Instruments with same VISA name

I have a setup with many instruments being controlled from a central computer. The program that I'm writing interfaces with a coherent OBIS laser through the VISA port ASRL8::INSTR, which works just fine. However, I need to add an Arduino to the setup, and the Arduino also has the name ASRL8::INSTR. I don't need to use VISA to control the Arduino, but having it present in the system interferes with my ability to control the laser. 
I thought that VISA names were supposed to be unique. How can I resolve this conflict?