Seems like the CI test timed out because "A worker was found in a dead state":

[31m[00:42:12] [E] [testing-thread_0] [artemis] [1abc0225-3af5-4082-bbf1-e08b67d330c3] Last 30 lines of Ansible stdout:
---v---v---v---v---v---
TASK [run_bats_tests : toolbx | define local environment] **********************
ok: [sut] => {
    "ansible_facts": {
        "local_environment": {
            "TEST_ENV": {
                "TMPDIR": "/var/tmp",
                "XDG_RUNTIME_DIR": "/run/user/1001"
            },
            "TEST_NAME": "toolbx",
            "TEST_PACKAGE": "toolbox"
        }
    },
    "changed": false
}

TASK [run_bats_tests : toolbx | setup/teardown helper | see if exists] *********
ok: [sut -> localhost] => {
    "changed": false,
    "stat": {
        "exists": false
    }
}

TASK [run_bats_tests : toolbx | setup/teardown helper | install] ***************
skipping: [sut] => {
    "changed": false,
    "skip_reason": "Conditional result was False"
}

TASK [run_bats_tests : toolbx | run test] **************************************
---^---^---^---^---^---?[0m
?[31m[00:42:12] [E] [testing-thread_0] [artemis] [1abc0225-3af5-4082-bbf1-e08b67d330c3] Last 30 lines of Ansible stderr:
---v---v---v---v---v---
ERROR! A worker was found in a dead state
---^---^---^---^---^---?[0m