Rehearsal mark tweak

[liang seng]

Hi, I have a question regarding the \mark command. Here is the file:
\version "2.7.18"
{
\override Score.RehearsalMark #'padding = #2
\mark \markup { \column { Allegro  \line { \small TUTTI } } } R1 }

As you can see, the Allegro and TUTTI marking are too close to each other. 
How can I lengthen the distance between the Allegro marking and the TUTTI 
marking without cheating? By that I mean adding a word after \line and 
changing its colour to white, so there will be three lines but only two 
visible.

test.pdf
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