diff --git a/tests/phpunit/test-cli.php b/tests/phpunit/test-cli.php
index 43e6de7..42f7392 100644
--- a/tests/phpunit/test-cli.php
+++ b/tests/phpunit/test-cli.php
@@ -39,7 +39,7 @@ public function testMigratePostTypePost() : void {
 		$command = new CLI\Migrate_Command;
 		$command->wp_authors( [], [
 			'dry-run' => false,
-			'post_type' => 'post', // Note, have to set default values manually.
+			'post-type' => 'post', // Note, have to set default values manually.
 		] );
 
 		// Check migration command has correctly set the author.