Here's the link from which I borrowed a fellow 986 owners tip.
https://www.renntech.org/forums/topic/49155-secondary-air-test-readiness-monitor-incomplete/?page=3
On all my cold starts I let the engine idle completely thru the first 2 min of the test. Drove multiple miles and never set. The only difference between him and I is I just reved it to 2800rpms while sitting in the garage.