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diff --git a/core/src/test/java/com/android/volley/RequestQueueIntegrationTest.java b/core/src/test/java/com/android/volley/RequestQueueIntegrationTest.java
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+++ b/core/src/test/java/com/android/volley/RequestQueueIntegrationTest.java
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+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.volley;
+
+import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.timeout;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import com.android.volley.Request.Priority;
+import com.android.volley.RequestQueue.RequestFinishedListener;
+import com.android.volley.mock.MockRequest;
+import com.android.volley.mock.ShadowSystemClock;
+import com.android.volley.toolbox.NoCache;
+import com.android.volley.utils.ImmediateResponseDelivery;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InOrder;
+import org.mockito.Mock;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+
+/**
+ * Integration tests for {@link RequestQueue} that verify its behavior in conjunction with real
+ * dispatcher, queues and Requests.
+ *
+ * <p>The Network is mocked out.
+ */
+@RunWith(RobolectricTestRunner.class)
+@Config(shadows = {ShadowSystemClock.class})
+public class RequestQueueIntegrationTest {
+
+    private ResponseDelivery mDelivery;
+    @Mock private Network mMockNetwork;
+    @Mock private RequestFinishedListener<byte[]> mMockListener;
+    @Mock private RequestFinishedListener<byte[]> mMockListener2;
+
+    @Before
+    public void setUp() throws Exception {
+        mDelivery = new ImmediateResponseDelivery();
+        initMocks(this);
+    }
+
+    @Test
+    public void add_requestProcessedInCorrectOrder() throws Exception {
+        // Enqueue 2 requests with different cache keys, and different priorities. The second,
+        // higher priority request takes 20ms.
+        // Assert that the first request is only handled after the first one has been parsed and
+        // delivered.
+        MockRequest lowerPriorityReq = new MockRequest();
+        MockRequest higherPriorityReq = new MockRequest();
+        lowerPriorityReq.setCacheKey("1");
+        higherPriorityReq.setCacheKey("2");
+        lowerPriorityReq.setPriority(Priority.LOW);
+        higherPriorityReq.setPriority(Priority.HIGH);
+
+        Answer<NetworkResponse> delayAnswer =
+                new Answer<NetworkResponse>() {
+                    @Override
+                    public NetworkResponse answer(InvocationOnMock invocationOnMock)
+                            throws Throwable {
+                        Thread.sleep(20);
+                        return mock(NetworkResponse.class);
+                    }
+                };
+        // delay only for higher request
+        when(mMockNetwork.performRequest(higherPriorityReq)).thenAnswer(delayAnswer);
+        when(mMockNetwork.performRequest(lowerPriorityReq)).thenReturn(mock(NetworkResponse.class));
+
+        RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
+        queue.addRequestFinishedListener(mMockListener);
+        queue.add(lowerPriorityReq);
+        queue.add(higherPriorityReq);
+        queue.start();
+
+        InOrder inOrder = inOrder(mMockListener);
+        // verify higherPriorityReq goes through first
+        inOrder.verify(mMockListener, timeout(10000)).onRequestFinished(higherPriorityReq);
+        // verify lowerPriorityReq goes last
+        inOrder.verify(mMockListener, timeout(10000)).onRequestFinished(lowerPriorityReq);
+
+        queue.stop();
+    }
+
+    /** Asserts that requests with same cache key are processed in order. */
+    @Test
+    public void add_dedupeByCacheKey() throws Exception {
+        // Enqueue 2 requests with the same cache key. The first request takes 20ms. Assert that the
+        // second request is only handled after the first one has been parsed and delivered.
+        MockRequest req1 = new MockRequest();
+        MockRequest req2 = new MockRequest();
+        Answer<NetworkResponse> delayAnswer =
+                new Answer<NetworkResponse>() {
+                    @Override
+                    public NetworkResponse answer(InvocationOnMock invocationOnMock)
+                            throws Throwable {
+                        Thread.sleep(20);
+                        return mock(NetworkResponse.class);
+                    }
+                };
+        // delay only for first
+        when(mMockNetwork.performRequest(req1)).thenAnswer(delayAnswer);
+        when(mMockNetwork.performRequest(req2)).thenReturn(mock(NetworkResponse.class));
+
+        RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 3, mDelivery);
+        queue.addRequestFinishedListener(mMockListener);
+        queue.add(req1);
+        queue.add(req2);
+        queue.start();
+
+        InOrder inOrder = inOrder(mMockListener);
+        // verify req1 goes through first
+        inOrder.verify(mMockListener, timeout(10000)).onRequestFinished(req1);
+        // verify req2 goes last
+        inOrder.verify(mMockListener, timeout(10000)).onRequestFinished(req2);
+
+        queue.stop();
+    }
+
+    /** Verify RequestFinishedListeners are informed when requests are canceled. */
+    @Test
+    public void add_requestFinishedListenerCanceled() throws Exception {
+        MockRequest request = new MockRequest();
+        Answer<NetworkResponse> delayAnswer =
+                new Answer<NetworkResponse>() {
+                    @Override
+                    public NetworkResponse answer(InvocationOnMock invocationOnMock)
+                            throws Throwable {
+                        Thread.sleep(200);
+                        return mock(NetworkResponse.class);
+                    }
+                };
+        RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
+
+        when(mMockNetwork.performRequest(request)).thenAnswer(delayAnswer);
+
+        queue.addRequestFinishedListener(mMockListener);
+        queue.start();
+        queue.add(request);
+
+        request.cancel();
+        verify(mMockListener, timeout(10000)).onRequestFinished(request);
+        queue.stop();
+    }
+
+    /** Verify RequestFinishedListeners are informed when requests are successfully delivered. */
+    @Test
+    public void add_requestFinishedListenerSuccess() throws Exception {
+        MockRequest request = new MockRequest();
+        RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
+
+        queue.addRequestFinishedListener(mMockListener);
+        queue.addRequestFinishedListener(mMockListener2);
+        queue.start();
+        queue.add(request);
+
+        verify(mMockListener, timeout(10000)).onRequestFinished(request);
+        verify(mMockListener2, timeout(10000)).onRequestFinished(request);
+
+        queue.stop();
+    }
+
+    /** Verify RequestFinishedListeners are informed when request errors. */
+    @Test
+    public void add_requestFinishedListenerError() throws Exception {
+        MockRequest request = new MockRequest();
+        RequestQueue queue = new RequestQueue(new NoCache(), mMockNetwork, 1, mDelivery);
+
+        when(mMockNetwork.performRequest(request)).thenThrow(new VolleyError());
+
+        queue.addRequestFinishedListener(mMockListener);
+        queue.start();
+        queue.add(request);
+
+        verify(mMockListener, timeout(10000)).onRequestFinished(request);
+        queue.stop();
+    }
+}