diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozdevice/sut_tests/test_exec.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozdevice/sut_tests/test_exec.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import posixpath
+from StringIO import StringIO
+
+from dmunit import DeviceManagerTestCase
+
+class ExecTestCase(DeviceManagerTestCase):
+
+    def runTest(self):
+        """Simple exec test, does not use env vars."""
+        out = StringIO()
+        filename = posixpath.join(self.dm.getDeviceRoot(), 'test_exec_file')
+        # Make sure the file was not already there
+        self.dm.removeFile(filename)
+        self.dm.shell(['dd', 'if=/dev/zero', 'of=%s' % filename, 'bs=1024',
+                       'count=1'], out)
+        # Check that the file has been created
+        self.assertTrue(self.dm.fileExists(filename))
+        # Clean up
+        self.dm.removeFile(filename)