diff --git a/.drone.env b/.drone.env
index 2a1238ca59..82fee2dcbb 100644
--- a/.drone.env
+++ b/.drone.env
@@ -1,6 +1,6 @@
 # The test runner source for API tests
-CORE_COMMITID=02efc51a06c2cbd9c587c1126c3524d9e2b6fb95
-CORE_BRANCH=master
+CORE_COMMITID=8f4a529606a5745ff19426a82f30f7f3136c32f7
+CORE_BRANCH=fix-return-types
 
 # The test runner source for UI tests
 WEB_COMMITID=6dae5d82e4c6b3310301005ad6e38c0493b854fa