diff --git a/e2e/__snapshots__/dev.test.ts.snap b/e2e/__snapshots__/dev.test.ts.snap
new file mode 100644
index 00000000..dc977874
--- /dev/null
+++ b/e2e/__snapshots__/dev.test.ts.snap
@@ -0,0 +1,35 @@
+// Vitest Snapshot v1
+
+exports[`dev rpc > setStroages 1`] = `"5F98oWfz2r5rcRVnP9VCndg33DAAsky3iuoBSpaPUbgN9AJn"`;
+
+exports[`dev rpc > setStroages 2`] = `"5FA9nQDVg267DEd8m1ZypXLBnvN7SFxYwV7ndqSYGiN9TTpu"`;
+
+exports[`dev rpc > setStroages 3`] = `
+{
+  "consumers": 0,
+  "data": {
+    "feeFrozen": 0,
+    "free": 1000000000000,
+    "miscFrozen": 0,
+    "reserved": 0,
+  },
+  "nonce": 0,
+  "providers": 1,
+  "sufficients": 0,
+}
+`;
+
+exports[`dev rpc > setStroages 4`] = `
+{
+  "consumers": 0,
+  "data": {
+    "feeFrozen": 0,
+    "free": 0,
+    "miscFrozen": 0,
+    "reserved": 0,
+  },
+  "nonce": 0,
+  "providers": 0,
+  "sufficients": 0,
+}
+`;
diff --git a/e2e/author.test.ts b/e2e/author.test.ts
index 5bd0cf9f..0f882fc3 100644
--- a/e2e/author.test.ts
+++ b/e2e/author.test.ts
@@ -1,15 +1,11 @@
-import { Keyring } from '@polkadot/keyring'
 import { describe, expect, it } from 'vitest'
 
-import { api, dev, expectJson, mockCallback } from './helper'
+import { api, dev, expectJson, mockCallback, testingPairs } from './helper'
 
 describe('author rpc', () => {
   it('works', async () => {
-    const keyring = new Keyring({ type: 'ed25519' }) // cannot use sr25519 as it is non determinstic
-    const alice = keyring.addFromUri('//Alice')
-    const bob = keyring.addFromUri('//Bob')
+    const { alice, bob } = testingPairs()
 
-    console.log(alice.address, bob.address)
     {
       const { callback, next } = mockCallback()
       await api.tx.balances.transfer(bob.address, 100).signAndSend(alice, callback)
diff --git a/e2e/dev.test.ts b/e2e/dev.test.ts
new file mode 100644
index 00000000..920621ac
--- /dev/null
+++ b/e2e/dev.test.ts
@@ -0,0 +1,32 @@
+import { describe, it } from 'vitest'
+import { u8aToHex } from '@polkadot/util'
+
+import { api, dev, expectJson, testingPairs } from './helper'
+
+describe('dev rpc', () => {
+  it('setStroages', async () => {
+    const { alice, test1 } = testingPairs()
+
+    await expectJson(api.query.sudo.key()).toMatchSnapshot()
+
+    await dev.setStorages({
+      [api.query.sudo.key.key()]: u8aToHex(alice.addressRaw),
+    })
+
+    await expectJson(api.query.sudo.key()).toMatchSnapshot()
+
+    await api.tx.sudo.sudo(api.tx.balances.setBalance(test1.address, 1000000000000, 0)).signAndSend(alice)
+    const hash = await dev.newBlock()
+
+    await expectJson(api.query.system.account(test1.address)).toMatchSnapshot()
+
+    await dev.setStorages(
+      {
+        [api.query.system.account.key(test1.address)]: null,
+      },
+      hash
+    )
+
+    await expectJson(api.query.system.account(test1.address)).toMatchSnapshot()
+  })
+})
diff --git a/e2e/helper.ts b/e2e/helper.ts
index 51571388..cf2fa7b0 100644
--- a/e2e/helper.ts
+++ b/e2e/helper.ts
@@ -1,5 +1,6 @@
 import { ApiPromise, WsProvider } from '@polkadot/api'
 import { Codec } from '@polkadot/types/types'
+import { Keyring } from '@polkadot/keyring'
 import { beforeAll, beforeEach, expect, vi } from 'vitest'
 
 import { Blockchain } from '../src/blockchain'
@@ -92,9 +93,12 @@ export const expectHex = (codec: CodecOrArray | Promise<CodecOrArray>) => {
 }
 
 export const dev = {
-  newBlock: () => {
+  newBlock: (): Promise<string> => {
     return ws.send('dev_newBlock', [])
   },
+  setStorages: (values: Record<string, string | null>, blockHash?: string) => {
+    return ws.send('dev_setStorages', [values, blockHash])
+  },
 }
 
 function defer<T>() {
@@ -122,3 +126,24 @@ export const mockCallback = () => {
 }
 
 export const delay = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms))
+
+export const testingPairs = () => {
+  const keyring = new Keyring({ type: 'ed25519' }) // cannot use sr25519 as it is non determinstic
+  const alice = keyring.addFromUri('//Alice')
+  const bob = keyring.addFromUri('//Bob')
+  const charlie = keyring.addFromUri('//Charlie')
+  const dave = keyring.addFromUri('//Dave')
+  const eve = keyring.addFromUri('//Eve')
+  const test1 = keyring.addFromUri('//test1')
+  const test2 = keyring.addFromUri('//test2')
+  return {
+    alice,
+    bob,
+    charlie,
+    dave,
+    eve,
+    test1,
+    test2,
+    keyring,
+  }
+}
diff --git a/src/blockchain/index.ts b/src/blockchain/index.ts
index bb641185..b5b53e39 100644
--- a/src/blockchain/index.ts
+++ b/src/blockchain/index.ts
@@ -66,7 +66,10 @@ export class Blockchain {
     return this.#blocksByNumber[number]
   }
 
-  async getBlock(hash: string = this.head.hash): Promise<Block | undefined> {
+  async getBlock(hash?: string): Promise<Block | undefined> {
+    if (hash == null) {
+      hash = this.head.hash
+    }
     if (!this.#blocksByHash[hash]) {
       try {
         const header = await this.#api.rpc.chain.getHeader(hash)
diff --git a/src/rpc/dev.ts b/src/rpc/dev.ts
index a053274d..df5fc19d 100644
--- a/src/rpc/dev.ts
+++ b/src/rpc/dev.ts
@@ -9,11 +9,18 @@ const handlers: Handlers = {
     logger.debug({ hash: block.hash }, 'dev_newBlock')
     return block.hash
   },
-  dev_setStroages: async (context, [values, blockHash]) => {
+  dev_setStorages: async (context, [values, blockHash]) => {
     const block = await context.chain.getBlock(blockHash)
     if (!block) {
       throw new ResponseError(1, `Block ${blockHash} not found`)
     }
+    logger.debug(
+      {
+        hash: block.hash,
+        values,
+      },
+      'dev_setStorages'
+    )
     block.pushStorageLayer().setAll(values)
     return block.hash
   },