"It was a testing day for the bowling group but something we needed," Boult said, acknowledging things will be very different in a few days' time.
"It was hard to try and put into play a game plan going into the first test on a lot bouncier wicket, but the guys were making the most of what was in front of them.
"It's all about grooving yourself and getting ready as best we can."
The makeup of New Zealand's first test side won't become clear for at least another day. But most likely two seamers, one spinner and one batsman will sit it out.
Auckland batsman Colin Munro will get to spend the entire New Zealand tour in the land of his birth.
Munro is in the test squad, replacing luckless Peter Fulton, who has pulled out with a tendon injury in his right knee.
Munro played in the T20s, and is in the ODI squad to follow the tests.
"Peter played yesterday in an effort to determine whether the injury would affect his batting," team physiotherapist Paul Close said.
"By the end of his innings [of 39] the pain was significant and it became clear that the injury would prevent him from playing a full range of shots."
New Zealand will also be hoping Fulton's Canterbury teammate Dean Brownlie is fully over the stomach bug he picked up late last week.
And lest anyone wonder if South Africa are a touch complacent before the two-test series, their busy training schedule leading up to the first test should help dispel that notion.
South Africa have lost a test at home in every one of their past five series, going back to the visit by lowly Bangladesh in 2008-09.
They have been beaten by Australia (in two series), England, India and Sri Lanka since then.
A crumb or two of hope for New Zealand perhaps, as they prepare for a battle in which the odds are heavily against them.