diff --git a/src/components/__tests__/add-command.test.ts b/src/components/__tests__/add-command.test.ts
new file mode 100644
index 0000000..cea5e30
--- /dev/null
+++ b/src/components/__tests__/add-command.test.ts
@@ -0,0 +1,48 @@
+import { spawnSync } from "child_process";
+import {
+  afterEach,
+  beforeEach,
+  describe,
+  expect,
+  it,
+  jest,
+} from "@jest/globals";
+import { createAddCommand } from "../commands/add";
+
+jest.mock("child_process", () => ({
+  spawnSync: jest.fn(),
+}));
+
+describe("components add command", () => {
+  const mockedSpawnSync = spawnSync as unknown as jest.Mock;
+  let logSpy: jest.SpiedFunction<typeof console.log>;
+
+  beforeEach(() => {
+    mockedSpawnSync.mockReset();
+    mockedSpawnSync.mockReturnValue({ status: 0 });
+    logSpy = jest.spyOn(console, "log").mockImplementation(() => {});
+  });
+
+  afterEach(() => {
+    logSpy.mockRestore();
+  });
+
+  it("checks npx availability through the shell for Windows command resolution", async () => {
+    const command = createAddCommand();
+
+    await command.parseAsync(["bar-visualizer"], { from: "user" });
+
+    expect(mockedSpawnSync).toHaveBeenNthCalledWith(1, "npx", ["--version"], {
+      encoding: "utf-8",
+      shell: true,
+    });
+    expect(mockedSpawnSync).toHaveBeenNthCalledWith(
+      2,
+      "npx -y shadcn@latest add https://ui.elevenlabs.io/r/bar-visualizer.json",
+      {
+        stdio: "inherit",
+        shell: true,
+      }
+    );
+  });
+});
diff --git a/src/components/commands/add.ts b/src/components/commands/add.ts
index 4ccf83d..f6f3443 100644
--- a/src/components/commands/add.ts
+++ b/src/components/commands/add.ts
@@ -8,8 +8,8 @@ export function createAddCommand(): Command {
     .argument('[name]', 'Name of the component to add (optional)')
     .action(async (componentName?: string) => {
       try {
-        // Check if npx is available
-        const npxCheck = spawnSync('npx', ['--version'], { encoding: 'utf-8' });
+        // Check if npx is available. shell:true lets Windows resolve npx.cmd/npx.ps1.
+        const npxCheck = spawnSync('npx', ['--version'], { encoding: 'utf-8', shell: true });
         if (npxCheck.error) {
           console.error('Error: npx is not available. Please install Node.js/npm.');
           process.exit(1);