diff --git a/tests/qemu-iotests/025 b/tests/qemu-iotests/025
index a7241ccc9583ecea2cac42701dafdac680008386..9426c93bd084d65ad7775ab246d095d8bfdc8c86 100755
--- a/tests/qemu-iotests/025
+++ b/tests/qemu-iotests/025
@@ -56,7 +56,7 @@ _check_test_img
 
 echo
 echo "=== Resizing image"
-$QEMU_IO "$TEST_IMG" <<EOF
+$QEMU_IO "$TEST_IMG" <<EOF | _filter_qemu_io
 length
 truncate $big_size
 length