diff --git a/tests/DNSClientPhpVersionTest.php b/tests/DNSClientPhpVersionTest.php
new file mode 100644
index 0000000..48c1436
--- /dev/null
+++ b/tests/DNSClientPhpVersionTest.php
@@ -0,0 +1,21 @@
+<?php
+declare(strict_types=1);
+
+namespace {
+
+    use PHPUnit\Framework\TestCase;
+
+    class DNSClientPhpVersionTest extends TestCase
+    {
+        public function testPhpVersion()
+        {
+            $this->assertTrue(
+                version_compare(phpversion(), '8.1', '>='),
+                sprintf(
+                    'Php version should greater than %s',
+                    '8.1'
+                )
+            );
+        }
+    }
+}