diff --git a/scripts/ci.sh b/scripts/ci.sh
index 30a5215..b93b645 100755
--- a/scripts/ci.sh
+++ b/scripts/ci.sh
@@ -7,3 +7,4 @@ nix develop .#ci --command prettier --check .
 nix fmt -- --ci
 nix develop .#ci --command lua-language-server --check lua --configpath "$(pwd)/.luarc.json" --checklevel=Warning
 nix develop .#ci --command vimdoc-language-server check doc/
+nix develop .#ci --command busted