Should I declare the income received from a restaurant, which made 3 payments to my account, as self-employed income, even though I wasn't registered as an employee?

I worked for less than two months, only being called for a few shifts. When I requested a T4, the restaurant informed me that I was not registered as an employee and would not receive the document. The total amount I received was $376 paid directly into my account by the restaurant. Should I declare this income as self-employed?