diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index bca44adf61..e919bd7eb3 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -3357,6 +3357,20 @@
     </para>
 </section>
 
+<section id='ref-classes-testsdk'>
+    <title><filename>testsdk.bbclass</filename></title>
+
+    <para>
+        This class supports running automated tests against
+        software development kits (SDKs).
+        The <filename>testsdk</filename> class runs tests on an SDK when
+        called using the following:
+        <literallayout class='monospaced'>
+     $ bitbake -c testsdk image
+        </literallayout>
+    </para>
+</section>
+
 <section id='ref-classes-texinfo'>
     <title><filename>texinfo.bbclass</filename></title>