Avoid the generation in all the case
diff --git a/.travis.yml b/.travis.yml
index 4acbfae..50d943e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -97,4 +97,4 @@
 env:
   global:
     - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
-    - GENERATE_DOCS="true"
+    - GENERATE_DOCS="false"