A system and method for determining whether a user interface is properly injected on an electronic device are provided. Web site data for a web site is accessed, additional code are injected into the accessed web site data and the web site based on the injected additional code is provided for display. An actual image of a user interface corresponding to the displayed web site is obtained. An expected image of the user interface in which the additional code is properly injected into the web site is received. The expected image of the user interface with the actual image of the user interface are compared. In a case where the expected image of the user interface and the actual image of the user interface do not match, an error message is generated and notification of the error message is provided to the electronic device.