diff --git a/test/unit/Fixture/ClassesImplementingIterators.php b/test/unit/Fixture/ClassesImplementingIterators.php
index <HASH>..<HASH> 100644
--- a/test/unit/Fixture/ClassesImplementingIterators.php
+++ b/test/unit/Fixture/ClassesImplementingIterators.php
@@ -15,4 +15,12 @@ namespace BetterReflectionTest\ClassesImplementingIterators
     class NonTraversableImplementation
     {
     }
+
+    abstract class AbstractTraversableImplementation implements \Traversable
+    {
+    }
+
+    interface TraversableExtension extends \Traversable
+    {
+    }
 }
More test assets: iterable abstract `Traversable` implementations (that shouldn't be iteratable)