Adapt test/README

* test/README: Speak about continous integration tests on hydra
and emba.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/README b/test/README
index 2b705f313df..cd6905d7ebf 100644
--- a/test/README
+++ b/test/README
@@ -89,6 +89,16 @@ value in order to overwrite the default value:
   env REMOTE_TEMPORARY_FILE_DIRECTORY=/ssh:host:/tmp make ...
 
 
+There are also continuous integration tests on
+<https://hydra.nixos.org/jobset/gnu/emacs-trunk> (see
+admin/notes/hydra) and <https://emba.gnu.org/emacs/emacs>.  Both
+environments provide an environment variable, which could be used to
+determine, whether the tests run in one of these test environments.
+
+$EMACS_HYDRA_CI indicates the hydra environment, and $EMACS_EMBA_CI
+indicates the emba environment, respectively.
+
+
 (Also, see etc/compilation.txt for compilation mode font lock tests.)