A review of the testing speeds from Thursday and Friday at Las Vegas Motor Speedway.
THURSDAY: MORNING SESSION
| Position | Number | Driver | Speed (mph) |
| 1. | Chevrolet Wheel Force | Ross Chastain | 183.163 |
| 2. | 48 | Jimmie Johnson | 178.885 |
| 3. | 47 | Ryan Preece | 177.678 |
| 4. | 3 | Austin Dillon | 177.556 |
| 5. | 43 | Bubba Wallace | 177.381 |
| 6. | 14 | Clint Bowyer | 177.107 |
| 7. | 2 | Brad Keselowski | 176.263 |
| 8. | 95 | Matt DiBenedetto | 176.200 |
| 9. | 13 | Ty Dillon | 176.131 |
| 10. | 1 | Kurt Busch | 176.051 |
| 11. | 21 | Paul Menard | 175.959 |
| 12. | Toyota Wheel Force | Drew Herring | 175.810 |
| 13. | 6 | Ryan Newman | 175.598 |
| 14. | 18 | Kyle Busch | 175.524 |
| 15. | 00 | Landon Cassill | 172.999 |
| 16. | 51 | Cody Ware | 172.557 |
| 17. | Ford Wheel Force | David Ragan | 172.381 |
RELATED: See pics from Thursday
THURSDAY: AFTERNOON SESSION
| Position | Number | Driver | Speed (mph) |
| 1. | 43 | Bubba Wallace | 178.253 |
| 2. | 3 | Austin Dillon | 178.024 |
| 3. | 1 | Kurt Busch | 177.795 |
| 4. | 18 | Kyle Busch | 177.784 |
| 5. | 2 | Brad Keselowski | 177.678 |
| 6. | Toyota Wheel Force | Drew Herring | 177.299 |
| 7. | 14 | Clint Bowyer | 177.101 |
| 8. | 21 | Paul Menard | 177.096 |
| 9. | 47 | Ryan Preece | 177.055 |
| 10. | 13 | Ty Dillon | 177.032 |
| 11. | 6 | Ryan Newman | 176.927 |
| 12. | 48 | Jimmie Johnson | 176.540 |
| 13. | 95 | Matt DiBenedetto | 176.448 |
| 14. | Chevrolet Wheel Force | Ross Chastain | 175.342 |
| 15. | 51 | Cody Ware | 175.330 |
| 16. | 00 | Landon Cassill | 173.907 |
| 17. | Ford Wheel Force | David Ragan | 173.171 |
FRIDAY SESSION
| Position | Number | Driver | Speed (mph) |
| 1. | 2 | Brad Keselowski | 178.2436 |
| 2. | 3 | Austin Dillon | 177.983 |
| 3. | 14 | Clint Bowyer | 177.948 |
| 4. | 48 | Jimmie Johnson | 177.948 |
| 5. | 6 | Ryan Newman | 177.895 |
| 6. | 21 | Paul Menard | 177.801 |
| 7. | 1 | Kurt Busch | 177.766 |
| 8. | 18 | Kyle Busch | 177.334 |
| 9. | 47 | Ryan Preece | 177.258 |
| 10. | 43 | Bubba Wallace | 177.235 |
| 11. | 95 | Matt DiBenedetto | 177.090 |
| 12. | Toyota Wheel Force | Drew Herring | 176.488 |
| 13. | 13 | Ty Dillon | 176.419 |
| 14. | 00 | Landon Cassill | 175.256 |
| 15. | Chevrolet Wheel Force | Ross Chastain | 173.700 |
| 16. | Ford Wheel Force | David Ragan | 171.472 |