diff --git a/etc/test_delta_debug.sh b/etc/test_delta_debug.sh
index b391cac77c2..14e74095699 100755
--- a/etc/test_delta_debug.sh
+++ b/etc/test_delta_debug.sh
@@ -5,7 +5,8 @@
 # variable names such as $(false), unused variables, etc.
 set -ue -o pipefail
 
-cd "$(dirname $(readlink -f $0))/../flow"
+cd "$(dirname $(readlink -f $0))"
+cd ../../../flow
 
 testname=uart