diff --git a/Gruntfile.js b/Gruntfile.js
index cdfb832..e3a4cd1 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -53,6 +53,12 @@ module.exports = function (grunt) {
                 }
             },
             phpunit: {
+                options: {
+                    bin: './vendor/bin/phpunit',
+                    stopOnError: true,
+                    stopOnFailure: true,
+                    followOutput: true
+                },
                 classes: {
                     dir: 'tests/'
                 }
diff --git a/composer.json b/composer.json
index 76d8d59..c49e912 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,8 @@
 	},
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 		"symfony/var-dumper": "~3.1.0",
-		"squizlabs/php_codesniffer": "~2.6.2"
+		"squizlabs/php_codesniffer": "~2.6.2",
+		"phpunit/phpunit": "~5.4.8"
 	},
 	"extra": {
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diff --git a/composer.lock b/composer.lock
index 0e3044d..9c5f342 100644
--- a/composer.lock
+++ b/composer.lock
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+    "content-hash": "7c6b3489b6f538977ddbb243bcc1261e",
     "packages": [
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@@ -702,6 +702,1204 @@
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+                }
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+            "license": [
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+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
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+            "keywords": [
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+            ],
+            "time": "2015-06-14 21:17:01"
+        },
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+            "version": "1.5.1",
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                 "dump"
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