diff --git a/.travis.yml b/.travis.yml
index 41dd45b..4d85708 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,7 @@ env:
   - TESTS="1" ODOO_REPO="odoo/odoo"
 
 before_install:
+ - sudo apt-get install -y unoconv
  - "export PATH=$PWD/travis_phantomjs/phantomjs-2.1.1-linux-x86_64/bin:$PATH"
  - "if [ $(phantomjs --version) != '2.1.1' ]; then rm -rf $PWD/travis_phantomjs; mkdir -p $PWD/travis_phantomjs; fi"
  - "if [ $(phantomjs --version) != '2.1.1' ]; then wget https://assets.membergetmember.co/software/phantomjs-2.1.1-linux-x86_64.tar.bz2 -O $PWD/travis_phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2; fi"
@@ -31,7 +32,6 @@ before_install:
  - "phantomjs --version"
 
 install:
-  - sudo apt-get --yes unoconv
   - pip install cachetools
   - pip install pdfconv
   - git clone https://github.com/OCA/maintainer-quality-tools.git ${HOME}/maintainer-quality-tools
diff --git a/muk_web_preview_mail/tests/test_mail_parse.py b/muk_web_preview_mail/tests/test_mail_parse.py
index 462868d..69ac653 100644
--- a/muk_web_preview_mail/tests/test_mail_parse.py
+++ b/muk_web_preview_mail/tests/test_mail_parse.py
@@ -58,7 +58,10 @@ class MailParseTestCase(common.HttpCase):
         _logger.info(self.url_open('/'))  
         _logger.info(self.url_open('/').headers)    
         _logger.info(self.url_open('/').content)  
-        url = "/web/preview/converter/mail?url=/web/content/%s?download=true" % self.sample_mail_attachment.id
+        url = "/web/preview/converter/mail?url=/web/content/{}?download=true".format(
+           self.sample_mail_attachment.id
+        )
+        _logger.info(url)
         self.assertTrue(self.url_open(url))
         _logger.info(self.url_open(url))  
         _logger.info(self.url_open(url).headers)