diff --git a/qubes/tests/vm/mix/net.py b/qubes/tests/vm/mix/net.py
index 356f65a7..5b9e45bc 100644
--- a/qubes/tests/vm/mix/net.py
+++ b/qubes/tests/vm/mix/net.py
@@ -96,6 +96,15 @@ class TC_00_NetVMMixin(
         self.addCleanup(self.app.domains.clear)
         self.assertPropertyInvalidValue(vm, 'netvm', vm)
 
+    def test_144_netvm_loopback2(self):
+        vm = self.get_vm()
+        self.setup_netvms(vm)
+        vm.netvm = None
+        self.netvm2.netvm = self.netvm1
+        vm.provides_network = True
+        self.netvm1.netvm = vm
+        self.assertPropertyInvalidValue(vm, 'netvm', self.netvm2)
+
     def test_150_ip(self):
         vm = self.get_vm()
         self.setup_netvms(vm)
diff --git a/qubes/tests/vm/qubesvm.py b/qubes/tests/vm/qubesvm.py
index b98363a4..ccd62b4b 100644
--- a/qubes/tests/vm/qubesvm.py
+++ b/qubes/tests/vm/qubesvm.py
@@ -121,9 +121,9 @@ class QubesVMTestsMixin(object):
         self.app = qubes.tests.vm.TestApp()
         self.app.vmm.offline_mode = True
 
-    def get_vm(self, **kwargs):
+    def get_vm(self, name='test', **kwargs):
         vm = qubes.vm.qubesvm.QubesVM(self.app, None,
-            qid=1, name=qubes.tests.VMPREFIX + 'test',
+            qid=1, name=qubes.tests.VMPREFIX + name,
             **kwargs)
         self.addCleanup(vm.close)
         return vm