bash is installed in a different directory on non-Linux systems like
FreeBSD. Do not hard-code /bin/bash here so that the tests can run
there, too.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 tests/qemu-iotests/239 | 2 +-
 tests/qemu-iotests/240 | 2 +-
 tests/qemu-iotests/241 | 2 +-
 tests/qemu-iotests/243 | 2 +-
 tests/qemu-iotests/244 | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tests/qemu-iotests/239 b/tests/qemu-iotests/239
index 6f085d573d..b0991ffe59 100755
--- a/tests/qemu-iotests/239
+++ b/tests/qemu-iotests/239
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Test case for dmg
 #
diff --git a/tests/qemu-iotests/240 b/tests/qemu-iotests/240
index 65cc3b39b1..d3e663ed65 100755
--- a/tests/qemu-iotests/240
+++ b/tests/qemu-iotests/240
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Test hot plugging and unplugging with iothreads
 #
diff --git a/tests/qemu-iotests/241 b/tests/qemu-iotests/241
index 017a736aab..58b64ebf41 100755
--- a/tests/qemu-iotests/241
+++ b/tests/qemu-iotests/241
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Test qemu-nbd vs. unaligned images
 #
diff --git a/tests/qemu-iotests/243 b/tests/qemu-iotests/243
index 5838c6e89c..e563761307 100755
--- a/tests/qemu-iotests/243
+++ b/tests/qemu-iotests/243
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Test qcow2 preallocation
 #
diff --git a/tests/qemu-iotests/244 b/tests/qemu-iotests/244
index d8e7122305..13978f93d2 100755
--- a/tests/qemu-iotests/244
+++ b/tests/qemu-iotests/244
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 #
 # Test qcow2 with external data files
 #
-- 
2.21.0