diff --git a/jqueryui/jqueryui-tests.ts b/jqueryui/jqueryui-tests.ts
index 79263027f..ef02b40d6 100644
--- a/jqueryui/jqueryui-tests.ts
+++ b/jqueryui/jqueryui-tests.ts
@@ -1618,7 +1618,7 @@ function test_spinner() {
         },
         _parse: function (value) {
             if (typeof value === "string") {
-                if (Number(value) == value) {
+                if (Number(value) == <any>value) {
                     return Number(value);
                 }
                 return 123;
@@ -1822,4 +1822,4 @@ function test_widget() {
     var isDisabled = $(".selector").jQuery.Widget("option", "disabled");
     $(".selector").jQuery.Widget("option", "disabled", true);
     $(".selector").jQuery.Widget("option", { disabled: true });
-}
\ No newline at end of file
+}