diff --git a/.wp-env.json b/.wp-env.json
index aa8dfaf3c0c4a..7e88e7b3ccd7d 100644
--- a/.wp-env.json
+++ b/.wp-env.json
@@ -1,5 +1,5 @@
 {
-	"core": "WordPress/WordPress",
+	"core": "WordPress/WordPress#6.1-branch",
 	"plugins": [ "." ],
 	"themes": [ "./test/emptytheme" ],
 	"env": {