Why would SHR not send Harvick instead of Busch? That seems odd to me.
Testing at Homestead
MIAMI - In preparation for Homestead-Miami Speedway's Ford EcoBoost 400 championship race on November 19, some of NASCAR's biggest stars in the Monster Energy NASCAR Cup Series will be taking the track for a NASCAR test session. The testing will take place Tuesday, October 24 on Homestead-Miami Speedway's 1.5-mile oval, where one car from most of the major Monster Energy Series teams are slated to participate.
The testing session will run from 12 p.m. to 7 p.m., weather permitting. Fans who would like to witness this preview of the Ford EcoBoost 400, the crowning race of the Monster Energy Series Playoffs, are invited to watch the testing at the track. Those in attendance will have the opportunity to get an up-close look at the cars from the infield Pit Road Cabanas or enjoy a panoramic view of the track from the grandstands or the fourth floor Speedway Club.
Fans attending may park their vehicles in the parking lot on S.W. 336th Street and S.W. 137th Avenue. Entry to the facility is through Gate 4 where a tram will take fans to the infield. The tram will be available from 11:30 a.m. to 7:30 p.m.
Drivers who are scheduled to participate in the testing session: #78-Martin Truex Jr. (Furniture Row Racing), #42-Kyle Larson (Chip Ganassi Racing), #11-Denny Hamlin (Joe Gibbs Racing), #48-Jimmie Johnson (Hendrick Motorsports), #2-Brad Keselowski (Team Penske), #6-Trevor Bayne (Roush Fenway Racing), #41-Kurt Busch (Stewart-Haas Racing), #21-Ryan Blaney (Wood Brothers Racing), Alex Bowman (Chevrolet R&D), Landon Cassill (Ford R&D), Drew Herring (Toyota R&D)
http://www.espn.com/jayski/cup/2017/story/_/id/21043639/testing-homestead