diff --git a/modules/invoiceOut/back/methods/invoiceOut/specs/book.spec.js b/modules/invoiceOut/back/methods/invoiceOut/specs/book.spec.js
index 345e29125..fece307de 100644
--- a/modules/invoiceOut/back/methods/invoiceOut/specs/book.spec.js
+++ b/modules/invoiceOut/back/methods/invoiceOut/specs/book.spec.js
@@ -2,13 +2,16 @@ const app = require('vn-loopback/server/server');
 
 describe('invoiceOut book()', () => {
     const invoiceOutId = 1;
-    let invoiceOutRef;
+    let bookedDate;
     let OriginalInvoiceOut;
     let updatedInvoiceOut;
-    let bookedDate;
 
     afterAll(async done => {
-        updatedInvoiceOut.updateAttributes({booked: OriginalInvoiceOut.booked, hasPdf: OriginalInvoiceOut.hasPdf});
+        updatedInvoiceOut.updateAttributes({
+            booked: OriginalInvoiceOut.booked,
+            hasPdf: OriginalInvoiceOut.hasPdf,
+            amount: OriginalInvoiceOut.amount
+        });
 
         done();
     });
@@ -24,7 +27,7 @@ describe('invoiceOut book()', () => {
 
     it(`should confirm the book property have been updated`, async() => {
         OriginalInvoiceOut = await app.models.InvoiceOut.findById(invoiceOutId);
-        invoiceOutRef = OriginalInvoiceOut.ref;
+        let invoiceOutRef = OriginalInvoiceOut.ref;
 
         await app.models.InvoiceOut.book(invoiceOutRef);