diff --git a/packages/ui/components/form/timezone-select/timezone-select.test.tsx b/packages/ui/components/form/timezone-select/timezone-select.test.tsx
new file mode 100644
index 0000000000..08d343c06f
--- /dev/null
+++ b/packages/ui/components/form/timezone-select/timezone-select.test.tsx
@@ -0,0 +1,171 @@
+/* eslint-disable playwright/missing-playwright-await */
+import { render, screen, waitFor, fireEvent } from "@testing-library/react";
+import type { Props as SelectProps } from "react-timezone-select";
+import { vi } from "vitest";
+
+import { TimezoneSelect } from "./TimezoneSelect";
+
+const mockCityTimezones = [
+  { city: "City 1", timezone: "Timezone 1" },
+  { city: "City 2", timezone: "Timezone 2" },
+];
+
+const runtimeMock = async (bool: boolean) => {
+  const updatedTrcp = {
+    viewer: {
+      public: {
+        cityTimezones: {
+          useQuery() {
+            return {
+              data: mockCityTimezones,
+              isLoading: bool,
+            };
+          },
+        },
+      },
+    },
+  };
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const mockedLib = (await import("@calcom/trpc/react")) as any;
+  mockedLib.trpc = updatedTrcp;
+};
+
+const mockOptText = [
+  "America/Dawson GMT -7:00",
+  "Pacific/Midway GMT -11:00",
+  "Pacific/Honolulu GMT -10:00",
+  "America/Juneau GMT -8:00",
+];
+
+const MockTimezText = ["America/Dawson", "Pacific/Midway", "Pacific/Honolulu", "America/Juneau"];
+
+const classNames = {
+  singleValue: () => "test1",
+  valueContainer: () => "test2",
+  control: () => "test3",
+  input: () => "test4",
+  option: () => "test5",
+  menuList: () => "test6",
+  menu: () => "test7",
+  multiValue: () => "test8",
+};
+
+const onChangeMock = vi.fn();
+
+const renderSelect = (newProps: SelectProps & { variant?: "default" | "minimal" }) => {
+  render(
+    <form aria-label="test-form">
+      <label htmlFor="test">Test</label>
+      <TimezoneSelect {...newProps} inputId="test" />
+    </form>
+  );
+};
+
+const openMenu = async () => {
+  await waitFor(async () => {
+    const element = screen.getByLabelText("Test");
+    element.focus();
+    fireEvent.keyDown(element, { key: "ArrowDown", code: "ArrowDown" });
+    screen.getByText(mockOptText[0]);
+  });
+};
+
+describe("Test TimezoneSelect", () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+    vi.resetAllMocks();
+  });
+
+  describe("Test TimezoneSelect with isLoading = false in mock", () => {
+    beforeAll(async () => {
+      await runtimeMock(false);
+    });
+    test("Should render with the correct CSS when has classNames prop", async () => {
+      renderSelect({ value: MockTimezText[0], classNames });
+      openMenu();
+
+      const dawsonEl = screen.getByText(MockTimezText[0]);
+
+      expect(dawsonEl).toBeInTheDocument();
+
+      const singleValueEl = dawsonEl.parentElement;
+      const valueContainerEl = singleValueEl?.parentElement;
+      const controlEl = valueContainerEl?.parentElement;
+      const inputEl = screen.getByRole("combobox", { hidden: true }).parentElement;
+      const optionEl = screen.getByText(mockOptText[0]).parentElement?.parentElement;
+      const menuListEl = optionEl?.parentElement;
+      const menuEl = menuListEl?.parentElement;
+
+      expect(singleValueEl).toHaveClass(classNames.singleValue());
+      expect(valueContainerEl).toHaveClass(classNames.valueContainer());
+      expect(controlEl).toHaveClass(classNames.control());
+      expect(inputEl).toHaveClass(classNames.input());
+      expect(optionEl).toHaveClass(classNames.option());
+      expect(menuListEl).toHaveClass(classNames.menuList());
+      expect(menuEl).toHaveClass(classNames.menu());
+
+      for (const mockText of mockOptText) {
+        expect(screen.getByText(mockText)).toBeInTheDocument();
+      }
+    });
+
+    test("Should render with the correct CSS when has className prop", async () => {
+      renderSelect({ value: MockTimezText[0], className: "test-css" });
+      openMenu();
+      const labelTest = screen.getByText("Test");
+      const timezoneEl = labelTest.nextSibling;
+      expect(timezoneEl).toHaveClass("test-css");
+    });
+
+    test("Should render with the correct CSS when has prop isMulti", async () => {
+      renderSelect({ value: MockTimezText[0], isMulti: true, classNames });
+      openMenu();
+
+      const dawsonEl = screen.getByText(MockTimezText[0]);
+      const multiValueEl = dawsonEl.parentElement?.parentElement;
+      expect(multiValueEl).toHaveClass(classNames.multiValue());
+
+      const inputEl = screen.getByRole("combobox", { hidden: true }).parentElement;
+      const menuIsOpenEl = inputEl?.parentElement?.nextSibling;
+      expect(menuIsOpenEl).toHaveClass("[&>*:last-child]:rotate-180 [&>*:last-child]:transition-transform ");
+    });
+
+    test("Should render with the correct CSS when menu is open and onChange be called", async () => {
+      renderSelect({ value: MockTimezText[0], onChange: onChangeMock });
+      await waitFor(async () => {
+        const element = screen.getByLabelText("Test");
+        element.focus();
+        fireEvent.keyDown(element, { key: "ArrowDown", code: "ArrowDown" });
+        screen.getByText(mockOptText[3]);
+
+        const inputEl = screen.getByRole("combobox", { hidden: true }).parentElement;
+        const menuIsOpenEl = inputEl?.parentElement?.nextSibling;
+        expect(menuIsOpenEl).toHaveClass("rotate-180 transition-transform ");
+        const opt = screen.getByText(mockOptText[3]);
+        fireEvent.click(opt);
+        fireEvent.keyDown(element, { key: "ArrowDown", code: "ArrowDown" });
+      });
+
+      expect(onChangeMock).toBeCalled();
+    });
+  });
+
+  describe("Test TimezoneSelect with isLoading = true in mock", () => {
+    beforeAll(async () => {
+      await runtimeMock(true);
+    });
+    test("Should have no options when isLoading is true", async () => {
+      renderSelect({ value: MockTimezText[0] });
+      await waitFor(async () => {
+        const element = screen.getByLabelText("Test");
+        element.focus();
+        fireEvent.keyDown(element, { key: "ArrowDown", code: "ArrowDown" });
+      });
+
+      for (const mockText of mockOptText) {
+        const optionEl = screen.queryByText(mockText);
+        expect(optionEl).toBeNull();
+      }
+    });
+  });
+});