diff --git a/.travis.yml b/.travis.yml
index c58be69f..5f06d4c5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,9 @@ python:
   - "2.7"
 
 env:
-  - VERSION="7.0" ODOO_REPO="odoo/odoo"
-  - VERSION="7.0" ODOO_REPO="OCA/OCB"
+  - VERSION="7.0" LINT_CHECK=1
+  - VERSION="7.0" ODOO_REPO="odoo/odoo" LINT_CHECK=0
+  - VERSION="7.0" ODOO_REPO="OCA/OCB" LINT_CHECK=0
 
 virtualenv:
   system_site_packages: true
diff --git a/attachment_preview/model/ir_attachment.py b/attachment_preview/model/ir_attachment.py
index 908247ff..b00d3474 100644
--- a/attachment_preview/model/ir_attachment.py
+++ b/attachment_preview/model/ir_attachment.py
@@ -49,8 +49,8 @@ class IrAttachment(Model):
                 try:
                     import magic
                     ms = magic.open(
-                        hasattr(magic, 'MAGIC_MIME_TYPE')
-                        and magic.MAGIC_MIME_TYPE or magic.MAGIC_MIME)
+                        hasattr(magic, 'MAGIC_MIME_TYPE') and
+                        magic.MAGIC_MIME_TYPE or magic.MAGIC_MIME)
                     ms.load()
                     mimetype = ms.buffer(
                         base64.b64decode(this[binary_field]))