dev-manual: fix testimage usage instructions

The proper way to inherit the testimage class is now

IMAGE_CLASSES += "testimage"

so change lines with 'INHERIT += "testimage"' to match. This makes the
dev-manual consistent with the migration guide, which already specifies
that the old way causes an error.

(From yocto-docs rev: 40d82ec5f55c2353ef6f052e8460a6003fd903f4)

Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/documentation/dev-manual/runtime-testing.rst b/documentation/dev-manual/runtime-testing.rst
index a5d8502fbb..177f781b62 100644
--- a/documentation/dev-manual/runtime-testing.rst
+++ b/documentation/dev-manual/runtime-testing.rst
@@ -229,7 +229,7 @@ The final thing you need to do when setting :term:`TEST_TARGET` to
    statements in your ``local.conf`` file::
 
       IMAGE_FSTYPES += "tar.gz"
-      INHERIT += "testimage"
+      IMAGE_CLASSES += "testimage"
       TEST_TARGET = "SystemdbootTarget"
       TEST_TARGET_IP = "192.168.2.3"
 
@@ -335,7 +335,7 @@ You can start the tests automatically or manually:
    inherit the :ref:`ref-classes-testimage*` class by editing your
    ``local.conf`` file::
 
-      INHERIT += "testimage"
+      IMAGE_CLASSES += "testimage"
 
    Next, use BitBake to run the tests::