diff --git a/.changelog/2081.internal.md b/.changelog/2081.internal.md
new file mode 100644
index 0000000000..13cad5e01d
--- /dev/null
+++ b/.changelog/2081.internal.md
@@ -0,0 +1 @@
+Test hardcoded Paratime withdraw gas limit
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts
new file mode 100644
index 0000000000..c81303f025
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts
@@ -0,0 +1,65 @@
+import { test, expect } from '@playwright/test'
+import { paraTimesConfig } from '../../src/config'
+
+for (const net of ['mainnet', 'testnet']) {
+  for (const paratime of ['sapphire', 'emerald', 'cipher']) {
+    test(`Check if hardcoded Paratime withdraw gas limit needs to be updated: ${net} ${paratime}`, async ({
+      page,
+    }) => {
+      await page.goto('/e2e')
+
+      const estimatedGas = await page.evaluate(
+        async ([net, paratime, paraTimesConfig]) => {
+          const oasis: typeof import('@oasisprotocol/client') = (window as any).oasis
+          const oasisRT: typeof import('@oasisprotocol/client-rt') = (window as any).oasisRT
+
+          const nic =
+            net === 'mainnet'
+              ? new oasis.client.NodeInternal('https://grpc.oasis.io')
+              : new oasis.client.NodeInternal('https://testnet.grpc.oasis.io')
+
+          const txWrapper = new oasisRT.consensusAccounts.Wrapper(
+            oasis.misc.fromHex(paraTimesConfig[paratime][net].runtimeId!),
+          )
+            .callDeposit()
+            .setBody({
+              amount: [
+                oasis.quantity.fromBigInt(10n ** 18n * 1000000000n),
+                oasisRT.token.NATIVE_DENOMINATION,
+              ],
+              to: oasis.staking.addressFromBech32(
+                // await getEvmBech32Address('0x0000000000000000000000000000000000000000')
+                'oasis1qq2v39p9fqk997vk6742axrzqyu9v2ncyuqt8uek',
+              ),
+            })
+            .setFeeAmount([oasis.quantity.fromBigInt(10n ** 18n), oasisRT.token.NATIVE_DENOMINATION])
+            .setFeeGas(10n ** 18n)
+            .setFeeConsensusMessages(1)
+            .setSignerInfo([
+              {
+                address_spec: {
+                  signature: {
+                    ed25519: oasis.signature.NaclSigner.fromRandom('this key is not important').public(),
+                  },
+                },
+                nonce: 10000n,
+              },
+            ])
+
+          const estimatedGas = await new oasisRT.core.Wrapper(
+            oasis.misc.fromHex(paraTimesConfig[paratime][net].runtimeId!),
+          )
+            .queryEstimateGas()
+            .setArgs({ tx: txWrapper.transaction })
+            .query(nic)
+
+          return estimatedGas
+        },
+        [net, paratime, paraTimesConfig] as const,
+      )
+
+      expect(estimatedGas.toString()).toMatchSnapshot()
+      expect(estimatedGas).toBeLessThan(paraTimesConfig[paratime].feeGas)
+    })
+  }
+}
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-cipher-1-main-linux.txt b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-cipher-1-main-linux.txt
new file mode 100644
index 0000000000..f46dba18d2
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-cipher-1-main-linux.txt
@@ -0,0 +1 @@
+4106320
\ No newline at end of file
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-emerald-1-main-linux.txt b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-emerald-1-main-linux.txt
new file mode 100644
index 0000000000..0a2fd0af9e
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-emerald-1-main-linux.txt
@@ -0,0 +1 @@
+61316
\ No newline at end of file
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-sapphire-1-main-linux.txt b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-sapphire-1-main-linux.txt
new file mode 100644
index 0000000000..0a2fd0af9e
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-mainnet-sapphire-1-main-linux.txt
@@ -0,0 +1 @@
+61316
\ No newline at end of file
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-cipher-1-main-linux.txt b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-cipher-1-main-linux.txt
new file mode 100644
index 0000000000..f46dba18d2
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-cipher-1-main-linux.txt
@@ -0,0 +1 @@
+4106320
\ No newline at end of file
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-emerald-1-main-linux.txt b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-emerald-1-main-linux.txt
new file mode 100644
index 0000000000..0a2fd0af9e
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-emerald-1-main-linux.txt
@@ -0,0 +1 @@
+61316
\ No newline at end of file
diff --git a/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-sapphire-1-main-linux.txt b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-sapphire-1-main-linux.txt
new file mode 100644
index 0000000000..0a2fd0af9e
--- /dev/null
+++ b/playwright/tests/monitor-paratime-withdraw-gas.spec.ts-snapshots/Check-if-hardcoded-Paratime-withdraw-gas-limit-needs-to-be-updated-testnet-sapphire-1-main-linux.txt
@@ -0,0 +1 @@
+61316
\ No newline at end of file
diff --git a/src/app/pages/E2EPage/index.tsx b/src/app/pages/E2EPage/index.tsx
index 058f072f56..951e91f295 100644
--- a/src/app/pages/E2EPage/index.tsx
+++ b/src/app/pages/E2EPage/index.tsx
@@ -9,6 +9,7 @@ import { useNavigate } from 'react-router-dom'
 import * as monitor from 'vendors/monitor'
 import * as oasisscan from 'vendors/oasisscan'
 import * as oasis from '@oasisprotocol/client'
+import * as oasisRT from '@oasisprotocol/client-rt'
 import { useDispatch, useStore } from 'react-redux'
 import { walletActions } from '../../state/wallet'
 import { AlertBox, AlertBoxStatus } from '../../components/AlertBox'
@@ -33,6 +34,7 @@ interface e2eWindow extends Window {
   monitor: any
   oasisscan: any
   oasis: any
+  oasisRT: any
   store: any
 }
 declare const window: e2eWindow
@@ -43,6 +45,7 @@ function ExposeInternals() {
     window.monitor = monitor
     window.oasisscan = oasisscan
     window.oasis = oasis
+    window.oasisRT = oasisRT
     window.store = store
     return () => {
       // Keep globals even after redirecting away
diff --git a/src/config.ts b/src/config.ts
index 32fce17c9a..d36d2d8e83 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -177,7 +177,7 @@ export const paraTimesConfig: ParaTimesConfig = {
 }
 
 // https://github.com/mozilla/webextension-polyfill/blob/6e3e26c/src/browser-polyfill.js#L9
-export const runtimeIs = (window as any).chrome?.runtime?.id ? 'extension' : 'webapp'
+export const runtimeIs = (globalThis as any).chrome?.runtime?.id ? 'extension' : 'webapp'
 
 export const deploys = {
   production: 'https://wallet.oasis.io',