Correct Kokoro scripts
diff --git a/tools/internal_ci/linux/grpc_master_sanitizers.sh b/tools/internal_ci/linux/grpc_master_sanitizers.sh
index 2cd0efe..d22387f 100755
--- a/tools/internal_ci/linux/grpc_master_sanitizers.sh
+++ b/tools/internal_ci/linux/grpc_master_sanitizers.sh
@@ -37,4 +37,4 @@
 
 # download docker images from dockerhub
 export DOCKERHUB_ORGANIZATION=grpctesting
-tools/run_tests/run_tests_matrix.sh -f sanitizers linux
+tools/run_tests/run_tests_matrix.py -f sanitizers linux