It will depend upon your insurance companies guidelines and the terms of your insurance if your insurance would cover you in an uninsured vehicle. If you were aware that the vehicle does not have insurance on it when you drove it may be a factor when the insurance company looks at a claim.

As a motorist you need to verify that any car you drive is insured and not rely upon your own insurance in case there is an accident or collision. The coverage for the vehicle typically follows the car and not the driver, so your policy probably doesn't apply. In many states if you are stopped or in an accident you will need to show proof that the vehicle has insurance, if it does not then the registration of the car may be suspended by the state, so you may get ticketed for driving a vehicle that is not insured and without valid registration.