diff --git a/test/configCases/plugins/define-plugin/index.js b/test/configCases/plugins/define-plugin/index.js
index ac3964e9a90..6e18cbb7432 100644
--- a/test/configCases/plugins/define-plugin/index.js
+++ b/test/configCases/plugins/define-plugin/index.js
@@ -118,3 +118,10 @@ it("should follow renamings in var (issue 5215)", function() {
 it("should check that runtimeValue callback argument is a module", function() {
 	expect(RUNTIMEVALUE_CALLBACK_ARGUMENT_IS_A_MODULE).toEqual(true);
 });
+
+it("should expand properly", function() {
+	var tmp = '';
+	expect(function() {
+		require('./' + A_DOT_J + tmp + 's');
+	}).not.toThrowError(ReferenceError, "A_DOT_J is not defined");
+});
diff --git a/test/configCases/plugins/define-plugin/webpack.config.js b/test/configCases/plugins/define-plugin/webpack.config.js
index abf094601d7..60842944ec2 100644
--- a/test/configCases/plugins/define-plugin/webpack.config.js
+++ b/test/configCases/plugins/define-plugin/webpack.config.js
@@ -32,7 +32,8 @@ module.exports = {
 				function({ module }) {
 					return module instanceof Module;
 				}
-			)
+			),
+			A_DOT_J: '"a.j"'
 		})
 	]
 };