diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0922f0e..f93913a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -2,5 +2,6 @@
 - Create a new git branch
 - Make changes
 - Run tests: `make test`
+- Run tests agains all supported PostreSQL versions: `make test-all` (optional)
 - If you change frontend code (js/css) make sure to rebuild assets: `make assets`
-- Open a PR
\ No newline at end of file
+- Open a new pull request
\ No newline at end of file