vfsStream via pyrus
diff --git a/.travis.yml b/.travis.yml
index 87e528f..405d0a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@
   - 5.4
 
 before_script:
+  - pyrus channel-discover pear.php-tools.net
   - pyrus install http://pear.php-tools.net/get/vfsStream-0.11.2.tgz
   - phpenv rehash