diff --git a/test/core/end2end/README b/test/core/end2end/README
index 59daec45d008b7e90cc62b8a8db86fb93da0b39a..a18172a7a1db6528c388cb8d11b127f065991008 100644
--- a/test/core/end2end/README
+++ b/test/core/end2end/README
@@ -3,5 +3,5 @@ forms a complete end-to-end test.
 
 To add a new test or fixture:
 - add the code to the relevant directory
-- update gen_build_json.py to reflect the change
+- update gen_build_yaml.py to reflect the change
 - regenerate projects