diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index ee583fe9ba..7c2b4fb278 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -3069,6 +3069,9 @@ using the following::
 
    $ bitbake -c testsdk image
 
+The list of test modules that are run can be controlled with the
+:term:`TESTSDK_SUITES` variable.
+
 .. note::
 
    Best practices include using :term:`IMAGE_CLASSES` rather than
diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 1a4e8a2548..a5d43966cd 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -10165,6 +10165,12 @@ system and gives an overview of their function and contents.
       :term:`TESTIMAGE_FAILED_QA_ARTIFACTS`  lists space-separated paths on the
       target to retrieve onto the host.
 
+   :term:`TESTSDK_SUITES`
+      When using the :ref:`ref-classes-testsdk` class, the
+      :term:`TESTSDK_SUITES` variable can be used to control the list of test
+      modules to run. The default value for this variable is an empty string
+      and all test modules that can be found are run.
+
    :term:`THISDIR`
       The directory in which the file BitBake is currently parsing is
       located. Do not manually set this variable.