diff --git a/features/roles.feature b/features/roles.feature
index 53ac7046ab..c4df0c9075 100644
--- a/features/roles.feature
+++ b/features/roles.feature
@@ -81,3 +81,9 @@ Feature: Manage WordPress roles
       delete_posts
       delete_published_posts
       """
+
+    When I run `wp cap list reporter --format=count`
+    Then STDOUT should be:
+      """
+      10
+      """
diff --git a/php/commands/cap.php b/php/commands/cap.php
index f5f99d55a8..0663f248e4 100644
--- a/php/commands/cap.php
+++ b/php/commands/cap.php
@@ -19,6 +19,10 @@
  */
 class Capabilities_Command extends WP_CLI_Command {
 
+	private $fields = array(
+		'name'
+	);
+
 	/**
 	 * List capabilities for a given role.
 	 *
@@ -27,6 +31,19 @@ class Capabilities_Command extends WP_CLI_Command {
 	 * <role>
 	 * : Key for the role.
 	 *
+	 * [--format=<format>]
+	 * : Render output in a particular format.
+	 * ---
+	 * default: list
+	 * options:
+	 *   - list
+	 *   - table
+	 *   - csv
+	 *   - json
+	 *   - count
+	 *   - yaml
+	 * ---
+	 *
 	 * ## EXAMPLES
 	 *
 	 *     # Display alphabetical list of Contributor capabilities
@@ -39,11 +56,26 @@ class Capabilities_Command extends WP_CLI_Command {
 	 *
 	 * @subcommand list
 	 */
-	public function list_( $args ) {
+	public function list_( $args, $assoc_args ) {
 		$role_obj = self::get_role( $args[0] );
 
-		foreach ( array_keys( $role_obj->capabilities ) as $cap )
-			WP_CLI::line( $cap );
+		if ( 'list' === $assoc_args['format'] ) {
+			foreach ( array_keys( $role_obj->capabilities ) as $cap ) {
+				WP_CLI::line( $cap );
+			}
+		}
+		else {
+			$output_caps = array();
+			foreach ( array_keys( $role_obj->capabilities ) as $cap ) {
+				$output_cap = new stdClass;
+
+				$output_cap->name = $cap;
+
+				$output_caps[] = $output_cap;
+			}
+			$formatter = new \WP_CLI\Formatter( $assoc_args, $this->fields );
+			$formatter->display_items( $output_caps );
+		}
 	}
 
 	/**