.travis.yml in devise-two-factor-3.0.1 vs .travis.yml in devise-two-factor-3.0.2

@@ -7,10 +7,11 @@
 gemfile:
   - Gemfile
   - gemfiles/rails_4_1.gemfile
   - gemfiles/rails_4_2.gemfile
   - gemfiles/rails_5_0.gemfile
+  - gemfiles/rails_5_1.gemfile
 rvm:
   - "2.1"
   - "2.2"
   - "2.3.4"
   - "2.4.0"
@@ -19,5 +20,9 @@
   exclude:
     - rvm: "2.1"
       gemfile: gemfiles/rails_5_0.gemfile
     - rvm: "2.2"
       gemfile: gemfiles/rails_5_0.gemfile
+    - rvm: "2.1"
+      gemfile: gemfiles/rails_5_1.gemfile
+    - rvm: "2.2"
+      gemfile: gemfiles/rails_5_1.gemfile