diff --git a/.travis.yml b/.travis.yml
index 9432218..77d79e9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,10 +7,14 @@ rvm:
   - 2.1.7
   - 2.2.3
   - 2.3.1
+matrix:
+  exclude:
+    - rvm: 2.3.1
+    - os: osx
 notifications:
   webhooks:
     urls:
       - https://webhooks.gitter.im/e/907e95dada362be2a13c
     on_success: change  # options: [always|never|change] default: always
     on_failure: always  # options: [always|never|change] default: always
-    on_start: false     # default: false
+    on_start: never     # options: [always|never|change] default: always