diff --git a/.kokoro/psm_interop_kokoro_lib.sh b/.kokoro/psm_interop_kokoro_lib.sh
index fe9926ff..1574d2c1 100644
--- a/.kokoro/psm_interop_kokoro_lib.sh
+++ b/.kokoro/psm_interop_kokoro_lib.sh
@@ -208,6 +208,7 @@ psm::dualstack::run_test() {
 # Fallback Test Suite setup.
 #######################################
 psm::fallback::setup() {
+  : # Placeholder for future setup commands
 }
 
 #######################################