Delete default sec group
diff --git a/openstack/compute/v2/extensions/defsecrules/fixtures.go b/openstack/compute/v2/extensions/defsecrules/fixtures.go
index 2e02870..4aa7530 100644
--- a/openstack/compute/v2/extensions/defsecrules/fixtures.go
+++ b/openstack/compute/v2/extensions/defsecrules/fixtures.go
@@ -97,3 +97,13 @@
 			`)
 	})
 }
+
+func mockDeleteRuleResponse(t *testing.T, ruleID string) {
+	url := rootPath + "/" + ruleID
+	th.Mux.HandleFunc(url, func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "DELETE")
+		th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+		w.Header().Add("Content-Type", "application/json")
+		w.WriteHeader(http.StatusAccepted)
+	})
+}