The two Sydney nurses who threatened to kill Israeli patients in a video that went viral last year pleaded not guilty in a court hearing on Monday.

Sarah Abu Lebdeh, 27, and Ahmad Rashad Nadir, 28, nurses at Bankstown Hospital, told Israeli influencer Maz Veifer last February that they had harmed Israeli patients and would continue to harm them in the future.

The video sparked international outrage, and their nursing licenses were suspended for two years.

The trial is set for August 31.