diff --git a/lib/src/tests/halAutoComplete.test.jsx b/lib/src/tests/halAutoComplete.test.jsx
index 09938b7..31a3c50 100644
--- a/lib/src/tests/halAutoComplete.test.jsx
+++ b/lib/src/tests/halAutoComplete.test.jsx
@@ -1,5 +1,6 @@
 import { fireEvent, render, waitFor } from "@testing-library/react";
 import HalAutocomplete from "../components/HalAutocomplete";
+import { HalApiCaller } from "@dxc-technology/halstack-client";
 
 // Mocking DOMRect for Radix Primitive Popover
 global.globalThis = global;
@@ -11,6 +12,7 @@ global.ResizeObserver = class ResizeObserver {
   unobserve() {}
   disconnect() {}
 };
+
 describe("HalAutocomplete component tests", () => {
   test("HalAutocomplete renders with correct options", async () => {
     const { getByRole, getByText } = render(
@@ -26,4 +28,85 @@ describe("HalAutocomplete component tests", () => {
     expect(list).toBeTruthy();
     await waitFor(() => expect(getByText("CGU AUTO PA / SCOB mandatory")).toBeTruthy());
   });
+
+  test("HalAutocomplete renders empty without collectionUrl", async () => {
+    const { queryByRole } = render(
+      <HalAutocomplete propertyName="baseCompany" label="Company name" />
+    );
+    const list = queryByRole("listbox");
+    expect(list).not.toBeTruthy();
+  });
+
+  test("HalAutocomplete calls asyncHeadersHandler", async () => {
+    const mockAsyncHeadersHandler = jest.fn();
+
+    render(
+      <HalAutocomplete
+        collectionUrl="http://localhost:3000/response"
+        propertyName="baseCompany"
+        label="Company name"
+        asyncHeadersHandler={mockAsyncHeadersHandler}
+      />
+    );
+
+    await waitFor(() => expect(mockAsyncHeadersHandler).toHaveBeenCalled());
+
+    expect(mockAsyncHeadersHandler).toHaveBeenCalledTimes(1);
+  });
+});
+
+describe("HalAutocomplete component URL handling tests", () => {
+  test("API call adds '&' if URL includes '?'", async () => {
+    const mockedGet = jest.fn();
+    HalApiCaller.get = mockedGet.mockResolvedValue({
+      halResource: { getItems: () => [{ summary: { baseCompany: "Test Company" } }] },
+    });
+
+    const { getByRole } = render(
+      <HalAutocomplete
+        collectionUrl="http://example.com?existing=true"
+        propertyName="baseCompany"
+        label="Company"
+      />
+    );
+
+    const input = getByRole("combobox");
+    fireEvent.change(input, { target: { value: "test" } });
+    fireEvent.focus(input);
+
+    await waitFor(() => {
+      expect(mockedGet).toHaveBeenCalledWith(
+        expect.objectContaining({
+          url: "http://example.com?existing=true&baseCompany=test",
+        })
+      );
+    });
+  });
+
+  test("API call adds '?' if URL does not include '?'", async () => {
+    const mockedGet = jest.fn();
+    HalApiCaller.get = mockedGet.mockResolvedValue({
+      halResource: { getItems: () => [{ summary: { baseCompany: "Test Company" } }] },
+    });
+
+    const { getByRole } = render(
+      <HalAutocomplete
+        collectionUrl="http://example.com"
+        propertyName="baseCompany"
+        label="Company"
+      />
+    );
+
+    const input = getByRole("combobox");
+    fireEvent.change(input, { target: { value: "test" } });
+    fireEvent.focus(input);
+
+    await waitFor(() => {
+      expect(mockedGet).toHaveBeenCalledWith(
+        expect.objectContaining({
+          url: "http://example.com?baseCompany=test",
+        })
+      );
+    });
+  });
 });