diff --git a/src/main/java/com/xceder/demoSpec.js b/src/main/java/com/xceder/demoSpec.js
index 38ca14f..d48ec2a 100644
--- a/src/main/java/com/xceder/demoSpec.js
+++ b/src/main/java/com/xceder/demoSpec.js
@@ -1,6 +1,6 @@
 
 describe('减法函数的测试', function() {
   it('8 - 4 应该等于 4', function() {
-    expect(test(8, 4)).to.be.equal(4);
+    expect(test(8, 3)).to.be.equal(4);
   });
 });