Should flag

Border on a rounded card

A 3px left border on 12px corners.

Pseudo bar on a rounded card

A 5px ::before bar on 12px corners.

Inset shadow on a rounded card

A 6px inset left shadow on 12px corners.

Inset right shadow rounded away

An 8px inset right shadow; the left corners are round.

Radius from a custom property

A 7px left border; the custom property rounds the right corners.

Pseudo bar rounded by another class

A 9px ::after bar; the radius lives on the shell class.

Should pass

Border on a square box

A 4px left border with no radius.

Pseudo bar on a square box

A 4px ::before bar with no radius.

Inset shadow on a square box

A 4px inset left shadow with no radius.

Squared off away from the stripe

The far corners are set back to 0 after the shorthand.

Radius in em on small text

0.3em of 12px is under 4px.

Custom property rounds under the stripe

Only the corners along the border are round.

Pseudo bar rounded under the stripe

Only the corners along the bar are round.