diff --git a/src/wp-includes/theme.php b/src/wp-includes/theme.php
index 237a4d3e14..7faf3844e8 100644
--- a/src/wp-includes/theme.php
+++ b/src/wp-includes/theme.php
@@ -2481,7 +2481,7 @@ function get_theme_starter_content() {
  *              by adding it to the function signature.
  * @since 5.5.0 The `core-block-patterns` feature was added and is enabled by default.
  * @since 5.5.0 The `custom-logo` feature now also accepts 'unlink-homepage-logo'.
- * @since 5.6.0 The `post-formats` feature now returns doing it wrong if no array is passed
+ * @since 5.6.0 The `post-formats` feature warns if no array is passed.
  *
  * @global array $_wp_theme_features
  *
diff --git a/tests/phpunit/tests/post/formats.php b/tests/phpunit/tests/post/formats.php
index 7c49fb03b5..44cedfc9a6 100644
--- a/tests/phpunit/tests/post/formats.php
+++ b/tests/phpunit/tests/post/formats.php
@@ -8,16 +8,6 @@ class Tests_Post_Formats extends WP_UnitTestCase {
 		parent::setUp();
 	}
 
-	/**
-	 * @ticket 51390
-	 */
-	function test_post_format_doing_it_wrong() {
-		$this->setExpectedIncorrectUsage( "add_theme_support( 'post-formats' )" );
-
-		// The second parameter should be an array.
-		$this->assertFalse( add_theme_support( 'post-formats' ) );
-	}
-
 	function test_set_get_post_format_for_post() {
 		$post_id = self::factory()->post->create();
 
diff --git a/tests/phpunit/tests/theme/support.php b/tests/phpunit/tests/theme/support.php
index 25100c46ac..e258f87281 100644
--- a/tests/phpunit/tests/theme/support.php
+++ b/tests/phpunit/tests/theme/support.php
@@ -132,6 +132,16 @@ class Tests_Theme_Support extends WP_UnitTestCase {
 		$this->assertFalse( current_theme_supports( 'html5' ) );
 	}
 
+	/**
+	 * @ticket 51390
+	 *
+	 * @expectedIncorrectUsage add_theme_support( 'post-formats' )
+	 */
+	function test_supports_post_formats_doing_it_wrong() {
+		// The second parameter should be an array.
+		$this->assertFalse( add_theme_support( 'post-formats' ) );
+	}
+
 	function supports_foobar( $yesno, $args, $feature ) {
 		if ( $args[0] === $feature[0] ) {
 			return true;