diff --git a/src/config.spec.ts b/src/config.spec.ts
index 58b8cd045b3bac9c81018c8ae4c9e6238463e163..db041ea6796da5d92ae14c0274ce7a7365c5daa0 100644
--- a/src/config.spec.ts
+++ b/src/config.spec.ts
@@ -80,3 +80,10 @@ test('isDocker', t => {
   }
 
 })
+
+/**
+ * issue #70 https://github.com/wechaty/wechaty/issues/70#issuecomment-258676376
+ */
+test('Module Singleton', t => {
+  t.is(global['WECHATY_CONFIG_INSTANCE_COUNTER'], 1, 'should only load module for one time')
+})
diff --git a/src/config.ts b/src/config.ts
index e24c495c2fc197b5cd951c4143049356e86e7fba..f87e738ff70356cc18cdfae4bac01a5a9ba7d3ee 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -199,4 +199,12 @@ export interface Sleepable {
  */
 process.env['SELENIUM_PROMISE_MANAGER'] = 0
 
+/**
+ * to count how many times this piece of code is instanciaed
+ */
+if (!global['WECHATY_CONFIG_INSTANCE_COUNTER']) {
+  global['WECHATY_CONFIG_INSTANCE_COUNTER'] = 0
+}
+global['WECHATY_CONFIG_INSTANCE_COUNTER']++
+
 export { log }