diff --git a/test/configCases/externals/global/index.js b/test/configCases/externals/global/index.js
index f76fe086797..821f2376eb2 100644
--- a/test/configCases/externals/global/index.js
+++ b/test/configCases/externals/global/index.js
@@ -1,5 +1,6 @@
-afterEach(() => {
+afterEach(done => {
 	delete global.EXTERNAL_TEST_GLOBAL;
+	done();
 });
 
 it("should move externals in chunks into entry chunk", function() {