diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 33e7ca0..9593a76 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,7 @@
 - TODO: document VSCode extension development practices
 - TODO: document Helix Kerolox language setup
 - TODO: document licensing and attribution guidelines
+- TODO: write testing docs
 
 # Contributing to the Tree-sitter Grammar