目くじらを立てる

目くじらを立てる (めくじらをたてる) means to make a fuss over a small fault.

Kana
めくじらをたてる
Meaning
to make a fuss over a small fault
Japanese Example
その程度のミスに目くじらを立てる必要はない。
Translation
There is no need to make a fuss over such a small mistake.