diff --git a/poky/meta-poky/conf/local.conf.sample b/poky/meta-poky/conf/local.conf.sample
index d28bf58..cf96598 100644
--- a/poky/meta-poky/conf/local.conf.sample
+++ b/poky/meta-poky/conf/local.conf.sample
@@ -157,10 +157,12 @@
 # Runtime testing of images
 #
 # The build system can test booting virtual machine images under qemu (an emulator)
-# after any root filesystems are created and run tests against those images. To
-# enable this uncomment this line. See classes/testimage(-auto).bbclass for
-# further details.
-#TEST_IMAGE = "1"
+# after any root filesystems are created and run tests against those images. It can also
+# run tests against any SDK that are built. To enable this uncomment these lines.
+# See classes/test{image,sdk}.bbclass for further details.
+#IMAGE_CLASSES += "testimage testsdk"
+#TESTIMAGE_AUTO_qemuall = "1"
+
 #
 # Interactive shell configuration
 #