--- /dev/null
+From 3da4873bcdcb7d8bd47e275b97bbb6f1c134b3b9 Mon Sep 17 00:00:00 2001
+From: Pierre-Jean Texier <pjtexier@koncepto.io>
+Date: Sat, 29 Jun 2019 21:19:08 +0200
+Subject: [PATCH] setup.py: require pytest-runner only when necessary
+
+This optimizes setup.py for cases when pytest-runner is not needed,
+using the approach that is suggested upstream:
+
+https://pypi.python.org/pypi/pytest-runner#conditional-requirement
+
+[Upstream status: https://github.com/hardbyte/python-can/pull/633]
+Signed-off-by: Pierre-Jean Texier <pjtexier@koncepto.io>
+---
+ setup.py | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/setup.py b/setup.py
+index 221c030..6e1778a 100644
+--- a/setup.py
++++ b/setup.py
+@@ -11,6 +11,7 @@ from os import listdir
+ from os.path import isfile, join
+ import re
+ import logging
++import sys
+ from setuptools import setup, find_packages
+
+ logging.basicConfig(level=logging.WARNING)
+@@ -40,6 +41,8 @@ tests_require = [
+
+ extras_require["test"] = tests_require
+
++needs_pytest = {'pytest', 'test', 'ptr'}.intersection(sys.argv)
++pytest_runner = ['pytest-runner'] if needs_pytest else []
+
+ setup(
+ # Description
+@@ -96,7 +99,7 @@ setup(
+ 'windows-curses;platform_system=="Windows"',
+ "filelock",
+ ],
+- setup_requires=["pytest-runner"],
++ setup_requires=pytest_runner,
+ extras_require=extras_require,
+ tests_require=tests_require,
+ )
+--
+2.7.4
+
#
################################################################################
-PYTHON_CAN_VERSION = 3.1.1
-PYTHON_CAN_SITE = https://files.pythonhosted.org/packages/c1/b0/72d7ed7840692ace5b55dd1155409cd86fd83cee4ded75e3d1102c08750a
+PYTHON_CAN_VERSION = 3.3.0
+PYTHON_CAN_SITE = https://files.pythonhosted.org/packages/9c/1e/a10b6f038a4a4bdd89d13ecc5fba36b71ab716fbd9eae9feda1d975d9504
PYTHON_CAN_SETUP_TYPE = setuptools
PYTHON_CAN_LICENSE = LGPL-3.0
PYTHON_CAN_LICENSE_FILES = LICENSE.txt