diff --git a/packages/keyring-eth-ledger-bridge/src/ledger-mobile-bridge.test.ts b/packages/keyring-eth-ledger-bridge/src/ledger-mobile-bridge.test.ts
index a316c1b..71a3d4d 100644
--- a/packages/keyring-eth-ledger-bridge/src/ledger-mobile-bridge.test.ts
+++ b/packages/keyring-eth-ledger-bridge/src/ledger-mobile-bridge.test.ts
@@ -1,10 +1,15 @@
 import ledgerService from '@ledgerhq/hw-app-eth/lib/services/ledger';
+import type { DeviceModel } from "@ledgerhq/devices";
 import Transport from '@ledgerhq/hw-transport';
 
 import { MetaMaskLedgerHwAppEth } from './ledger-hw-app';
 import { LedgerMobileBridge } from './ledger-mobile-bridge';
 import { LedgerTransportMiddleware } from './ledger-transport-middleware';
 
+type MockDeviceModel = {
+  id: string,
+};
+
 const DEVICE_ID = 'DEVICE_ID';
 
 describe('LedgerMobileBridge', function () {
@@ -25,7 +30,7 @@ describe('LedgerMobileBridge', function () {
   };
 
   const mockTransport = {
-    deviceModel: {} || null,
+    deviceModel: { id: '' } as MockDeviceModel, // Will be set by `beforeEach`
     send: jest.fn(),
     close: jest.fn(),
     decorateAppAPIMethods: jest.fn(),
@@ -220,8 +225,8 @@ describe('LedgerMobileBridge', function () {
       );
     });
 
-    it('throws error when transport.deviceMode is not set', async function () {
-      mockTransport.deviceModel = null;
+    it('throws error when transport.deviceModel is not set', async function () {
+      mockTransport.deviceModel = null as unknown as MockDeviceModel;
       await expect(
         bridge.updateTransportMethod(mockTransport as unknown as Transport),
       ).rejects.toThrow(
diff --git a/packages/keyring-snap-bridge/src/SnapKeyring.test.ts b/packages/keyring-snap-bridge/src/SnapKeyring.test.ts
index 105f652..57fb9da 100644
--- a/packages/keyring-snap-bridge/src/SnapKeyring.test.ts
+++ b/packages/keyring-snap-bridge/src/SnapKeyring.test.ts
@@ -394,7 +394,7 @@ describe('SnapKeyring', () => {
 
       it('fails when the EthMethod is not supported after update', async () => {
         // Update first account to remove `EthMethod.PersonalSign`
-        let updatedMethods = Object.values(EthMethod).filter(
+        let updatedMethods: EthMethod[] = Object.values(EthMethod).filter(
           (method) => method !== EthMethod.PersonalSign,
         );
         expect(