diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 3f1814c253..4e9e442757 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -442,7 +442,7 @@
         This class is intended to be inherited globally.
         The default compression mechanism is gz (gzip) but you can
         select an alternative mechanism by setting the
-        <link linkend='var-DOC_COMPRESS'><filename>DOC_COMPRESS</filename>
+        <link linkend='var-DOC_COMPRESS'><filename>DOC_COMPRESS</filename></link>
         variable.
     </para>
 </section>
@@ -2546,6 +2546,22 @@
     </para>
 </section>
 
+<section id='ref-classes-ptest-gnome'>
+    <title><filename>ptest-gnome.bbclass</filename></title>
+
+    <para>
+        Enables package tests (ptests) specifically for GNOME packages,
+        which have tests intended to be executed with
+        gnome-desktop-testing.
+    </para>
+
+    <para>
+        For information on setting up and running ptests, see the
+        "<ulink url='&YOCTO_DOCS_DEV_URL;#testing-packages-with-ptest'>Testing Packages With ptest</ulink>"
+        section in the Yocto Project Development Manual.
+    </para>
+</section>
+
 <section id='ref-classes-python-dir'>
     <title><filename>python-dir.bbclass</filename></title>