for good measure

idiomatic

(idiomatic) In excess of the minimum required; Added as an extra

Japanese Meaning

必要最低限を超えて、さらに追加として提供すること / 余分に、追加で加える様子

I added an extra cup of broth for good measure, just in case the stew was too thick.

シチューが濃くなりすぎるといけないので、念のためブイヨンをもう一杯加えた。

Sense（1）

(idiomatic) In excess of the minimum required; Added as an extra

He tossed in a couple of extra shirts for good measure and closed the suitcase.