My test is failing and it's unclear why/how.

def get_moves(player):
    """Based on the tuple of the player's postition, return the list
    of accetable moves

    >>> GAME_DIMENSIONS = (2,2)                                                                           
    >>> get_moves((0,2))                                                                                  
    ['RIGHT', 'UP', 'DOWN']  

    """
    x, y = player
    moves = ['LEFT', 'RIGHT', 'UP', 'DOWN']
    if x == 0:
        moves.remove('LEFT')
    if x == GAME_DIMENSIONS[0] - 1:
        moves.remove('RIGHT')
    if y == 0:
        moves.remove('UP')
    if y == GAME_DIMENSIONS[1] - 1:
        moves.remove('DOWN')
    return moves