diff --git a/mockwebserver/src/main/java/com/squareup/okhttp/mockwebserver/MockWebServer.java b/mockwebserver/src/main/java/com/squareup/okhttp/mockwebserver/MockWebServer.java
index 6c5f5f896..fd9267e7a 100644
--- a/mockwebserver/src/main/java/com/squareup/okhttp/mockwebserver/MockWebServer.java
+++ b/mockwebserver/src/main/java/com/squareup/okhttp/mockwebserver/MockWebServer.java
@@ -581,9 +581,20 @@ public final class MockWebServer {
 
     InputStream in = response.getBodyStream();
     if (in == null) return;
+    sleepIfDelayed(response);
     throttledTransfer(response, socket, in, out, Long.MAX_VALUE);
   }
 
+  private void sleepIfDelayed(MockResponse response) {
+    if (response.getBodyDelayTimeMs() != 0) {
+      try {
+        Thread.sleep(response.getBodyDelayTimeMs());
+      } catch (InterruptedException e) {
+        throw new AssertionError(e);
+      }
+    }
+  }
+
   /**
    * Transfer bytes from {@code in} to {@code out} until either {@code length}
    * bytes have been transferred or {@code in} is exhausted. The transfer is
diff --git a/mockwebserver/src/test/java/com/squareup/okhttp/mockwebserver/MockWebServerTest.java b/mockwebserver/src/test/java/com/squareup/okhttp/mockwebserver/MockWebServerTest.java
index 2b1651f18..62e4ee8a3 100644
--- a/mockwebserver/src/test/java/com/squareup/okhttp/mockwebserver/MockWebServerTest.java
+++ b/mockwebserver/src/test/java/com/squareup/okhttp/mockwebserver/MockWebServerTest.java
@@ -338,4 +338,30 @@ public final class MockWebServerTest extends TestCase {
         assertTrue(String.format("Request + Response: %sms", elapsedMillis), elapsedMillis >= 500);
         assertTrue(String.format("Request + Response: %sms", elapsedMillis), elapsedMillis < 1000);
     }
+
+    /**
+     * Delay the response body by sleeping 1000ms.
+     */
+    public void testDelayResponse() throws IOException {
+        server.enqueue(new MockResponse()
+                .setBody("ABCDEF")
+                .setBodyDelayTimeMs(1000));
+        server.play();
+
+        long startNanos = System.nanoTime();
+        URLConnection connection = server.getUrl("/").openConnection();
+        InputStream in = connection.getInputStream();
+        assertEquals('A', in.read());
+        assertEquals('B', in.read());
+        assertEquals('C', in.read());
+        assertEquals('D', in.read());
+        assertEquals('E', in.read());
+        assertEquals('F', in.read());
+        assertEquals(-1, in.read());
+        long elapsedNanos = System.nanoTime() - startNanos;
+        long elapsedMillis = NANOSECONDS.toMillis(elapsedNanos);
+
+        assertTrue(String.format("Request + Response: %sms", elapsedMillis), elapsedMillis >= 1000);
+        assertTrue(String.format("Request + Response: %sms", elapsedMillis), elapsedMillis <= 1100);
+    }
 }