The game started in baking sun and on a pitch that had flattened out to leave little assistance for the bowlers.
By lunch all-rounder James Faulkner had taken two of the nine wickets needed to sign off their preparations with a win, with the hosts 320 behind on 136 for three.
Faulkner aside, the likes of Jackson Bird and Ryan Harris will not have done their hopes of breaking into the Test side much good as they failed to break through.
With Worcestershire having no chance of reaching their target for victory, it was up to the visiting attack to force the issue but they were unable to do so in the first 19 overs of the day.
Bird, the pick of the bowlers in the first innings, sent down four tidy but unexciting overs, backed initially by Ashton Agar's left-arm spin.
Matt Pardoe, 34 not out overnight, worked the latter for a couple of boundaries, while Moeen Ali greeted Harris' introduction by slashing him for four.
Pardoe reached his half-century by cutting Harris for his 10th boundary but he was gone for 57 when he nicked Faulkner to Michael Clarke at first slip.
Moeen, who needed to score 82 to become the first batsman to reach 1,000 first-class runs this summer, managed 35 in a sedate 94-ball stay before he was pinned leg before by a Faulkner yorker.
- Sports & Recreation