessaging', () => {
     TxUnsigned.gasLimit = estimatedGasLimit
     const address = await signer.getAddress()
     const nonce = await provider.getTransactionCount(address)
+    const feeData = await provider.getFeeData()
     TxUnsigned.nonce = nonce
-    // TxUnsigned.gasPrice = BigInt(await provider.getGasPrice()) // SEDTOBO: verify that the test works without this
+    TxUnsigned.gasPrice = BigInt(feeData.gasPrice!)
 
     const submittedTx = await signer.sendTransaction(TxUnsigned)
     const receipt = await submittedTx.wait()
diff --git a/test/topos-core/shared/utils/mpt_proof.ts b/test/topos-core/shared/utils/mpt_proof.ts
index 9abcc08..bca88db 100644
--- a/test/topos-core/shared/utils/mpt_proof.ts
+++ b/test/topos-core/shared/utils/mpt_proof.ts
@@ -6,16 +6,15 @@ export async function getReceiptMptProof(
   tx: TransactionResponse,
   provider: JsonRpcProvider
 ) {
-  const receipt = await provider.getTransactionReceipt(tx.hash)
-  const prefectTxs = true
-  const block = await provider.getBlock(receipt!.blockHash, prefectTxs)
+  const prefetchTxs = true
+  const block = await provider.getBlock(tx.blockHash!, prefetchTxs)
   const rawBlock = await provider.send('eth_getBlockByHash', [
-    receipt!.blockHash,
-    true,
+    tx.blockHash,
+    prefetchTxs,
   ])
 
   const receiptsRoot = rawBlock.receiptsRoot
-  const trie = await createTrie(block!, provider)
+  const trie = await createTrie(block!)
   const trieRoot = trie.root()
   if ('0x' + trieRoot.toString('hex') !== receiptsRoot) {
     throw new Error(
@@ -41,12 +40,13 @@ export async function getReceiptMptProof(
   return { proofBlob, receiptsRoot }
 }
 
-async function createTrie(block: Block, provider: JsonRpcProvider) {
+async function createTrie(block: Block) {
   const trie = new Trie()
   await Promise.all(
     block.prefetchedTransactions.map(async (tx, index) => {
-      const receipt = await provider.getTransactionReceipt(tx.hash)
+      const receipt = await tx.wait()
       const { cumulativeGasUsed, logs, logsBloom, status } = receipt!
+
       return trie.put(
         Buffer.from(RLP.encode(index)),
         Buffer.from(
@@ -54,7 +54,7 @@ async function createTrie(block: Block, provider: JsonRpcProvider) {
             status,
             Number(cumulativeGasUsed),
             logsBloom,
-            logs.map((l) => [l.address, <string[]>l.topics, l.data]),
+            logs.map((l) => [l.address, l.topics as string[], l.data]),
           ])
         )
       )