Add test to expose #2965
Add test to expose #2965

Stackdriver/stackdriver-prometheus,JavierZunzunegui/prometheus,Gouthamve/prometheus,Colstuwjx/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,amorken/prometheus,kangwoo/prometheus,alileza/prometheus,prometheus/prometheus,Conorbro/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,Colstuwjx/prometheus,JavierZunzunegui/prometheus,Colstuwjx/prometheus,yanghongkjxy/prometheus,prometheus/prometheus,alileza/prometheus,JavierZunzunegui/prometheus,Colstuwjx/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,alileza/prometheus,yanghongkjxy/prometheus,Gouthamve/prometheus,alileza/prometheus,alileza/prometheus,brancz/prometheus,keegancsmith/prometheus,yanghongkjxy/prometheus,prometheus/prometheus,Stackdriver/stackdriver-prometheus,amorken/prometheus,Conorbro/prometheus,Stackdriver/stackdriver-prometheus,amorken/prometheus,AlekSi/prometheus,kangwoo/prometheus,prometheus/prometheus,amorken/prometheus,kangwoo/prometheus,JavierZunzunegui/prometheus,Conorbro/prometheus,yanghongkjxy/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,AlekSi/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,brancz/prometheus,AlekSi/prometheus,AlekSi/prometheus,Conorbro/prometheus,GoogleCloudPlatform/prometheus,brancz/prometheus,Gouthamve/prometheus,Stackdriver/stackdriver-prometheus,brancz/prometheus