diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index b14ae51baa..ab2132fe98 100755
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -450,6 +450,9 @@ static const char *defaultConnXML =
 "      <source network='default' bridge='virbr0'/>"
 "      <address type='pci' domain='0x0000' bus='0x00' slot='0x1' function='0x0'/>"
 "    </interface>"
+"    <memballoon model='virtio'>"
+"      <address type='pci' domain='0x0000' bus='0x00' slot='0x2' function='0x0'/>"
+"    </memballoon>"
 "  </devices>"
 "</domain>"
 ""