diff --git a/tests/extmod/vfs_fat_fileio2.py b/tests/extmod/vfs_fat_fileio2.py
index a9cea2bed834..531dd91f9490 100644
--- a/tests/extmod/vfs_fat_fileio2.py
+++ b/tests/extmod/vfs_fat_fileio2.py
@@ -112,3 +112,4 @@ def ioctl(self, op, arg):
     f.write(bytearray(bsize * free))
 except OSError as e:
     print("ENOSPC:", e.args[0] == 28)  # uerrno.ENOSPC
+f.close()