Scoreboard Selector not working

When the command clear @p[score_min_break=1] diamond_pickaxe is run in a command block, the player's inventory is not cleared of a diamond pickaxe. I have the objective of "break", which is stat.useItem.minecraft.diamond_pickaxe, and when I raise my score to 1 or more, my pickaxe is not cleared. I am not sure as to whether I am just using this incorrectly, or if something is not working. Also, when the command block with that command is powered, the "output" line is the same as the "input".