diff --git a/modules/route/back/methods/route/specs/guessPriority.spec.js b/modules/route/back/methods/route/specs/guessPriority.spec.js
new file mode 100644
index 000000000..9d08dce7a
--- /dev/null
+++ b/modules/route/back/methods/route/specs/guessPriority.spec.js
@@ -0,0 +1,41 @@
+const app = require('vn-loopback/server/server');
+
+describe('route guessPriority()', () => {
+    const targetRouteId = 2;
+    let routeTicketsToRestore;
+
+    afterAll(async done => {
+        let restoreFixtures = [];
+        routeTicketsToRestore.forEach(ticket => {
+            restoreFixtures.push(ticket.updateAttribute('priority', null));
+        });
+        await Promise.all(restoreFixtures);
+
+        done();
+    });
+
+    it('should confirm the tickets in the target route have no priority yet', async() => {
+        routeTicketsToRestore = await app.models.Ticket.find({where: {routeFk: targetRouteId}});
+
+        expect(routeTicketsToRestore.length).toEqual(3);
+        expect(routeTicketsToRestore[0].priority).toBeNull();
+        expect(routeTicketsToRestore[0].id).toEqual(7);
+        expect(routeTicketsToRestore[1].priority).toBeNull();
+        expect(routeTicketsToRestore[1].id).toEqual(8);
+        expect(routeTicketsToRestore[2].priority).toBeNull();
+        expect(routeTicketsToRestore[2].id).toEqual(9);
+    });
+
+    it('should call guessPriority() and then check the tickets in the target route now have their priorities defined', async() => {
+        await app.models.Route.guessPriority(targetRouteId);
+        let routeTickets = await app.models.Ticket.find({where: {routeFk: targetRouteId}, fields: ['id', 'priority']});
+
+        expect(routeTickets.length).toEqual(3);
+        expect(routeTickets[0].priority).toEqual(1);
+        expect(routeTickets[0].id).toEqual(7);
+        expect(routeTickets[1].priority).toEqual(3);
+        expect(routeTickets[1].id).toEqual(8);
+        expect(routeTickets[2].priority).toEqual(2);
+        expect(routeTickets[2].id).toEqual(9);
+    });
+});