diff --git a/types/highcharts/test/index.ts b/types/highcharts/test/index.ts
index 8652ad7ec0..a004778ed9 100644
--- a/types/highcharts/test/index.ts
+++ b/types/highcharts/test/index.ts
@@ -2516,7 +2516,7 @@ function test_NumericSymbolMagnitude() {
         }]
     });
 
-    chart.update(<Highcharts.ChartOptions> {
+    chart.update({
         lang: {
             numericSymbols: ['万', '億'],
             numericSymbolMagnitude: 10000