diff --git a/src/js/_enqueues/wp/updates.js b/src/js/_enqueues/wp/updates.js
index 94cc13024f..a7c2d8e060 100644
--- a/src/js/_enqueues/wp/updates.js
+++ b/src/js/_enqueues/wp/updates.js
@@ -520,7 +520,7 @@
 				} ) );
 
 			$card.find( '.update-now' )
-				.text(  __( 'Update Failed!' ) )
+				.text(  __( 'Update failed' ) )
 				.removeClass( 'updating-message' );
 
 			if ( response.pluginName ) {
@@ -1838,7 +1838,7 @@
 			.removeClass( 'updating-message' )
 			.removeAttr( 'aria-label' )
 			.prop( 'disabled', true )
-			.text( __( 'Update Failed!' ) );
+			.text( __( 'Update failed' ) );
 
 		$( '.updating-message:not(.button):not(.thickbox)' )
 			.removeClass( 'updating-message notice-warning' )
diff --git a/src/wp-admin/includes/ajax-actions.php b/src/wp-admin/includes/ajax-actions.php
index d47d0c9d15..03a8036e37 100644
--- a/src/wp-admin/includes/ajax-actions.php
+++ b/src/wp-admin/includes/ajax-actions.php
@@ -4210,7 +4210,7 @@ function wp_ajax_update_theme() {
 	}
 
 	// An unhandled error occurred.
-	$status['errorMessage'] = __( 'Update failed.' );
+	$status['errorMessage'] = __( 'Update failed' );
 	wp_send_json_error( $status );
 }