diff --git a/assert/assert.go b/assert/assert.go
index 663e51f..c2335bb 100644
--- a/assert/assert.go
+++ b/assert/assert.go
@@ -20,6 +20,13 @@ func Equal(t TestingT, expected interface{}, actual interface{}, msg ...string)
 	return
 }
 
+func IsNotNil(t TestingT, actual interface{}, msg ...string) {
+	if isNil(actual) {
+		t.Errorf("%s expected not nil, but actual=%+v", msg, actual)
+	}
+	return
+}
+
 func isNil(actual interface{}) bool {
 	if actual == nil {
 		return true
diff --git a/assert/assert_test.go b/assert/assert_test.go
index 56364c6..2624582 100644
--- a/assert/assert_test.go
+++ b/assert/assert_test.go
@@ -15,6 +15,7 @@ func (mtt MockTestingT) Errorf(format string, args ...interface{}) {
 	fmt.Errorf(format, args...)
 }
 func TestEqual(t *testing.T) {
+	// 测试Equal
 	Equal(t, nil, nil)
 	Equal(t, nil, nil, "fxxk.")
 	Equal(t, 1, 1)
@@ -30,12 +31,23 @@ func TestEqual(t *testing.T) {
 	var b []byte
 	Equal(t, nil, b)
 
+	// 测试isNil
 	Equal(t, true, isNil(nil))
 	Equal(t, false, isNil("aaa"))
+	// 测试equal
 	Equal(t, false, equal([]byte{}, "aaa"))
 	Equal(t, true, equal([]byte{}, []byte{}))
 	Equal(t, true, equal([]byte{0, 1, 2}, []byte{0, 1, 2}))
 
+	// 测试Equal失败
 	var mtt MockTestingT
 	Equal(mtt, false, isNil(nil))
 }
+
+func TestIsNotNil(t *testing.T) {
+	IsNotNil(t, 1)
+
+	// 测试IsNotNil失败
+	var mtt MockTestingT
+	IsNotNil(mtt, nil)
+}