diff --git a/tests/test_cli.py b/tests/test_cli.py
index ef27276a..cbeebd46 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1116,6 +1116,7 @@ c.add_invalid("--disk none --boot network --machine foobar", grep="domain type N
 c.add_invalid("--nodisks --boot network --arch mips --virt-type kvm", grep="any virtualization options for architecture 'mips'")
 c.add_invalid("--nodisks --boot network --paravirt --arch mips", grep=" 'xen' for architecture 'mips'")
 c.add_invalid("--osinfo generic --launchSecurity sev --connect " + utils.URIs.kvm_amd_sev, grep="SEV launch security requires a Q35 UEFI machine")
+c.add_invalid("--disk none --cloud-init --unattended --install fedora30", grep="--unattended and --cloud-init can not")
 
 
 
diff --git a/virtinst/virtinstall.py b/virtinst/virtinstall.py
index 37eef1fc..8260628d 100644
--- a/virtinst/virtinstall.py
+++ b/virtinst/virtinstall.py
@@ -411,6 +411,9 @@ def build_installer(options, guest, installdata):
         else:
             extra_args = [installdata.kernel_args]
 
+    if options.unattended and options.cloud_init:
+        fail("--unattended and --cloud-init can not be specified together.")
+
     if options.unattended:
         unattended_data = cli.parse_unattended(options.unattended)