diff --git a/__tests__/commands/cli.test.ts b/__tests__/commands/cli.test.ts
new file mode 100644
index 0000000..5817a20
--- /dev/null
+++ b/__tests__/commands/cli.test.ts
@@ -0,0 +1,20 @@
+import { execFile } from 'node:child_process';
+import { fileURLToPath } from 'node:url';
+import { promisify } from 'node:util';
+
+const run = promisify(execFile);
+const projectRoot = fileURLToPath(new URL('../../', import.meta.url));
+
+describe('when opting out of telemetry from the CLI', () => {
+  it.each([
+    ['help', '--no-telemetry'],
+    ['--no-telemetry', 'help'],
+  ])('accepts %j %j without an argument error', async (...args) => {
+    const sut = await run(process.execPath, ['--import', 'tsx', 'bin/cli.ts', ...args], {
+      cwd: projectRoot,
+    });
+
+    expect(sut.stdout).toContain('Usage:');
+    expect(sut.stderr).not.toContain('Unknown argument');
+  });
+});
diff --git a/__tests__/commands/default.test.ts b/__tests__/commands/default.test.ts
new file mode 100644
index 0000000..2e095ec
--- /dev/null
+++ b/__tests__/commands/default.test.ts
@@ -0,0 +1,45 @@
+import { defaultCommand } from '@commands/default.js';
+import { isTelemetryEnabled, resetTelemetry } from '@lib/telemetry.js';
+
+// Keep the real command and telemetry initialization, without opening a terminal UI.
+vi.mock('ink', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('ink')>();
+  return {
+    ...actual,
+    render: () => ({ waitUntilExit: () => Promise.resolve() }),
+  };
+});
+
+afterEach(() => {
+  vi.unstubAllEnvs();
+  resetTelemetry();
+});
+
+describe('when starting the wizard', () => {
+  it('honors the telemetry opt-out even when enabled by the environment', async () => {
+    vi.stubEnv('CONFIDENCE_TELEMETRY', 'true');
+    const sut = defaultCommand;
+
+    await sut.handler({ telemetry: false } as never);
+
+    expect(isTelemetryEnabled()).toBe(false);
+  });
+
+  it('preserves the environment opt-out with the default CLI value', async () => {
+    vi.stubEnv('CONFIDENCE_TELEMETRY', 'false');
+    const sut = defaultCommand;
+
+    await sut.handler({ telemetry: true } as never);
+
+    expect(isTelemetryEnabled()).toBe(false);
+  });
+
+  it('preserves enabled telemetry when no opt-out is requested', async () => {
+    vi.stubEnv('CONFIDENCE_TELEMETRY', 'true');
+    const sut = defaultCommand;
+
+    await sut.handler({ telemetry: true } as never);
+
+    expect(isTelemetryEnabled()).toBe(true);
+  });
+});
diff --git a/bin/cli.ts b/bin/cli.ts
index 90e38b6..b7de217 100644
--- a/bin/cli.ts
+++ b/bin/cli.ts
@@ -23,10 +23,10 @@ const cli = yargs(hideBin(process.argv))
     describe: 'Project directory to run the wizard in',
     normalize: true,
   })
-  .option('no-telemetry', {
+  .option('telemetry', {
     type: 'boolean',
-    default: false,
-    describe: 'Disable anonymous usage telemetry',
+    default: true,
+    describe: 'Collect anonymous usage telemetry (disable with --no-telemetry)',
   })
   .command(defaultCommand.name, defaultCommand.description, () => {}, defaultCommand.handler)
   .command('start', defaultCommand.description, () => {}, defaultCommand.handler)
diff --git a/src/commands/default.ts b/src/commands/default.ts
index 4c3db6a..7bbe01f 100644
--- a/src/commands/default.ts
+++ b/src/commands/default.ts
@@ -9,7 +9,7 @@ export const defaultCommand: Command = {
     const dryRun = Boolean(args['dry-run'] ?? args.dryRun);
     const debug = Boolean(args.debug);
     const dir = args.dir as string | undefined;
-    const noTelemetry = Boolean(args['no-telemetry'] ?? args.noTelemetry);
+    const noTelemetry = args.telemetry === false;
 
     if (noTelemetry) {
       process.env.CONFIDENCE_TELEMETRY = 'false';