Test on oldest supported SDK
diff --git a/.travis.yml b/.travis.yml
index 8b6048d..8a36529 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,18 @@
 language: dart
-sudo: false
+
 dart:
-  - dev
+- 2.0.0
+- dev
+
 dart_task:
-  - test
-  - dartfmt
-  - dartanalyzer
+- test
+- dartanalyzer: --fatal-infos --fatal-warnings .
+
+matrix:
+  include:
+  # Only validate formatting using the dev release
+  - dart: dev
+    dart_task: dartfmt
 
 # Only building master means that we don't run two builds for each pull request.
 branches:
@@ -13,4 +20,4 @@
 
 cache:
   directories:
-    - $HOME/.pub-cache
+  - $HOME/.pub-cache