diff --git a/swaks-tests/run-tests.sh b/swaks-tests/run-tests.sh
index e747dde..0784a11 100755
--- a/swaks-tests/run-tests.sh
+++ b/swaks-tests/run-tests.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # run-tests.sh
 # description: Generate test emails for Inbucket