diff --git a/docs/highlighters.md b/docs/highlighters.md
index fa8e8e5..00738ba 100644
--- a/docs/highlighters.md
+++ b/docs/highlighters.md
@@ -81,3 +81,5 @@ To create your own `myhighlighter` highlighter:
 * Activate your highlighter in `~/.zshrc`:
 
         ZSH_HIGHLIGHT_HIGHLIGHTERS+=(myhighlighter)
+
+* [Write tests](../tests/README.md).