diff --git a/test/JavaScriptObfuscator.spec.ts b/test/JavaScriptObfuscator.spec.ts
index bda5665e..27e6bd9b 100644
--- a/test/JavaScriptObfuscator.spec.ts
+++ b/test/JavaScriptObfuscator.spec.ts
@@ -23,7 +23,7 @@ describe('JavaScriptObfuscator', () => {
                     `(function () {var test = 1;})()`,
                     Object.assign({}, DEFAULT_PRESET, NO_CUSTOM_NODES_PRESET)
                 ),
-                /^\(function *\( *\) *\{ *var *_0x[\w]+ *= *0x\d+; *\} *(\( *\) *\)|\) *\( *\));?$/
+                /^\(function *\(\) *\{ *var *_0x[\w]+ *= *0x\d+; *\}(\(\)\)|\)\(\));?$/
             );
         });
     });