diff --git a/tests/test_file.py b/tests/test_file.py
index bb17d8da6a522cd1e3cb3853d436e0adb3577975..1dbb3a4fb14a74527f771be466df152b1be63833 100644
--- a/tests/test_file.py
+++ b/tests/test_file.py
@@ -52,6 +52,7 @@ def setup():
     upload_file.write("hello world\n")
     upload_file.close()
     os.mkdir("testfolder")
+    os.mkdir("testfolder/subfolder")
     with open("testfolder/test1.dat", "w") as upload_file:
         upload_file.write("hello world\n")
     with open("testfolder/subfolder/test2.dat", "w") as upload_file: