<!-- Ouch, sorry you’ve run into a bug. Thank for taking the time to report it! Please fill in as much of the template below as you’re able. --> ### Subject of the issue Undesired errors at console during tests run: [Vue warn]: Error in render: "TypeError: Cannot read property 'template' of null" ### Steps to reproduce Was faced with above issue and found place at code which rises it: function isComponentOptions(c) { return typeof c === 'object' && (c.template || c.render) } In fact typeof null in JS also returns 'object' - have you expected this guys?))) ### Expected behaviour Suggest to change this place in way: return !!c && typeof c === 'object' && (c.template || c.render) ### Actual behaviour Tons of errors at console like: [Vue warn]: Error in render: "TypeError: Cannot read property 'template' of null" ### Possible Solution Haven't found workaround yet.