Index: /trunk/src/VBox/ValidationKit/tests/installation/tdGuestOsUnattendedInst1.py
===================================================================
--- /trunk/src/VBox/ValidationKit/tests/installation/tdGuestOsUnattendedInst1.py	(revision 79421)
+++ /trunk/src/VBox/ValidationKit/tests/installation/tdGuestOsUnattendedInst1.py	(revision 79422)
@@ -374,6 +374,8 @@
         oSet.aoTestVms.extend([
             # Windows7 RTM:
-            UnattendedVm(oSet, 'tst-w7-32', 'Windows7',     '6.0/uaisos/en_windows_7_enterprise_x86_dvd_x15-70745.iso'),
-            UnattendedVm(oSet, 'tst-w7-64', 'Windows7_64',  '6.0/uaisos/en_windows_7_enterprise_x64_dvd_x15-70749.iso'),
+            UnattendedVm(oSet, 'tst-w7-32', 'Windows7',     '6.0/uaisos/en_windows_7_enterprise_x86_dvd_x15-70745.iso'), # 5.7GiB
+            UnattendedVm(oSet, 'tst-w7-64', 'Windows7_64',  '6.0/uaisos/en_windows_7_enterprise_x64_dvd_x15-70749.iso'), # 10GiB
+            UnattendedVm(oSet, 'tst-ubuntu-16.04-64', 'Ubuntu_64', '6.0/uaisos/ubuntu-16.04-desktop-amd64.iso'),
+            #UnattendedVm(oSet, 'tst-ubuntu-18.04-64', 'Ubuntu_64', '6.0/uaisos/ubuntu-18.04-desktop-amd64.iso'), # >=5.7GiB
         ]);
         self.oTestVmSet = oSet;
@@ -511,5 +513,5 @@
         if not self.importVBoxApi(): # So we can use the constant below.
             return False;
-        return self.oTestVmSet.actionConfig(self, eNic0AttachType = vboxcon.NetworkAttachmentType_NAT);
+        return self.oTestVmSet.actionConfig(self, eNic0AttachType = vboxcon.NetworkAttachmentType_HostOnly);
 
     def actionExecute(self):