diff --git a/src/button/Button.test.tsx b/src/button/Button.test.tsx
new file mode 100644
index 00000000..c4a03406
--- /dev/null
+++ b/src/button/Button.test.tsx
@@ -0,0 +1,113 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { describe, expect, test, vi } from "vitest";
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { TooltipProvider } from "@vector-im/compound-web";
+
+import { MicButton, VideoButton } from "./Button";
+
+describe("MicButton", () => {
+  test("calls onClick when not busy", async () => {
+    const user = userEvent.setup();
+    const onClick = vi.fn();
+    render(
+      <TooltipProvider>
+        <MicButton enabled={true} onClick={onClick} />
+      </TooltipProvider>,
+    );
+
+    const button = screen.getByRole("switch");
+    await user.click(button);
+
+    expect(onClick).toHaveBeenCalled();
+  });
+
+  test("does not call onClick when busy", async () => {
+    const user = userEvent.setup();
+    const onClick = vi.fn();
+    render(
+      <TooltipProvider>
+        <MicButton enabled={true} busy={true} onClick={onClick} />
+      </TooltipProvider>,
+    );
+
+    const button = screen.getByRole("switch");
+    expect(button).toHaveAttribute("aria-disabled", "true");
+    expect(button).toHaveAttribute("aria-busy", "true");
+
+    await user.click(button);
+    expect(onClick).not.toHaveBeenCalled();
+  });
+
+  test("does not call onClick when disabled", async () => {
+    const user = userEvent.setup();
+    const onClick = vi.fn();
+    render(
+      <TooltipProvider>
+        <MicButton enabled={true} disabled={true} onClick={onClick} />
+      </TooltipProvider>,
+    );
+
+    const button = screen.getByRole("switch");
+    expect(button).toHaveAttribute("aria-disabled", "true");
+
+    await user.click(button);
+    expect(onClick).not.toHaveBeenCalled();
+  });
+});
+
+describe("VideoButton", () => {
+  test("calls onClick when not busy", async () => {
+    const user = userEvent.setup();
+    const onClick = vi.fn();
+    render(
+      <TooltipProvider>
+        <VideoButton enabled={true} onClick={onClick} />
+      </TooltipProvider>,
+    );
+
+    const button = screen.getByRole("switch");
+    await user.click(button);
+
+    expect(onClick).toHaveBeenCalled();
+  });
+
+  test("does not call onClick when busy", async () => {
+    const user = userEvent.setup();
+    const onClick = vi.fn();
+    render(
+      <TooltipProvider>
+        <VideoButton enabled={true} busy={true} onClick={onClick} />
+      </TooltipProvider>,
+    );
+
+    const button = screen.getByRole("switch");
+    expect(button).toHaveAttribute("aria-disabled", "true");
+    expect(button).toHaveAttribute("aria-busy", "true");
+
+    await user.click(button);
+    expect(onClick).not.toHaveBeenCalled();
+  });
+
+  test("does not call onClick when disabled", async () => {
+    const user = userEvent.setup();
+    const onClick = vi.fn();
+    render(
+      <TooltipProvider>
+        <VideoButton enabled={true} disabled={true} onClick={onClick} />
+      </TooltipProvider>,
+    );
+
+    const button = screen.getByRole("switch");
+    expect(button).toHaveAttribute("aria-disabled", "true");
+
+    await user.click(button);
+    expect(onClick).not.toHaveBeenCalled();
+  });
+});