England bowler Steven Finn raised concerns about the join between the drop-in pitch and the outfield at the northern end of Eden Park after the second day of the final test against New Zealand.
Head groundsman Mark Perham rushed on during the final session when Trent Boult was bowling.
Boult waited while Perham prised back a flap of pitch with a spade and scooped what looked to be sand or dirt underneath to smooth out a bump.
Finn says: "We knew there would be a bit of a ridge there and unevenness. We also found that in the one-dayer and Twenty20.
"It's nothing we didn't anticipate but that's up to the groundsman [to fix], I suppose.