diff --git a/wp-admin/includes/theme.php b/wp-admin/includes/theme.php
index d5c6a549eb..1e4828b3c1 100644
--- a/wp-admin/includes/theme.php
+++ b/wp-admin/includes/theme.php
@@ -782,7 +782,7 @@ function wp_prepare_themes_for_js( $themes = null ) {
 					? wp_nonce_url( admin_url( 'themes.php?action=' . $auto_update_action . '&stylesheet=' . $encoded_slug ), 'updates' )
 					: null,
 			),
-			'block_theme'    => $theme->is_block_theme(),
+			'blockTheme'     => $theme->is_block_theme(),
 		);
 	}
 
diff --git a/wp-admin/themes.php b/wp-admin/themes.php
index 3ef411bb6c..47aa7742b9 100644
--- a/wp-admin/themes.php
+++ b/wp-admin/themes.php
@@ -900,7 +900,7 @@ function wp_theme_auto_update_setting_template() {
 					$aria_label = sprintf( _x( 'Activate %s', 'theme' ), '{{ data.name }}' );
 					?>
 					<a class="button activate" href="{{{ data.actions.activate }}}" aria-label="<?php echo esc_attr( $aria_label ); ?>"><?php _e( 'Activate' ); ?></a>
-					<# if ( ! data.block_theme ) { #>
+					<# if ( ! data.blockTheme ) { #>
 						<?php
 						/* translators: %s: Theme name. */
 						$live_preview_aria_label = sprintf( _x( 'Live Preview %s', 'theme' ), '{{ data.name }}' );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0a33add1bc..59e6375c80 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-beta2-52345';
+$wp_version = '5.9-beta2-52346';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.