According to ROS humble tutorials. I ran:

mkdir -p ~/ros2_ws/src

cd ~/ros2_ws

git clone https://github.com/ros2/examples src/examples -b humble

colcon build --symlink-install

colcon build

colcon test-result --all --verbose and here is what I get:

...... build/examplesrclcppwaitset/testresults/examplesrclcppwaitset/lintcmake.xunit.xml: 1 test, 0 errors, 0 failures, 0 skipped build/examplesrclcppwaitset/testresults/examplesrclcppwaitset/uncrustify.xunit.xml: 15 tests, 0 errors, 0 failures, 0 skipped build/examplesrclcppwaitset/testresults/examplesrclcppwaitset/xmllint.xunit.xml: 1 test, 0 errors, 0 failures, 0 skipped build/examplesrclpyexecutors/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyexecutors.executors.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsandargs'

build/examplesrclpyguardconditions/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyguardconditions.guardconditions.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsand_args'

build/examplesrclpyminimalactionclient/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyminimalactionclient.actions.minimalactionclient.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsandargs'

build/examplesrclpyminimalactionserver/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyminimalactionserver.actions.minimalactionserver.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsandargs'

build/examplesrclpyminimalclient/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyminimalclient.services.minimalclient.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsand_args'

build/examplesrclpyminimalpublisher/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyminimalpublisher.topics.minimalpublisher.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsand_args'

build/examplesrclpyminimalservice/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyminimalservice.services.minimalservice.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsand_args'

build/examplesrclpyminimalsubscriber/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpyminimalsubscriber.topics.minimalsubscriber.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsand_args'

build/examplesrclpypointcloudpublisher/pytest.xml: 3 tests, 0 errors, 1 failure, 0 skipped - examplesrclpypointcloudpublisher.topics.pointcloudpublisher.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsand_args'

build/launchtestingexamples/pytest.xml: 9 tests, 0 errors, 1 failure, 0 skipped - launchtestingexamples.test.testflake8 testflake8 <<< failure message AttributeError: 'Application' object has no attribute 'parsepreliminaryoptionsandargs'