diff --git a/.travis.yml b/.travis.yml
index 0c6840d..1c0ac22 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,4 @@
+dist: trusty
 language: php
 
 php:
diff --git a/composer.json b/composer.json
index 2bc64c1..35e0b58 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         "php" : "~5.6|~7.0"
     },
     "require-dev": {
-        "phpunit/phpunit" : "~4.0||~5.0||~6.0",
+        "phpunit/phpunit" : ">=5.4.3",
         "squizlabs/php_codesniffer": "^2.3"
     },
     "autoload": {
diff --git a/tests/ExampleTest.php b/tests/ExampleTest.php
index a3b4876..e2533c1 100644
--- a/tests/ExampleTest.php
+++ b/tests/ExampleTest.php
@@ -2,7 +2,7 @@
 
 namespace League\Skeleton;
 
-class ExampleTest extends \PHPUnit_Framework_TestCase
+class ExampleTest extends \PHPUnit\Framework\TestCase
 {
     /**
      * Test that true does in fact equal true