diff --git a/composer.json b/composer.json
index 91bd0a4..17f867a 100644
--- a/composer.json
+++ b/composer.json
@@ -28,6 +28,6 @@
     ]
   },
   "scripts": {
-    "test": "vendor/bin/phpunit"
+    "test": "vendor/bin/phpunit --testsuite unit"
   }
 }
diff --git a/phpunit.xml b/phpunit.xml
index ed22603..6c99803 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -3,8 +3,11 @@
   bootstrap="tests/bootstrap.php"
   beStrictAboutTestsThatDoNotTestAnything="true">
   <testsuites>
-    <testsuite name="comments">
-      <directory suffix="Test.php">tests</directory>
+    <testsuite name="unit">
+      <directory suffix="Test.php">tests/unit</directory>
+    </testsuite>
+    <testsuite name="integration">
+      <directory suffix="Test.php">tests/integration</directory>
     </testsuite>
   </testsuites>
   <filter>
diff --git a/tests/CacheTest.php b/tests/integration/CacheTest.php
similarity index 100%
rename from tests/CacheTest.php
rename to tests/integration/CacheTest.php
diff --git a/tests/DateTest.php b/tests/unit/DateTest.php
similarity index 100%
rename from tests/DateTest.php
rename to tests/unit/DateTest.php
diff --git a/tests/URLTest.php b/tests/unit/URLTest.php
similarity index 100%
rename from tests/URLTest.php
rename to tests/unit/URLTest.php
diff --git a/tests/UtilsTest.php b/tests/unit/UtilsTest.php
similarity index 100%
rename from tests/UtilsTest.php
rename to tests/unit/UtilsTest.php