diff --git a/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php b/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php
index 43e16165..3cc35e7d 100644
--- a/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php
+++ b/tests/Rules/NoSingleInterfaceImplementerRule/NoSingleInterfaceImplementerRuleTest.php
@@ -33,6 +33,9 @@ public static function provideData(): Iterator
         yield [[__DIR__ . '/Fixture/SimpleInterface.php'], []];
         yield [[__DIR__ . '/Fixture/AllowAbstract.php', __DIR__ . '/Fixture/SimpleInterface.php'], []];
 
+        // already counted in abstract class
+        yield [[__DIR__ . '/Fixture/AllowAbstract.php', __DIR__ . '/Fixture/SimpleInterface.php', __DIR__ . '/Fixture/ImplementsSimpleInterface.php'], []];
+
         yield [
             [
                 __DIR__ . '/Fixture/SimpleInterface.php',