diff --git a/composer.json b/composer.json
index 59862a66c325ce45fd0f4ca59baa923df6ad58ad..f34749495d95330d3b9bdc1c5ff1b41c26f8debf 100644
--- a/composer.json
+++ b/composer.json
@@ -7,5 +7,8 @@
     },
     "require": {
         "guzzlehttp/guzzle": "~6.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^8.4"
     }
 }
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000000000000000000000000000000000000..48e0d4f5b75944de00bca137d8d2b3754836d3fc
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<phpunit bootstrap="vendor/autoload.php">
+  <testsuite name="default">
+    <directory suffix="Test.php">tests</directory>
+  </testsuite>
+</phpunit>