` tag, but the linter can't find the definition of the `iron-collapse` custom element. This probably means that there's a missing HTML import in `index.html`. To ignore this warning, add `undefined-elements` to the `ignoreWarnings` array in `polymer.json`.
+
+## polymer serve {#serve}
+
+ローカルWebサーバーを実行します。
+
+エレメントまたはアプリのライブデモを表示するには、ローカルWebサーバーを実行します:
+
+ polymer serve
+
+デモを表示するには、ブラウザで次のいずれかのURLを指定します。
+
+Element project demo:
+
+http://localhost:8080/components/my-el/demo/
+
+Element project API reference:
+
+localhost:8080/components/my-el/
+
+App project demo:
+
+ http://localhost:8080
+
+### Server options {#server-options}
+
+This section shows examples of using various `polymer serve` options.
+
+Serve from port 3000:
+
+ polymer serve --port 3000
+
+If you have configured a custom hostname on your machine, Polymer CLI can serve it with the
+`--hostname` argument (for example, app project demo is available at `http://test:8080`):
+
+ polymer serve --hostname test
+
+Open up a page other than the default `index.html` in a specific browser
+(Apple Safari, in this case):
+
+ polymer serve --open app.html --browser Safari
+
+## polymer test {#tests}
+
+Runs tests.
+
+If you want to run tests on your element or app project, `cd` to the base directory of your project
+and run:
+
+ polymer test
+
+Polymer CLI automatically runs all of the tests that it finds in the `test` directory. You'll see
+the results of the tests in your CLI.
+
+If you create your own tests, they should also go in the `test` directory.
+
+The underlying library that powers `polymer test` is called `web-component-tester` (`wct`). Learn
+more about creating unit tests with `wct`
+in [Test your elements](tests).
+
+## Global options for Polymer CLI commands {#global}
+
+You can see a list of global options by running `polymer help`. Most of them
+are self-explanatory.
+
+The following commands are currently only supported for the `polymer build`
+command, with planned support for other commands in the future.
+
+* `entry`
+* `shell`
+* `fragment`
+
+See [`polymer build`](#build) for more information on how to use these options.