diff --git a/.travis.yml b/.travis.yml
index 20cfa80..bcb196d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,8 @@ env:
   global:
     - REQUIRE_RECIPE_TESTING="^1"
     - REQUIRE_FRAMEWORKTEST="0.3.0"
+    # vfsstream is a dev dependency of the assets module
+    - REQUIRE_EXTRA="mikey179/vfsstream:^1.6"
 
 matrix:
   fast_finish: true