diff --git a/rules-tests/TypeDeclarationDocblocks/Rector/Class_/ClassMethodArrayDocblockParamFromLocalCallsRector/Fixture/unique_types.php.inc b/rules-tests/TypeDeclarationDocblocks/Rector/Class_/ClassMethodArrayDocblockParamFromLocalCallsRector/Fixture/unique_types.php.inc
new file mode 100644
index 00000000000..8db2d62a7db
--- /dev/null
+++ b/rules-tests/TypeDeclarationDocblocks/Rector/Class_/ClassMethodArrayDocblockParamFromLocalCallsRector/Fixture/unique_types.php.inc
@@ -0,0 +1,42 @@
+<?php
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\Class_\ClassMethodArrayDocblockParamFromLocalCallsRector\Fixture;
+
+class UniqueTypes
+{
+    public function go()
+    {
+        $this->run(['item1', 'item2']);
+        $this->run([1, 2]);
+        $this->run(['item3', 'item4']);
+    }
+
+    private function run(array $items)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\Class_\ClassMethodArrayDocblockParamFromLocalCallsRector\Fixture;
+
+class UniqueTypes
+{
+    public function go()
+    {
+        $this->run(['item1', 'item2']);
+        $this->run([1, 2]);
+        $this->run(['item3', 'item4']);
+    }
+
+    /**
+     * @param string[]|int[] $items
+     */
+    private function run(array $items)
+    {
+    }
+}
+
+?>