diff --git a/app/templates/views/api/documentation.html b/app/templates/views/api/documentation.html
index 29eeda48e..f59f58168 100644
--- a/app/templates/views/api/documentation.html
+++ b/app/templates/views/api/documentation.html
@@ -26,6 +26,7 @@
       <a href="{{ url }}" target="_blank" rel="noopener noreferrer">{{ name }}</a>
     </li>
     {% endfor %}
+    <li><a href="{{ url_for("main.integration_testing") }}">Integration testing</a></li>
   </ul>
 
   {{ page_footer(
diff --git a/app/templates/views/integration_testing.html b/app/templates/views/integration_testing.html
index 57039e382..f7bbb2533 100644
--- a/app/templates/views/integration_testing.html
+++ b/app/templates/views/integration_testing.html
@@ -11,15 +11,15 @@
     <h1 class="heading-large">Integration testing</h1>
 
     <p>
-      Service teams should do all their testing within the GOV.UK Notify production environment (https://api.notifications.service.gov.uk).
+      Service teams should do all their testing within the GOV.UK Notify production environment, https://api.notifications.service.gov.uk.
     </p>
     <p>
-        You don’t need different Notify accounts or access to other Notify environments. Instead, there are different types of API key that let you do functional or performance integration testing.
+        You don’t need different Notify accounts or access to other Notify environments. Instead, there are different types of API keys that let you do functional or performance integration testing.
     </p>
 
-    <h2 class="heading-medium">API Keys</h2>
+    <h2 class="heading-medium">Types of API Keys</h2>
     <p>
-        The 3 types of API key that you can create within GOV.UK Notify are:
+        There are 3 types of API key available within GOV.UK Notify:
     </p>
     <ul class="list list-bullet">
       <li>live key - “Send messages to anyone”</li>
@@ -35,7 +35,7 @@
         Messages sent with a live key show up on your dashboard and count against your text message and email allowances.
     </p>
       <p>
-          You should plan to rotate these keys on a regular basis. You may have more than one active key at a time. To revoke the key simply click the revoke button on the API Key page.
+          You should plan to rotate these keys on a regular basis. You may have more than one active key at a time. To revoke the key click the revoke button on the API Key page.
       </p>
 
     <h2 class="heading-medium">Team key</h2>
@@ -43,7 +43,7 @@
      Use a team key for end-to-end functional testing.
     </p>
     <p>
-        A team key lets you send real messages to members of your team (and addresses/numbers that you have added to your whitelist). You will get an error if you use these keys to send messages to anyone else.
+        A team key lets you send real messages to members of your team and addresses/numbers that you have added to your whitelist. You will get an error if you use these keys to send messages to anyone else.
     </p>
     <p>
         Messages sent with a team key show up on your dashboard and count against your text message and email allowances.
@@ -54,7 +54,7 @@
         Use a test key to test the performance of your service and its integration with GOV.UK Notify under load.
       </p>
       <p>
-          A test key doesn’t send real messages but generates realistic responses. There’s no restriction on who you can send to or how many messages you can send per day.
+          Test keys don’t send real messages but do generates realistic responses. There’s no restriction on who you can send to or how many messages you can send per day.
       </p>
       <p>
         Messages sent using a test key don’t show up on your dashboard or count against your text message and email allowances.
@@ -70,6 +70,28 @@
           <li>"temp-fail@simulator.notify" => temporary failure</li>
           <li>"perm-fail@simulator.notify" => permanent failure</li>
       </p>
+
+      <h2 class="heading-medium">Smoke testing your integration</h2>
+      <p>
+         If you need to smoke test your integration with Notify on a regular basis, you should use the smoke test numbers and addresses below.
+      </p>
+      <p>
+         The smoke test numbers and addresses will immediately return a successful response, but won’t send a real message and won’t produce a delivery receipt.
+      </p>
+      <p>
+          You can use the smoke test numbers and addresses with any type of key.
+      </p>
+      <p>
+         If your smoke tests need to fetch a delivery receipt, then use a test key - and don’t use these numbers and addresses.
+
+          <li>“07700900000”</li>
+          <li>“07700900111”</li>
+          <li>“07700900222”</li>
+          <li>“simulate-delivered@notifications.service.gov.uk”</li>
+          <li>“simulate-delivered-2@notifications.service.gov.uk”</li>
+          <li>“simulate-delivered-3@notifications.service.gov.uk”</li>
+      </p>
+
   </div>
 </div>