diff --git a/tests/Unit/Property/AtRuleTest.php b/tests/Unit/Property/AtRuleTest.php
index 53793bea..6094fbf8 100644
--- a/tests/Unit/Property/AtRuleTest.php
+++ b/tests/Unit/Property/AtRuleTest.php
@@ -7,6 +7,9 @@
 use PHPUnit\Framework\TestCase;
 use Sabberworm\CSS\Property\AtRule;
 
+/**
+ * @coversNothing
+ */
 final class AtRuleTest extends TestCase
 {
     /**