diff --git a/exchanges/execute/src/execute.test.ts b/exchanges/execute/src/execute.test.ts
index d9517a16af..c4070fd165 100644
--- a/exchanges/execute/src/execute.test.ts
+++ b/exchanges/execute/src/execute.test.ts
@@ -196,6 +196,7 @@ describe('on operation', () => {
 
     fetchMock.mockResolvedValue({
       status: 200,
+      headers: { get: () => 'application/json' },
       text: vi
         .fn()
         .mockResolvedValue(JSON.stringify({ data: mockHttpResponseData })),
diff --git a/exchanges/graphcache/src/offlineExchange.test.ts b/exchanges/graphcache/src/offlineExchange.test.ts
index bc0d9b7482..a6ffebc98c 100644
--- a/exchanges/graphcache/src/offlineExchange.test.ts
+++ b/exchanges/graphcache/src/offlineExchange.test.ts
@@ -62,7 +62,11 @@ const storage = {
 
 describe('storage', () => {
   it('should read the metadata and dispatch operations on initialization', () => {
-    const client = createClient({ url: 'http://0.0.0.0' });
+    const client = createClient({
+      url: 'http://0.0.0.0',
+      exchanges: [],
+    });
+
     const reexecuteOperation = vi
       .spyOn(client, 'reexecuteOperation')
       .mockImplementation(() => undefined);
@@ -100,7 +104,11 @@ describe('offline', () => {
   it('should intercept errored mutations', () => {
     const onlineSpy = vi.spyOn(navigator, 'onLine', 'get');
 
-    const client = createClient({ url: 'http://0.0.0.0' });
+    const client = createClient({
+      url: 'http://0.0.0.0',
+      exchanges: [],
+    });
+
     const queryOp = client.createRequestOperation('query', {
       key: 1,
       query: queryOne,
diff --git a/exchanges/multipart-fetch/src/multipartFetchExchange.test.ts b/exchanges/multipart-fetch/src/multipartFetchExchange.test.ts
index efd1aea556..f336ce68bf 100644
--- a/exchanges/multipart-fetch/src/multipartFetchExchange.test.ts
+++ b/exchanges/multipart-fetch/src/multipartFetchExchange.test.ts
@@ -59,6 +59,7 @@ describe('on success', () => {
   beforeEach(() => {
     fetch.mockResolvedValue({
       status: 200,
+      headers: { get: () => 'application/json' },
       text: vi.fn().mockResolvedValue(response),
     });
   });
@@ -128,6 +129,7 @@ describe('on error', () => {
   beforeEach(() => {
     fetch.mockResolvedValue({
       status: 400,
+      headers: { get: () => 'application/json' },
       text: vi.fn().mockResolvedValue('{}'),
     });
   });
@@ -163,6 +165,7 @@ describe('on error', () => {
   it('ignores the error when a result is available', async () => {
     fetch.mockResolvedValue({
       status: 400,
+      headers: { get: () => 'application/json' },
       text: vi.fn().mockResolvedValue(response),
     });
 
diff --git a/exchanges/persisted-fetch/src/persistedFetchExchange.test.ts b/exchanges/persisted-fetch/src/persistedFetchExchange.test.ts
index 6fe67ff700..76b81e06c3 100644
--- a/exchanges/persisted-fetch/src/persistedFetchExchange.test.ts
+++ b/exchanges/persisted-fetch/src/persistedFetchExchange.test.ts
@@ -36,6 +36,8 @@ it('accepts successful persisted query responses', async () => {
   });
 
   fetch.mockResolvedValueOnce({
+    status: 200,
+    headers: { get: () => 'application/json' },
     text: () => Promise.resolve(expected),
   });
 
@@ -63,9 +65,13 @@ it('supports cache-miss persisted query errors', async () => {
 
   fetch
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedMiss),
     })
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedRetry),
     });
 
@@ -94,9 +100,13 @@ it('supports GET exclusively for persisted queries', async () => {
 
   fetch
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedMiss),
     })
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedRetry),
     });
 
@@ -127,12 +137,18 @@ it('supports unsupported persisted query errors', async () => {
 
   fetch
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedMiss),
     })
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedRetry),
     })
     .mockResolvedValueOnce({
+      status: 200,
+      headers: { get: () => 'application/json' },
       text: () => Promise.resolve(expectedRetry),
     });
 
diff --git a/packages/svelte-urql/src/mutationStore.test.ts b/packages/svelte-urql/src/mutationStore.test.ts
index 525141e6fc..3bd80a6048 100644
--- a/packages/svelte-urql/src/mutationStore.test.ts
+++ b/packages/svelte-urql/src/mutationStore.test.ts
@@ -6,9 +6,14 @@ import { vi, expect, it, describe } from 'vitest';
 import { mutationStore } from './mutationStore';
 
 describe('mutationStore', () => {
-  const client = createClient({ url: 'https://example.com' });
+  const client = createClient({
+    url: 'noop',
+    exchanges: [],
+  });
+
   const variables = {};
   const context = {};
+
   const query =
     'mutation ($input: Example!) { doExample(input: $input) { id } }';
   const store = mutationStore({
@@ -26,14 +31,13 @@ describe('mutationStore', () => {
 
   it('fills the store with correct values', () => {
     expect(get(store).operation.kind).toBe('mutation');
-    expect(get(store).operation.context.url).toBe('https://example.com');
+    expect(get(store).operation.context.url).toBe('noop');
     expect(get(store).operation.variables).toBe(variables);
 
     expect(print(get(store).operation.query)).toMatchInlineSnapshot(`
       "mutation ($input: Example!) {
         doExample(input: $input) {
           id
-          __typename
         }
       }"
     `);
diff --git a/packages/svelte-urql/src/queryStore.test.ts b/packages/svelte-urql/src/queryStore.test.ts
index 02053e348a..de497d7742 100644
--- a/packages/svelte-urql/src/queryStore.test.ts
+++ b/packages/svelte-urql/src/queryStore.test.ts
@@ -5,7 +5,11 @@ import { get } from 'svelte/store';
 import { queryStore } from './queryStore';
 
 describe('queryStore', () => {
-  const client = createClient({ url: 'https://example.com' });
+  const client = createClient({
+    url: 'https://example.com',
+    exchanges: [],
+  });
+
   const variables = {};
   const context = {};
   const query = '{ test }';
diff --git a/packages/svelte-urql/src/subscriptionStore.test.ts b/packages/svelte-urql/src/subscriptionStore.test.ts
index f522e50680..c1929f3c86 100644
--- a/packages/svelte-urql/src/subscriptionStore.test.ts
+++ b/packages/svelte-urql/src/subscriptionStore.test.ts
@@ -5,7 +5,11 @@ import { vi, expect, it, describe } from 'vitest';
 import { subscriptionStore } from './subscriptionStore';
 
 describe('subscriptionStore', () => {
-  const client = createClient({ url: 'https://example.com' });
+  const client = createClient({
+    url: 'https://example.com',
+    exchanges: [],
+  });
+
   const variables = {};
   const context = {};
   const query = `subscription ($input: ExampleInput) { exampleSubscribe(input: $input) { data } }`;