Currently when the test plan does not include a filter in a given stage, it is considered OK, but it should only be so if the solution has no filter, otherwise it is masking potential bugs.

e.g: if the generated plan is

IXSCAN
    FILTER: alwaysFalse: true
    PATTERN: {a: 1}

And the expected plan is

IXSCAN
    PATTERN: {a: 1} 

The test would succeed but the results would be completely different