diff --git a/features/post.feature b/features/post.feature
index d9e5e07933..b503ccee37 100644
--- a/features/post.feature
+++ b/features/post.feature
@@ -100,7 +100,7 @@ Feature: Manage WordPress posts
       """
       This is some bunkum.
       """
-    
+
     When I run `wp post url 1 {POST_ID}`
     Then STDOUT should be:
       """
@@ -176,6 +176,12 @@ Feature: Manage WordPress posts
       | Publish post | publish-post | publish      |
       | Draft post   |              | draft        |
 
+    When I run `wp post list --post_type='post' --fields="title, name, status" --format=csv`
+    Then STDOUT should be CSV containing:
+      | post_title   | post_name    | post_status  |
+      | Publish post | publish-post | publish      |
+      | Draft post   |              | draft        |
+
     When I run `wp post list --post__in={POST_ID} --format=count`
     Then STDOUT should be:
       """
diff --git a/php/WP_CLI/Formatter.php b/php/WP_CLI/Formatter.php
index 87f81c8bb5..0b04ec5e81 100644
--- a/php/WP_CLI/Formatter.php
+++ b/php/WP_CLI/Formatter.php
@@ -40,6 +40,8 @@ public function __construct( &$assoc_args, $fields = null, $prefix = false ) {
 			$format_args['fields'] = explode( ',', $format_args['fields'] );
 		}
 
+		$format_args['fields'] = array_map( 'trim', $format_args['fields'] );
+
 		$this->args = $format_args;
 		$this->prefix = $prefix;
 	}