test (someone's) patience

Translations
испытывать (чьё-то) терпение
The constant delays were beginning to test her patience.
Постоянные задержки начинали испытывать её терпение.
Definitions
To challenge or provoke someone's ability to remain calm and tolerant in a difficult or frustrating situation.
Words
patience

noun
терпение
test

verb
тестировать