diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index 7a28176ce0..1d4e34f91e 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -8656,9 +8656,19 @@
                 <ulink url='&YOCTO_DOCS_REF_URL;#var-BBPATH'><filename>BBPATH</filename></ulink>
                 is extended in the layer's
                 <filename>layer.conf</filename> file as normal).
-                Just remember that filenames need to map directly to test
-                (module) names and that you do not use module names that
-                collide with existing core tests.
+                Just remember the following:
+                <itemizedlist>
+                    <listitem><para>Filenames need to map directly to test
+                        (module) names.
+                        </para></listitem>
+                    <listitem><para>Do not use module names that
+                        collide with existing core tests.
+                        </para></listitem>
+                    <listitem><para>Minimally, an empty
+                        <filename>__init__.py</filename> file must exist
+                        in the runtime directory.
+                        </para></listitem>
+                </itemizedlist>
             </para>
 
             <para>