diff --git a/packages/phone-number-privacy/signer/test/end-to-end/disabled-apis.test.ts b/packages/phone-number-privacy/signer/test/end-to-end/disabled-apis.test.ts
index 85b14405f..594c6888a 100644
--- a/packages/phone-number-privacy/signer/test/end-to-end/disabled-apis.test.ts
+++ b/packages/phone-number-privacy/signer/test/end-to-end/disabled-apis.test.ts
@@ -20,8 +20,7 @@ import {
 } from '@celo/phone-number-privacy-common'
 import { defined, noBool, noNumber, noString } from '@celo/utils/lib/sign-typed-data-utils'
 import { LocalWallet } from '@celo/wallet-local'
-import fetch from 'node-fetch'
-
+import 'isomorphic-fetch'
 require('dotenv').config()
 
 const { ACCOUNT_ADDRESS1, BLINDED_PHONE_NUMBER, PRIVATE_KEY1 } = TestUtils.Values
diff --git a/packages/phone-number-privacy/signer/test/end-to-end/domain.test.ts b/packages/phone-number-privacy/signer/test/end-to-end/domain.test.ts
index 8539831b8..019da1422 100644
--- a/packages/phone-number-privacy/signer/test/end-to-end/domain.test.ts
+++ b/packages/phone-number-privacy/signer/test/end-to-end/domain.test.ts
@@ -27,7 +27,7 @@ import {
 import { DomainRequest } from '@celo/phone-number-privacy-common/src'
 import { defined, noBool, noNumber, noString } from '@celo/utils/lib/sign-typed-data-utils'
 import { LocalWallet } from '@celo/wallet-local'
-import fetch, { Response } from 'node-fetch'
+import 'isomorphic-fetch'
 import { getTestParamsForContext } from './utils'
 const { ACCOUNT_ADDRESS1, PRIVATE_KEY1 } = TestUtils.Values
 
diff --git a/packages/phone-number-privacy/signer/test/end-to-end/pnp.test.ts b/packages/phone-number-privacy/signer/test/end-to-end/pnp.test.ts
index 0b726d83d..8be4b6f10 100644
--- a/packages/phone-number-privacy/signer/test/end-to-end/pnp.test.ts
+++ b/packages/phone-number-privacy/signer/test/end-to-end/pnp.test.ts
@@ -15,7 +15,7 @@ import {
 } from '@celo/phone-number-privacy-common'
 import threshold_bls from 'blind-threshold-bls'
 import { randomBytes } from 'crypto'
-import fetch, { Response } from 'node-fetch'
+import 'isomorphic-fetch'
 import { config } from '../../src/config'
 import { getBlindedPhoneNumber, getTestParamsForContext } from './utils'