diff --git a/sub/test_src.txt b/sub/test_src.txt
new file mode 100644
index 0000000..10ae772
--- /dev/null
+++ b/sub/test_src.txt
@@ -0,0 +1,10 @@
+test 1
+test 2
+test 3
+test 4
+test 5
+test 6
+test 7
+test 8
+test 9
+test 10