diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..c339b8d
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,32 @@
+import pytest
+from click.testing import CliRunner
+from src.cli import main
+
+
+@pytest.fixture
+def runner():
+    return CliRunner()
+
+
+def test_cli_help(runner):
+    result = runner.invoke(main, ['--help'])
+    assert result.exit_code == 0
+    assert 'LocalAPI Docs' in result.output
+
+
+def test_cli_serve(runner, tmp_path, sample_spec):
+    result = runner.invoke(main, ['serve', str(sample_spec)])
+    assert result.exit_code == 0
+
+
+def test_cli_generate(runner, tmp_path, sample_spec):
+    output = tmp_path / "output.html"
+    result = runner.invoke(main, ['generate', str(sample_spec), '-o', str(output)])
+    assert result.exit_code == 0
+    assert output.exists()
+
+
+def test_cli_validate(runner, sample_spec):
+    result = runner.invoke(main, ['validate', str(sample_spec)])
+    assert result.exit_code == 0
+    assert 'valid' in result.output.lower()