diff --git a/packages/arb-token-bridge-ui/src/util/deposits/__tests__/depositsHelpers.test.ts b/packages/arb-token-bridge-ui/src/util/deposits/__tests__/depositsHelpers.test.ts
new file mode 100644
index 0000000000..1b67c84e8d
--- /dev/null
+++ b/packages/arb-token-bridge-ui/src/util/deposits/__tests__/depositsHelpers.test.ts
@@ -0,0 +1,45 @@
+import { describe, expect, it, vi } from 'vitest'
+import {
+  getParentToChildMessageDataFromParentTxHash,
+  updateAdditionalDepositData
+} from '../helpers'
+import { Transaction } from '../../../types/Transactions'
+import { AssetType } from '../../../hooks/arbTokenBridge.types'
+
+vi.mock(import('../helpers'), async importOriginal => {
+  const actual = await importOriginal()
+  return {
+    ...actual,
+    getParentToChildMessageDataFromParentTxHash: vi.fn()
+  }
+})
+
+describe('updateAdditionalDepositData', () => {
+  const mockedGetParentToChildMessageDataFromParentTxHash = vi.mocked(
+    getParentToChildMessageDataFromParentTxHash
+  )
+
+  it('does not update tx if parent to child message is not found for deposit tx', async () => {
+    mockedGetParentToChildMessageDataFromParentTxHash.mockResolvedValue({})
+
+    const tx: Transaction = {
+      type: 'deposit',
+      direction: 'deposit',
+      source: 'subgraph',
+      parentChainId: 1,
+      childChainId: 42161,
+      l1NetworkID: '1',
+      txID: '0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef',
+      blockNumber: 12345678,
+      value: '1000000000000000000', // 1 ETH in wei
+      status: 'pending',
+      assetName: 'ETH',
+      assetType: AssetType.ETH,
+      sender: '0xabcdefabcdefabcdefabcdefabcdefabcdefabcd',
+      destination: '0x1234567890123456789012345678901234567890'
+    }
+    const result = await updateAdditionalDepositData(tx)
+
+    expect(result).toEqual(tx)
+  })
+})