diff --git a/.travis.yml b/.travis.yml
index 2fc7ac07..de2e5e6c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,5 @@
+dist: trusty
+
 language: php
 
 php:
@@ -6,6 +8,7 @@ php:
   - 5.5
   - 5.6
   - 7.0
+  - 7.1
   - hhvm
 
 before_install:
@@ -23,7 +26,7 @@ before_script:
 
 script:
   - mkdir -p build/logs
-  - phpunit --coverage-clover build/logs/clover.xml
+  - vendor/bin/phpunit --coverage-clover build/logs/clover.xml
 
 after_script:
   - vendor/bin/coveralls
diff --git a/composer.json b/composer.json
index 16abfd32..b0c58550 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,8 @@
         "ext-curl": "*"
     },
     "require-dev": {
-        "satooshi/php-coveralls": "^1.0||^2.0"
+        "satooshi/php-coveralls": "^1.0||^2.0",
+        "phpunit/phpunit": "^4.8"
     },
     "autoload": {
         "psr-0": {