diff --git a/apps/emqx_durable_storage/IMPLEMENTATION.md b/apps/emqx_durable_storage/IMPLEMENTATION.md
index 5af003cac..9c0c5928c 100644
--- a/apps/emqx_durable_storage/IMPLEMENTATION.md
+++ b/apps/emqx_durable_storage/IMPLEMENTATION.md
@@ -10,7 +10,7 @@ This is because shared subscription logic needs to be aware of it to some extend
 # Modus operandi
 
 1. Create a draft implementation of a milestone
-2. Performance
+2. Test performance
 3. Test consistency
 4. Goto 1