diff --git a/src/wp-includes/class-wp-theme.php b/src/wp-includes/class-wp-theme.php
index 7c25d07b2c7b7..ee74099766160 100644
--- a/src/wp-includes/class-wp-theme.php
+++ b/src/wp-includes/class-wp-theme.php
@@ -1576,11 +1576,6 @@ public function is_allowed( $check = 'both', $blog_id = null ) {
 	 * @return bool
 	 */
 	public function is_block_theme() {
-		if ( ! did_action( 'setup_theme' ) ) {
-			_doing_it_wrong( __METHOD__, __( 'This method should not be called before themes are set up.' ), '6.8.0' );
-			return false;
-		}
-
 		if ( isset( $this->block_theme ) ) {
 			return $this->block_theme;
 		}