diff --git a/dash/tests.py b/dash/tests.py
index 899adea..52a9c91 100644
--- a/dash/tests.py
+++ b/dash/tests.py
@@ -30,6 +30,7 @@ from payments import get_payment_model, RedirectNeeded, PaymentStatus
 from accounts.tests import login_util, register_util
 
 from .models import InstanceConfiguration, Instance
+from .utils import create_instance, VmErrors, VmException
 
 
 def create_configurations(t: TestCase):
@@ -197,6 +198,27 @@ class CreateInstance(TestCase):
         register_util(t=self, username="createinstance_user")
         create_configurations(t=self)
 
+    @override_settings(
+        HOSTEA=infra_custom_config(test_name="test_create_instance_util")
+    )
+    def test_create_instance_util(self):
+        vm_name = "test_create_instance_renders"
+        configuration = self.instance_config[0].name
+
+        with self.assertRaises(VmException):
+            create_instance(
+                vm_name="12345452131324234234234234",
+                configuration_name=configuration,
+                user=self.user,
+            )
+
+        with self.assertRaises(VmException):
+            create_instance(
+                vm_name="122342$#34234",
+                configuration_name=configuration,
+                user=self.user,
+            )
+
     @override_settings(
         HOSTEA=infra_custom_config(test_name="test_create_instance_renders")
     )