add different current loads to test noise on DC-DC converter
Well for anyone in the same situation: @Whit3rd (thanks for your help) was right about adding a resistor between Vout and GND. The output voltage (5V) determined the R value. With the Radj at that value it output roughly 5V so the tests I ran was at 10mA, 100mA, 200mA, and 450mA so I divided 5V by each of those to find the R value of the shunt resistor needed and it worked as expected after that.

The measurement was for noise so I followed the guide at https://training.ti.com/sites/default/files/docs/measuring_output_noise.pdf and attached my leads to both sides of the output cap for a more accurate reading.