diff --git a/poky/documentation/test-manual/reproducible-builds.rst b/poky/documentation/test-manual/reproducible-builds.rst
index c66c82f..68fdf54 100644
--- a/poky/documentation/test-manual/reproducible-builds.rst
+++ b/poky/documentation/test-manual/reproducible-builds.rst
@@ -70,7 +70,7 @@
 
 .. note::
 
-   Because of an open bug in GCC, using ``DISTRO_FEATURES_append = " lto"`` or
+   Because of an open bug in GCC, using ``DISTRO_FEATURES:append = " lto"`` or
    adding ``-flto`` (Link Time Optimization) to ``CFLAGS`` makes the resulting
    binary non-reproducible, in that it depends on the full absolute build path
    to ``recipe-sysroot-native``, so installing the Yocto Project in a different
diff --git a/poky/documentation/test-manual/understand-autobuilder.rst b/poky/documentation/test-manual/understand-autobuilder.rst
index c158d9c..b6809ce 100644
--- a/poky/documentation/test-manual/understand-autobuilder.rst
+++ b/poky/documentation/test-manual/understand-autobuilder.rst
@@ -27,7 +27,7 @@
          "TEMPLATE" : "arch-qemu",
          "step1" : {
                "extravars" : [
-                     "IMAGE_FSTYPES_append = ' wic wic.bmap'"
+                     "IMAGE_FSTYPES:append = ' wic wic.bmap'"
                     ]
         }
    },
diff --git a/poky/documentation/test-manual/yocto-project-compatible.rst b/poky/documentation/test-manual/yocto-project-compatible.rst
index a789746..96c12ac 100644
--- a/poky/documentation/test-manual/yocto-project-compatible.rst
+++ b/poky/documentation/test-manual/yocto-project-compatible.rst
@@ -115,6 +115,11 @@
    user changes a configuration setting to activate the layer, by selecting
    a :term:`MACHINE`, a :term:`DISTRO` or a :term:`DISTRO_FEATURES` setting.
 
+-  Layers should be documenting where they don’t support normal "core"
+   functionality such as where debug symbols are disabled or missing, where
+   development headers and on-target library usage may not work or where
+   functionality like the SDK/eSDK would not be expected to work.
+
 The project does test the compatibility status of the core project layers on
 its :doc:`Autobuilder </test-manual/understand-autobuilder>`.