diff --git a/test/vlogFast.js b/script/test/vlogFast.js
similarity index 63%
rename from test/vlogFast.js
rename to script/test/vlogFast.js
index 8c53606..fbb6a76 100644
--- a/test/vlogFast.js
+++ b/script/test/vlogFast.js
@@ -1,8 +1,8 @@
-const { vlogFast } = require('../resources/hdlParser');
+const { vlogFast } = require('../../resources/hdlParser');
 
 const testFile = 'c:/Users/11934/Project/Digital-IDE/Digital-Test/Verilog/dependence_test/parent.v';
 
 (async () => {
-    const fast = vlogFast(testFile);
+    const fast = await vlogFast(testFile);
     console.log(JSON.stringify(fast, null, '  '));
 })();
\ No newline at end of file
diff --git a/src/hdlParser/util.ts b/src/hdlParser/util.ts
index 95a701d..8880ae9 100644
--- a/src/hdlParser/util.ts
+++ b/src/hdlParser/util.ts
@@ -4,23 +4,23 @@ import { HdlLangID } from '../global/enum';
 import { AbsPath } from '../global';
 
 namespace HdlSymbol {
-    export async function fast(path: AbsPath): Promise<Fast | undefined> {
+    export function fast(path: AbsPath): Promise<Fast | undefined> {
         const langID = hdlFile.getLanguageId(path);
         switch (langID) {
             case HdlLangID.Verilog: return vlogFast(path);
             case HdlLangID.Vhdl: return vhdlFast(path);
             case HdlLangID.SystemVerilog: return svFast(path);
-            default: return undefined;
+            default: return new Promise(resolve => resolve(undefined));
         }
     }
 
-    export async function all(path: AbsPath): Promise<All | undefined> {
+    export function all(path: AbsPath): Promise<All | undefined> {
         const langID = hdlFile.getLanguageId(path);
         switch (langID) {
             case HdlLangID.Verilog: return vlogAll(path);
             case HdlLangID.Vhdl: return vhdlAll(path);
             case HdlLangID.SystemVerilog: return svAll(path);
-            default: return undefined;
+            default: return new Promise(resolve => resolve(undefined));
         }
     }
 }