diff -r 000000000000 -r 6474c204b198 testing/mozbase/mozdevice/sut_tests/test_exec_env.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/testing/mozbase/mozdevice/sut_tests/test_exec_env.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+# 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 os
+import posixpath
+from StringIO import StringIO
+
+from dmunit import DeviceManagerTestCase
+
+class ExecEnvTestCase(DeviceManagerTestCase):
+
+    def runTest(self):
+        """Exec test with env vars."""
+        # Push the file
+        localfile = os.path.join('test-files', 'test_script.sh')
+        remotefile = posixpath.join(self.dm.getDeviceRoot(), 'test_script.sh')
+        self.dm.pushFile(localfile, remotefile)
+
+        # Run the cmd
+        out = StringIO()
+        self.dm.shell(['sh', remotefile], out, env={'THE_ANSWER': 42})
+
+        # Rewind the output file
+        out.seek(0)
+        # Make sure first line is 42
+        line = out.readline()
+        self.assertTrue(int(line) == 42)
+
+        # Clean up
+        self.dm.removeFile(remotefile)