TASK [Test inventory without filter] fails "ansible-test-inventory' in hostvars"

[displague]

TASK [Test inventory without filter] fails "ansible-test-inventory' in hostvars":

TASK [assert] ******************************************************************
fatal: [localhost]: FAILED! => {
    "assertion": "'ansible-test-inventory' in hostvars",
    "changed": false,
    "evaluated_to": false,
    "msg": "Assertion failed"
}

I think this is the second test, based on the test failure not including a name:

Originally posted by @displague in #158 (comment)