diff --git a/api/v1/swagger/paths/acquisitions_vendors.yaml b/api/v1/swagger/paths/acquisitions_vendors.yaml
index 73839cd342..d18cec83e5 100644
--- a/api/v1/swagger/paths/acquisitions_vendors.yaml
+++ b/api/v1/swagger/paths/acquisitions_vendors.yaml
@@ -152,6 +152,7 @@
             - aliases
             - baskets+count
             - subscriptions+count
+            - invoices
             - invoices+count
             - interfaces
             - contacts
diff --git a/t/cypress/integration/Acquisitions/Invoices_spec.ts b/t/cypress/integration/Acquisitions/Invoices_spec.ts
new file mode 100644
index 0000000000..3ebe055223
--- /dev/null
+++ b/t/cypress/integration/Acquisitions/Invoices_spec.ts
@@ -0,0 +1,76 @@
+describe("Invoices - Files for invoices", () => {
+    beforeEach(() => {
+        cy.login();
+        cy.title().should("eq", "Koha staff interface");
+
+        cy.task("buildSampleObject", {
+            object: "vendor",
+            values: { active: 1 },
+        })
+            .then(generatedVendor => {
+                delete generatedVendor.list_currency;
+                delete generatedVendor.invoice_currency;
+                return cy.task("insertObject", {
+                    type: "vendor",
+                    object: generatedVendor,
+                });
+            })
+            .then(vendor => {
+                cy.wrap(vendor).as("vendor");
+                return cy.task("buildSampleObject", {
+                    object: "invoice",
+                    values: { vendor_id: vendor.id },
+                });
+            })
+            .then(generatedInvoice => {
+                return cy.task("insertObject", {
+                    type: "invoice",
+                    object: generatedInvoice,
+                });
+            })
+            .then(invoice => {
+                cy.wrap(invoice).as("invoice");
+            });
+
+        cy.task("query", {
+            sql: "SELECT value FROM systempreferences WHERE variable='AcqEnableFiles'",
+        }).then(value => {
+            cy.wrap(value).as("syspref_AcqEnableFiles");
+        });
+    });
+
+    afterEach(function () {
+        cy.task("deleteSampleObjects", [
+            { vendor: this.vendor, invoice: this.invoice },
+        ]);
+        cy.set_syspref("AcqEnableFiles", this.syspref_AcqEnableFiles);
+    });
+
+    it("should return 404 if AcqEnableFiles is disabled", function () {
+        const invoice = this.invoice;
+        cy.set_syspref("AcqEnableFiles", 0).then(() => {
+            cy.intercept(
+                `/cgi-bin/koha/acqui/invoice-files.pl?invoiceid=${invoice.invoice_id}`
+            ).as("show-invoice");
+            cy.visit(
+                `/cgi-bin/koha/acqui/invoice-files.pl?invoiceid=${invoice.invoice_id}`,
+                { failOnStatusCode: false }
+            );
+            cy.wait("@show-invoice")
+                .its("response.statusCode")
+                .should("equal", 404);
+        });
+    });
+
+    it("should not return 404 if AcqEnableFiles is enabled", function () {
+        const invoice = this.invoice;
+        cy.set_syspref("AcqEnableFiles", 1).then(() => {
+            cy.visit(
+                `/cgi-bin/koha/acqui/invoice-files.pl?invoiceid=${invoice.invoice_id}`
+            );
+            cy.get("h1").contains(
+                `Files for invoice: ${invoice.invoice_number}`
+            );
+        });
+    });
+});
diff --git a/t/cypress/plugins/insertData.js b/t/cypress/plugins/insertData.js
index 3aa062611a..e7a90c726d 100644
--- a/t/cypress/plugins/insertData.js
+++ b/t/cypress/plugins/insertData.js
@@ -808,6 +808,40 @@ const insertObject = async ({ type, object, baseUrl, authHeader }) => {
                 });
             })
             .then(baskets => baskets[0]);
+    } else if (type == "invoice") {
+        const keysToKeep = [
+            "invoice_number",
+            "vendor_id",
+            "shipping_date",
+            "invoice_date",
+        ];
+        const invoice = Object.fromEntries(
+            Object.entries(object).filter(([key]) => keysToKeep.includes(key))
+        );
+        return query({
+            sql: "INSERT INTO aqinvoices(invoicenumber, booksellerid, shipmentdate, billingdate) VALUES (?, ?, ?, ?)",
+            values: [
+                invoice.invoice_number,
+                invoice.vendor_id,
+                invoice.shipping_date,
+                invoice.invoice_date,
+            ],
+        })
+            .then(result => {
+                const invoice_id = result.insertId;
+                // FIXME We need /acquisitions/invoices/:invoice_id
+                return apiGet({
+                    endpoint: `/api/v1/acquisitions/vendors/${invoice.vendor_id}`,
+                    headers: { "x-koha-embed": "invoices" },
+                    baseUrl,
+                    authHeader,
+                });
+            })
+            .then(vendor =>
+                vendor.invoices.find(
+                    i => i.invoice_number == invoice.invoice_number
+                )
+            );
     } else {
         throw Error(`Unsupported object type '${type}' to insert`);
     }