Fix broken instance announcements test after the currently_valid scope was fixed.
Fix broken instance announcements test after the currently_valid scope was fixed.

BenMQ/coursemology2,harryggg/coursemology2,xzhflying/coursemology2,Coursemology/coursemology2,harryggg/coursemology2,xzhflying/coursemology2,BenMQ/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,harryggg/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,xzhflying/coursemology2,Coursemology/coursemology2,BenMQ/coursemology2