* CONTRIBUTE: Encourage adding tests.

[gnu-emacs] / CONTRIBUTE

diff --git a/CONTRIBUTE b/CONTRIBUTE
index 0ca5d0d56dbd905b5fae9f745d6afd3b743425bf..2aae251ce427c0854f142024f8832431ddb60ab4 100644 (file)
--- a/CONTRIBUTE
+++ b/CONTRIBUTE
@@ -248,7 +248,9 @@ for documentation errors before submitting a patch.
 ** Test your changes.
 
 Please test your changes before committing them or sending them to the
-list.
+list.  If possible, add a new test along with any bug fix or new
+functionality you commit (of course, some changes cannot be easily
+tested).
 
 Emacs uses ERT, Emacs Lisp Regression Testing, for testing.  See (info
 "(ert)") or https://www.gnu.org/software/emacs/manual/html_node/ert/