diff --git a/tests/Composer/Test/Autoload/Fixtures/classmap/notPhpFile.md b/tests/Composer/Test/Autoload/Fixtures/classmap/notPhpFile.md
index 6e48e5a63..dc38b8e01 100644
--- a/tests/Composer/Test/Autoload/Fixtures/classmap/notPhpFile.md
+++ b/tests/Composer/Test/Autoload/Fixtures/classmap/notPhpFile.md
@@ -1 +1,7 @@
 This file should be skipped.
+
+<?php
+
+class mustSkip {
+
+}