diff --git a/packages/core/src/api/apis/implementations/OAuthRequestManager/MockOAuthApi.test.ts b/packages/core/src/api/apis/implementations/OAuthRequestManager/MockOAuthApi.test.ts
new file mode 100644
index 0000000000..d6346c688b
--- /dev/null
+++ b/packages/core/src/api/apis/implementations/OAuthRequestManager/MockOAuthApi.test.ts
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import MockOAuthApi from './MockOAuthApi';
+import PowerIcon from '@material-ui/icons/Power';
+import { BasicOAuthScopes } from './BasicOAuthScopes';
+
+describe('MockOAuthApi', () => {
+  it('should trigger all requests', async () => {
+    const popupResult = { is: 'done' };
+    const mock = new MockOAuthApi(popupResult);
+
+    const authHandler1 = jest
+      .fn()
+      .mockImplementation(() => mock.showLoginPopup());
+    const requester1 = mock.createAuthRequester({
+      provider: { icon: PowerIcon, title: 'Test' },
+      onAuthRequest: authHandler1,
+    });
+
+    const authHandler2 = jest.fn().mockResolvedValue('other');
+    const requester2 = mock.createAuthRequester({
+      provider: { icon: PowerIcon, title: 'Test' },
+      onAuthRequest: authHandler2,
+    });
+
+    const promises = [
+      requester1(BasicOAuthScopes.from('a')),
+      requester1(BasicOAuthScopes.from('b')),
+      requester2(BasicOAuthScopes.from('a b')),
+      requester2(BasicOAuthScopes.from('b c')),
+      requester2(BasicOAuthScopes.from('c a')),
+    ];
+
+    await expect(
+      Promise.race([Promise.all(promises), 'waiting']),
+    ).resolves.toBe('waiting');
+
+    await mock.triggerAll();
+
+    await expect(Promise.all(promises)).resolves.toEqual([
+      popupResult,
+      popupResult,
+      'other',
+      'other',
+      'other',
+    ]);
+
+    expect(authHandler1).toHaveBeenCalledTimes(1);
+    expect(authHandler1).toHaveBeenCalledWith(BasicOAuthScopes.from('a b'));
+    expect(authHandler2).toHaveBeenCalledTimes(1);
+    expect(authHandler2).toHaveBeenCalledWith(BasicOAuthScopes.from('a b c'));
+  });
+
+  it('should reject all requests', async () => {
+    const mock = new MockOAuthApi();
+
+    const authHandler1 = jest.fn();
+    const requester1 = mock.createAuthRequester({
+      provider: { icon: PowerIcon, title: 'Test' },
+      onAuthRequest: authHandler1,
+    });
+
+    const authHandler2 = jest.fn();
+    const requester2 = mock.createAuthRequester({
+      provider: { icon: PowerIcon, title: 'Test' },
+      onAuthRequest: authHandler2,
+    });
+
+    const promises = [
+      requester1(BasicOAuthScopes.from('a')),
+      requester1(BasicOAuthScopes.from('b')),
+      requester2(BasicOAuthScopes.from('a b')),
+      requester2(BasicOAuthScopes.from('b c')),
+      requester2(BasicOAuthScopes.from('c a')),
+    ];
+
+    await expect(
+      Promise.race([Promise.all(promises), 'waiting']),
+    ).resolves.toBe('waiting');
+
+    await mock.rejectAll();
+
+    for (const promise of promises) {
+      await expect(promise).rejects.toMatchObject({ name: 'RejectedError' });
+    }
+
+    expect(authHandler1).not.toHaveBeenCalled();
+    expect(authHandler2).not.toHaveBeenCalled();
+  });
+});
diff --git a/packages/core/src/api/apis/implementations/OAuthRequestManager/MockOAuthApi.ts b/packages/core/src/api/apis/implementations/OAuthRequestManager/MockOAuthApi.ts
new file mode 100644
index 0000000000..f52c50dbe5
--- /dev/null
+++ b/packages/core/src/api/apis/implementations/OAuthRequestManager/MockOAuthApi.ts
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {
+  OAuthRequestApi,
+  AuthRequesterOptions,
+  LoginPopupOptions,
+} from '../../definitions';
+import { OAuthRequestManager } from './OAuthRequestManager';
+
+export default class MockOAuthApi implements OAuthRequestApi {
+  private readonly real = new OAuthRequestManager();
+
+  constructor(private readonly popupResult = {}) {}
+
+  createAuthRequester<T>(options: AuthRequesterOptions<T>) {
+    return this.real.createAuthRequester(options);
+  }
+
+  authRequest$() {
+    return this.real.authRequest$();
+  }
+
+  async triggerAll() {
+    await Promise.resolve(); // Wait a tick to allow new requests to get forwarded
+
+    return new Promise((resolve) => {
+      const subscription = this.authRequest$().subscribe((requests) => {
+        subscription.unsubscribe();
+        Promise.all(requests.map((request) => request.trigger())).then(() =>
+          resolve(),
+        );
+      });
+    });
+  }
+
+  async rejectAll() {
+    await Promise.resolve(); // Wait a tick to allow new requests to get forwarded
+
+    return new Promise((resolve) => {
+      const subscription = this.authRequest$().subscribe((requests) => {
+        subscription.unsubscribe();
+        requests.map((request) => request.reject());
+        resolve();
+      });
+    });
+  }
+
+  async showLoginPopup(options?: LoginPopupOptions): Promise<any> {
+    // Working around linter complaints, can't remove options since we want correct mock types
+    return options ? this.popupResult : this.popupResult;
+  }
+}