diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000000..a4d2595986
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,9 @@
+image: python2.7
+env:
+  - POSTGRESQL_URI=postgresql://postgres@127.0.0.1:5432/
+  - MYSQL_URI=mysql://root@127.0.0.1:3306/
+script:
+  - pip install tox
+  - tox -e sqlite,postgresql
+services:
+  - postgres
diff --git a/tests/test_stock_split.py b/tests/test_stock_split.py
index d8a030a845..6a9070ad4e 100644
--- a/tests/test_stock_split.py
+++ b/tests/test_stock_split.py
@@ -1,6 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 import unittest
+import doctest
 from decimal import Decimal
 import trytond.tests.test_tryton
 from trytond.tests.test_tryton import POOL, DB_NAME, USER, CONTEXT, test_view,\
@@ -114,7 +115,7 @@ def suite():
     suite = trytond.tests.test_tryton.suite()
     from trytond.modules.company.tests import test_company
     for test in test_company.suite():
-        if test not in suite:
+        if test not in suite and not isinstance(test, doctest.DocTestCase):
             suite.addTest(test)
     suite.addTests(unittest.TestLoader().loadTestsFromTestCase(
             StockSplitTestCase))
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000000..e213af00e6
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,16 @@
+[tox]
+envlist = py27-{sqlite,postgresql,mysql}
+
+[testenv]
+commands = {envpython} setup.py test
+deps =
+    postgresql: psycopg2 >= 2.0
+    mysql: MySQL-python
+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/ {opts} {packages}