diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..9f91ecb
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,49 @@
+clone:
+    hg:
+        image: plugins/hg
+
+pipeline:
+    tox:
+        image: ${IMAGE}
+        environment:
+            - CFLAGS=-O0
+            - DB_CACHE=/cache
+            - TOX_TESTENV_PASSENV=CFLAGS DB_CACHE
+            - POSTGRESQL_URI=postgresql://postgres@postgresql:5432/
+        commands:
+            - pip install tox
+            - tox -e "${TOXENV}-${DATABASE}"
+
+services:
+    postgresql:
+        image: postgres
+        when:
+            matrix:
+                DATABASE: postgresql
+
+matrix:
+    include:
+        - IMAGE: python:2.7
+          TOXENV: py27
+          DATABASE: sqlite
+        - IMAGE: python:2.7
+          TOXENV: py27
+          DATABASE: postgresql
+        - IMAGE: python:3.4
+          TOXENV: py34
+          DATABASE: sqlite
+        - IMAGE: python:3.4
+          TOXENV: py34
+          DATABASE: postgresql
+        - IMAGE: python:3.5
+          TOXENV: py35
+          DATABASE: sqlite
+        - IMAGE: python:3.5
+          TOXENV: py35
+          DATABASE: postgresql
+        - IMAGE: python:3.6
+          TOXENV: py36
+          DATABASE: sqlite
+        - IMAGE: python:3.6
+          TOXENV: py36
+          DATABASE: postgresql
diff --git a/__init__.py b/__init__.py
index cbf4e19..a10f07b 100644
--- a/__init__.py
+++ b/__init__.py
@@ -1,9 +1,10 @@
 # The COPYRIGHT file at the top level of this repository contains the full
 # copyright notices and license terms.
 from trytond.pool import Pool
-from .stock import *
+from . import stock
+
 
 def register():
     Pool.register(
-        Move,
+        stock.Move,
         module='stock_lot_fifo', type_='model')
diff --git a/setup.py b/setup.py
index cec1a1a..0a51b1f 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,11 @@
 from setuptools import setup
 import re
 import os
-import ConfigParser
+import io
+try:
+    from configparser import ConfigParser
+except ImportError:
+    from ConfigParser import ConfigParser
 
 MODULE = 'stock_lot_fifo'
 PREFIX = 'nantic'
@@ -12,30 +16,43 @@ MODULE2PREFIX = {}
 
 
 def read(fname):
-    return open(os.path.join(os.path.dirname(__file__), fname)).read()
+    return io.open(
+        os.path.join(os.path.dirname(__file__), fname),
+        'r', encoding='utf-8').read()
 
-config = ConfigParser.ConfigParser()
+
+def get_require_version(name):
+    if minor_version % 2:
+        require = '%s >= %s.%s.dev0, < %s.%s'
+    else:
+        require = '%s >= %s.%s, < %s.%s'
+    require %= (name, major_version, minor_version,
+        major_version, minor_version + 1)
+    return require
+
+config = ConfigParser()
 config.readfp(open('tryton.cfg'))
 info = dict(config.items('tryton'))
 for key in ('depends', 'extras_depend', 'xml'):
     if key in info:
         info[key] = info[key].strip().splitlines()
-major_version, minor_version, _ = info.get('version', '0.0.1').split('.', 2)
+version = info.get('version', '0.0.1')
+major_version, minor_version, _ = version.split('.', 2)
 major_version = int(major_version)
 minor_version = int(minor_version)
 
 requires = []
 for dep in info.get('depends', []):
-    if not re.match(r'(ir|res|webdav)(\W|$)', dep):
+    if not re.match(r'(ir|res)(\W|$)', dep):
         prefix = MODULE2PREFIX.get(dep, 'trytond')
-        requires.append('%s_%s >= %s.%s, < %s.%s' %
-                (prefix, dep, major_version, minor_version,
-                major_version, minor_version + 1))
-requires.append('trytond >= %s.%s, < %s.%s' %
-        (major_version, minor_version, major_version, minor_version + 1))
+        requires.append(get_require_version('%s_%s' % (prefix, dep)))
+requires.append(get_require_version('trytond'))
 
-tests_require = ['proteus >= %s.%s, < %s.%s' %
-    (major_version, minor_version, major_version, minor_version + 1)]
+tests_require = []
+dependency_links = []
+if minor_version % 2:
+    # Add development index for testing with proteus
+    dependency_links.append('https://trydevpi.tryton.org/')
 
 setup(name='%s_%s' % (PREFIX, MODULE),
     version=info.get('version', '0.0.1'),
@@ -71,12 +88,17 @@ setup(name='%s_%s' % (PREFIX, MODULE),
         'Natural Language :: Russian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: Implementation :: CPython',
+        'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Office/Business',
         ],
     license='GPL-3',
     install_requires=requires,
+    dependency_links=dependency_links,
     zip_safe=False,
     entry_points="""
     [trytond.modules]
@@ -85,4 +107,5 @@ setup(name='%s_%s' % (PREFIX, MODULE),
     test_suite='tests',
     test_loader='trytond.test_loader:Loader',
     tests_require=tests_require,
+    use_2to3=True,
     )
diff --git a/stock.py b/stock.py
index 04b86f6..c3c7b68 100644
--- a/stock.py
+++ b/stock.py
@@ -1,13 +1,13 @@
-#The COPYRIGHT file at the top level of this repository contains the full
-#copyright notices and license terms.
+# The COPYRIGHT file at the top level of this repository contains the full
+# copyright notices and license terms.
 from trytond.pool import Pool, PoolMeta
 from trytond.transaction import Transaction
 
 __all__ = ['Move']
-__metaclass__ = PoolMeta
 
 
 class Move:
+    __metaclass__ = PoolMeta
     __name__ = 'stock.move'
 
     @property
@@ -59,7 +59,7 @@ class Move:
         for move in moves:
             if (not move.lot and move.product.lot_is_required(
                         move.from_location, move.to_location)):
-                if not move.product.id in lots_by_product:
+                if move.product.id not in lots_by_product:
                     with Transaction().set_context(move.fifo_search_context):
                         lots_by_product[move.product.id] = Lot.search(
                             move.fifo_search_domain, order=order)
diff --git a/tests/__init__.py b/tests/__init__.py
index b3625e4..1051d77 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,5 +1,8 @@
 # The COPYRIGHT file at the top level of this repository contains the full
 # copyright notices and license terms.
-from .test_stock_lot_fifo import suite
+try:
+    from trytond.modules.stock_lot_fifo.tests.test_stock_lot_fifo import suite
+except ImportError:
+    from .test_stock_lot_fifo import suite
 
 __all__ = ['suite']
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..ad44320
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,18 @@
+[tox]
+envlist = {py27,py34,py35,py36}-{sqlite,postgresql,mysql},pypy-{sqlite,postgresql}
+
+[testenv]
+commands = {envpython} setup.py test
+deps =
+    {py27,py34,py35,py36}-postgresql: psycopg2 >= 2.5
+    pypy-postgresql: psycopg2cffi >= 2.5
+    mysql: MySQL-python
+    sqlite: sqlitebck
+setenv =
+    sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}
+    postgresql: TRYTOND_DATABASE_URI={env:POSTGRESQL_URI:postgresql://}
+    mysql: TRYTOND_DATABASE_URI={env:MYSQL_URI:mysql://}
+    sqlite: DB_NAME={env:SQLITE_NAME::memory:}
+    postgresql: DB_NAME={env:POSTGRESQL_NAME:test}
+    mysql: DB_NAME={env:MYSQL_NAME:test}
+install_command = pip install --pre --find-links https://trydevpi.tryton.org/ --process-dependency-links {opts} {packages}
diff --git a/tryton.cfg b/tryton.cfg
index b165f3a..9969821 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=4.1.0
+version=4.7.0
 depends:
     stock_lot
 extras_depend: