Writing custom hardware tests

Hi all,

I am trying to write some automated hardware tests for my device. I'm
following the instructions in
https://docs.yoctoproject.org/5.0.12/test-manual/runtime-testing.html#performing-automated-runtime-testing

In local.conf I have the following:

DISTRO_FEATURES:append = " ptest"
EXTRA_IMAGE_FEATURES += "ptest-pkgs"
TEST_SERIALCONTROL_CMD = "microcom -s 115200 -p /dev/ttyUSB0"
IMAGE_CLASSES += "testimage"
#INHERIT += "testexport"
TEST_TARGET = "MyTarget"

In my layer I have a custom target
meta-my-layer/lib/oeqa/controllers/mytarget.py  (copied from
meta-yocto-bsp/lib/oeqa/controllers/grubtarget.py and modified for MyTarget
class)

When I run bitbake -c testimage my-image I get this error

     0182:    @staticmethod
     0183:    def _loadControllerFromModule(target, modulename):
Exception: AttributeError: Unable to load MyTarget from available modules:
['oeqa.controllers.controllerimage', 'oeqa.controllers.testtargetloader',
'oeqa.controllers.fvp']

If I add  addpylib ${LAYERDIR}/lib oeqa to my layer.conf (like other layers
have) I get this new error

File:
'/workspaces/my-distro/sources/poky/meta/classes-recipe/testimage.bbclass',
lineno: 181, function: testimage_main
     0177:    import logging
     0178:    import shutil
     0179:
     0180:    from bb.utils import export_proxies
 *** 0181:    from oeqa.runtime.context import OERuntimeTestContext
     0182:    from oeqa.runtime.context import OERuntimeTestContextExecutor
     0183:    from oeqa.core.target.qemu import supported_fstypes
     0184:    from oeqa.core.utils.test import getSuiteCases
     0185:    from oeqa.utils import make_logger_bitbake_compatible
Exception: ModuleNotFoundError: No module named 'oeqa.runtime.context'

Any help is appreciated.
Rusty Howell