Notts County extended their unbeaten run in the Vanarama National League to eight games but they were held to a goalless draw by Dover at Meadow Lane.
The hosts came closest to breaking the deadlock in a quiet first half when Enzio Boldewijn and Kyle Wootton were denied by a fine double save from Lee Worgan.
Shadrach Ogie curled an effort wide for Dover at the start of the second half, before Worgan denied Wes Thomas when one-on-one with the Magpies forward.
Dover midfielder Oscar Gobern sent a volley narrowly wide while Kristian Dennis headed off target at the other end for County as the game entered its last 20 minutes.
Notts pushed for a winner in the closing stages and, in the 10th minute of stoppage time, Boldewijn struck a post with a free-kick.