How to test pdflatex-dev

Phelype Oleinik phe.h.o1 at
Mon Mar 8 16:24:39 CET 2021

On Mon, Mar 8, 2021 at 12:17 PM Xu Wang <xuwang762 at> wrote:
> Dear list,
> What are different ways to test pdflatex-dev? I read the following news:
> I have one system with TL2020 and one system with TL2021 pre-test. Can
> I test with each of them? Is there anything I need to do on them other
> than just tlmgr update? What is the expected output from pdflatex-dev

Hi Xu,

You just have to run on the command line:


instead of 'pdflatex'.  If you don't have it installed you need the
'latex-bin-dev' package (tlmgr install latex-bin-dev).  If you have it,
then LaTeX will tell you its version ID:

    LaTeX2e <2021-05-01> pre-release-1 (develop 2021-3-5 branch)

rather than the usual (current main release)

    LaTeX2e <2020-10-01> patch level 4

If you set paths appropriately, you should be able to run either
'pdflatex' or 'pdflatex-dev' with either TeX Live, but currently both
have the same version of LaTeX, so you shouldn't see any difference
between TL'20 and TL'21 in LaTeX for now.

Thanks for testing!


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