diff --git a/tests/qemu-iotests/common.rc b/tests/qemu-iotests/common.rc
index a536bf70a7..442cf516ef 100644
--- a/tests/qemu-iotests/common.rc
+++ b/tests/qemu-iotests/common.rc
@@ -127,6 +127,8 @@ _make_test_img()
             -e "s# compat='[^']*'##g" \
             -e "s# compat6=\\(on\\|off\\)##g" \
             -e "s# static=\\(on\\|off\\)##g" \
+            -e "s# zeroed_grain=\\(on\\|off\\)##g" \
+            -e "s# subformat='[^']*'##g" \
             -e "s# lazy_refcounts=\\(on\\|off\\)##g"
 
     # Start an NBD server on the image file, which is what we'll be talking to