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diff --git a/src/silx/app/view/test/test_launcher.py b/src/silx/app/view/test/test_launcher.py
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+++ b/src/silx/app/view/test/test_launcher.py
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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2017 European Synchrotron Radiation Facility
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ###########################################################################*/
+"""Module testing silx.app.view"""
+
+__authors__ = ["V. Valls"]
+__license__ = "MIT"
+__date__ = "07/06/2018"
+
+
+import os
+import shutil
+import sys
+import tempfile
+import unittest
+import logging
+import subprocess
+import pytest
+
+from .. import main
+from silx import __main__ as silx_main
+
+_logger = logging.getLogger(__name__)
+
+
+@pytest.mark.usefixtures("qapp")
+class TestLauncher(unittest.TestCase):
+    """Test command line parsing"""
+
+    def testHelp(self):
+        # option -h must cause a raise SystemExit or a return 0
+        try:
+            parser = main.createParser()
+            parser.parse_args(["view", "--help"])
+            result = 0
+        except SystemExit as e:
+            result = e.args[0]
+        self.assertEqual(result, 0)
+
+    def testWrongOption(self):
+        try:
+            parser = main.createParser()
+            parser.parse_args(["view", "--foo"])
+            self.fail()
+        except SystemExit as e:
+            result = e.args[0]
+        self.assertNotEqual(result, 0)
+
+    def testWrongFile(self):
+        try:
+            parser = main.createParser()
+            result = parser.parse_args(["view", "__file.not.found__"])
+            result = 0
+        except SystemExit as e:
+            result = e.args[0]
+        self.assertEqual(result, 0)
+
+    def executeAsScript(self, filename, *args):
+        """Execute a command line.
+
+        Log output as debug in case of bad return code.
+        """
+        env = self.createTestEnv()
+
+        with tempfile.TemporaryDirectory() as tmpdir:
+            # Copy file to temporary dir to avoid import from current dir.
+            script = os.path.join(tmpdir, 'launcher.py')
+            shutil.copyfile(filename, script)
+            command_line = [sys.executable, script] + list(args)
+
+            _logger.info("Execute: %s", " ".join(command_line))
+            p = subprocess.Popen(command_line,
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.PIPE,
+                                 env=env)
+            out, err = p.communicate()
+            _logger.info("Return code: %d", p.returncode)
+            try:
+                out = out.decode('utf-8')
+            except UnicodeError:
+                pass
+            try:
+                err = err.decode('utf-8')
+            except UnicodeError:
+                pass
+
+            if p.returncode != 0:
+                _logger.info("stdout:")
+                _logger.info("%s", out)
+                _logger.info("stderr:")
+                _logger.info("%s", err)
+            else:
+                _logger.debug("stdout:")
+                _logger.debug("%s", out)
+                _logger.debug("stderr:")
+                _logger.debug("%s", err)
+            self.assertEqual(p.returncode, 0)
+
+    def createTestEnv(self):
+        """
+        Returns an associated environment with a working project.
+        """
+        env = dict((str(k), str(v)) for k, v in os.environ.items())
+        env["PYTHONPATH"] = os.pathsep.join(sys.path)
+        return env
+
+    def testExecuteViewHelp(self):
+        """Test if the main module is well connected.
+
+        Uses subprocess to avoid to parasite the current environment.
+        """
+        self.executeAsScript(main.__file__, "--help")
+
+    def testExecuteSilxViewHelp(self):
+        """Test if the main module is well connected.
+
+        Uses subprocess to avoid to parasite the current environment.
+        """
+        self.executeAsScript(silx_main.__file__, "view", "--help")