.travis.yml in knife-server-0.3.3 vs .travis.yml in knife-server-1.0.0

@@ -1,6 +1,16 @@
 language: ruby
 rvm:
-  - 1.9.3
-  - 1.9.2
-  - 1.8.7
-  - ree
+- 1.9.3
+- 1.9.2
+- ruby-head
+- 1.8.7
+- ree
+
+env:
+- "CHEF_VERSION=11.4.0"
+- "CHEF_VERSION=10.24.0"
+- "CHEF_VERSION=0.10.10"
+
+matrix:
+  allow_failures:
+  - rvm: ruby-head