diff --git a/README.md b/README.md
index a95d9e6..7bb6fea 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ The following screenshots are generated with `matplotlib`
 
 - Null data may be generated in some cases
 
+- Add (unit) tests
+
 ## License
 
 N/A