diff --git a/test/split_way_multipolygon.test.js b/test/split_way_multipolygon.test.js
index 3974458..b133f72 100644
--- a/test/split_way_multipolygon.test.js
+++ b/test/split_way_multipolygon.test.js
@@ -62,7 +62,7 @@ test('Test Simple Multipolygon', () => {
 
 window.printError = printError;
 
-const errors = [];
+var errors = [];
 
 function printError(txt) {
   errors.push[txt];