As far as I know, most if not all Canadian voting machines are certified to US standards, in the absence of any Canadian ones. This testing is done by three secretive US testing labs.
In a good Computer World story E-vote at Risk, they report
One of the most critical aspects of the voting system development process is the testing and certification of hardware and software to ensure that they meet voluntary federal voting standards for security and reliability. Three vendors act as so-called independent testing authorities (ITA). However, IT experts are highly critical of the testing process because of its secrecy.