diff --git a/run_tests.sh b/run_tests.sh
index b409db83..2b6a9523 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 OPT_CREATE_REDIS=yes # create the redis test environment
 OPT_CREATE_PGSQL=yes # create the PostgreSQL test environment