diff --git a/tests/extmod/vfs_fat_ramdisk.py b/tests/extmod/vfs_fat_ramdisk.py
index 362a85db5..e514fe228 100644
--- a/tests/extmod/vfs_fat_ramdisk.py
+++ b/tests/extmod/vfs_fat_ramdisk.py
@@ -55,3 +55,5 @@ f2.close()
 
 assert b"FOO_FILETXT" in bdev.data
 assert b"hello!" in bdev.data
+
+assert vfs.listdir() == ['foo_file.txt']