PR link misspelled when pushing tests branch

I just encountered this:

$ git push -u origin tests
Enumerating objects: 9, done.
Counting objects: 100% (9/9), done.    Delta compression using up to 4 threads
Compressing objects: 100% (6/6), done.
Writing objects: 100% (6/6), 1.12 KiB | 19.00 KiB/s, done.
Total 6 (delta 1), reused 0 (delta 0)
remote: Resolving deltas: 100% (1/1), completed with 1 local object.          remote:
remote: Create a pull request for 'tests' on GitHub by visiting:
remote:      https://github.com/niccokunzmann/open-web-calendar/pull/new/test
remote:                                To github.com:niccokunzmann/open-web-calendar                                  * [new branch]      tests -> tests
Branch 'tests' set up to track remote branch 'tests' from 'origin'.

https://github.com/niccokunzmann/open-web-calendar/pull/new/test
should have an s at the end.