diff --git a/packages/taiko-client/integration_test/README.md b/packages/taiko-client/integration_test/README.md
index 056dbacf88..2e3d99cb13 100644
--- a/packages/taiko-client/integration_test/README.md
+++ b/packages/taiko-client/integration_test/README.md
@@ -1,4 +1,8 @@
 # How to debug test cases?
+- set up config
+```
+export L2_NODE=l2_geth
+```
 
 - start docker compose