diff --git a/gop.mod b/gop.mod
index e20a7a1..f37d009 100644
--- a/gop.mod
+++ b/gop.mod
@@ -4,3 +4,6 @@ project _yap.gox App github.com/goplus/yap
 
 project _yunit.gox App github.com/goplus/yap/ytest
 class _yunit.gox Case
+
+project _ytest.gox App github.com/goplus/yap/ytest
+class _ytest.gox Case
diff --git a/ytest/case.go b/ytest/case.go
index 7b4ffb6..7d0c349 100644
--- a/ytest/case.go
+++ b/ytest/case.go
@@ -18,12 +18,133 @@ package ytest
 
 import (
 	"net/http"
+	"testing"
+	"time"
 )
 
+// -----------------------------------------------------------------------------
+
+type caseT interface {
+	// Name returns the name of the running (sub-) test or benchmark.
+	//
+	// The name will include the name of the test along with the names of
+	// any nested sub-tests. If two sibling sub-tests have the same name,
+	// Name will append a suffix to guarantee the returned name is unique.
+	Name() string
+
+	// Fail marks the function as having failed but continues execution.
+	Fail()
+
+	// Failed reports whether the function has failed.
+	Failed() bool
+
+	// FailNow marks the function as having failed and stops its execution
+	// by calling runtime.Goexit (which then runs all deferred calls in the
+	// current goroutine).
+	// Execution will continue at the next test or benchmark.
+	// FailNow must be called from the goroutine running the
+	// test or benchmark function, not from other goroutines
+	// created during the test. Calling FailNow does not stop
+	// those other goroutines.
+	FailNow()
+
+	// Log formats its arguments using default formatting, analogous to Println,
+	// and records the text in the error log. For tests, the text will be printed only if
+	// the test fails or the -test.v flag is set. For benchmarks, the text is always
+	// printed to avoid having performance depend on the value of the -test.v flag.
+	Log(args ...any)
+
+	// Logf formats its arguments according to the format, analogous to Printf, and
+	// records the text in the error log. A final newline is added if not provided. For
+	// tests, the text will be printed only if the test fails or the -test.v flag is
+	// set. For benchmarks, the text is always printed to avoid having performance
+	// depend on the value of the -test.v flag.
+	Logf(format string, args ...any)
+
+	// Errorln is equivalent to Log followed by Fail.
+	Errorln(args ...any)
+
+	// Errorf is equivalent to Logf followed by Fail.
+	Errorf(format string, args ...any)
+
+	// Fatal is equivalent to Log followed by FailNow.
+	Fatal(args ...any)
+
+	// Fatalf is equivalent to Logf followed by FailNow.
+	Fatalf(format string, args ...any)
+
+	// Skip is equivalent to Log followed by SkipNow.
+	Skip(args ...any)
+
+	// Skipf is equivalent to Logf followed by SkipNow.
+	Skipf(format string, args ...any)
+
+	// SkipNow marks the test as having been skipped and stops its execution
+	// by calling runtime.Goexit.
+	// If a test fails (see Error, Errorf, Fail) and is then skipped,
+	// it is still considered to have failed.
+	// Execution will continue at the next test or benchmark. See also FailNow.
+	// SkipNow must be called from the goroutine running the test, not from
+	// other goroutines created during the test. Calling SkipNow does not stop
+	// those other goroutines.
+	SkipNow()
+
+	// Skipped reports whether the test was skipped.
+	Skipped() bool
+
+	// Helper marks the calling function as a test helper function.
+	// When printing file and line information, that function will be skipped.
+	// Helper may be called simultaneously from multiple goroutines.
+	Helper()
+
+	// Cleanup registers a function to be called when the test (or subtest) and all its
+	// subtests complete. Cleanup functions will be called in last added,
+	// first called order.
+	Cleanup(f func())
+
+	// TempDir returns a temporary directory for the test to use.
+	// The directory is automatically removed by Cleanup when the test and
+	// all its subtests complete.
+	// Each subsequent call to t.TempDir returns a unique directory;
+	// if the directory creation fails, TempDir terminates the test by calling Fatal.
+	TempDir() string
+
+	// Run runs f as a subtest of t called name.
+	//
+	// Run may be called simultaneously from multiple goroutines, but all such calls
+	// must return before the outer test function for t returns.
+	Run(name string, f func()) bool
+
+	// Deadline reports the time at which the test binary will have
+	// exceeded the timeout specified by the -timeout flag.
+	//
+	// The ok result is false if the -timeout flag indicates “no timeout” (0).
+	Deadline() (deadline time.Time, ok bool)
+}
+
+type testingT struct {
+	*testing.T
+}
+
+// Errorln is equivalent to Log followed by Fail.
+func (p testingT) Errorln(args ...any) {
+	p.T.Error(args...)
+}
+
+// Run runs f as a subtest of t called name.
+//
+// Run may be called simultaneously from multiple goroutines, but all such calls
+// must return before the outer test function for t returns.
+func (p testingT) Run(name string, f func()) bool {
+	return p.T.Run(name, func(t *testing.T) { f() })
+}
+
+// -----------------------------------------------------------------------------
+
 type Case struct {
 	*Request
 	*App
-	name string
+	caseT
 
 	DefaultHeader http.Header
 }
@@ -32,14 +153,17 @@ func New() *Case {
 	return &Case{}
 }
 
-func (p *Case) initCase(app *App) {
-	p.App = app
-	p.DefaultHeader = make(http.Header)
+// Gopt_Case_TestMain is required by Go+ compiler as the entry of a YAP test case.
+func Gopt_Case_TestMain(c interface{ initCase(*App, caseT) }, t *testing.T) {
+	app := new(App).initApp()
+	c.initCase(app, testingT{t})
+	c.(interface{ Main() }).Main()
 }
 
-func (p *Case) Run(name string, doSth func()) {
-	p.name = name
-	doSth()
+func (p *Case) initCase(app *App, t caseT) {
+	p.App = app
+	p.caseT = t
+	p.DefaultHeader = make(http.Header)
 }
 
 func (p *Case) Req(method, url string) *Request {
@@ -55,3 +179,5 @@ func (p *Case) Get(url string) *Request {
 func (p *Case) Post(url string) *Request {
 	return p.Req(http.MethodPost, url)
 }
+
+// -----------------------------------------------------------------------------
diff --git a/ytest/classfile.go b/ytest/classfile.go
index f62f48a..19cae97 100644
--- a/ytest/classfile.go
+++ b/ytest/classfile.go
@@ -19,7 +19,9 @@ package ytest
 import (
 	"io"
 	"net/http"
+	"os"
 	"strings"
+	"testing"
 )
 
 const (
@@ -39,14 +41,23 @@ func (p *App) initApp() *App {
 	return p
 }
 
-// Gopt_App_Main is required by Go+ compiler as the entry of a YAP testing project.
-func Gopt_App_Main(app interface{ initApp() *App }, workers ...interface{ initCase(*App) }) {
+// Gopt_App_TestMain is required by Go+ compiler as the TestMain entry of a YAP testing project.
+func Gopt_App_TestMain(app interface{ initApp() *App }, m *testing.M) {
+	app.initApp()
+	if me, ok := app.(interface{ MainEntry() }); ok {
+		me.MainEntry()
+	}
+	os.Exit(m.Run())
+}
+
+// Gopt_App_Main is required by Go+ compiler as the Main entry of a YAP testing project.
+func Gopt_App_Main(app interface{ initApp() *App }, workers ...interface{ initCase(*App, caseT) }) {
 	a := app.initApp()
 	if me, ok := app.(interface{ MainEntry() }); ok {
 		me.MainEntry()
 	}
 	for _, worker := range workers {
-		worker.initCase(a)
+		worker.initCase(a, nil)
 		worker.(interface{ Main() }).Main()
 	}
 }
diff --git a/ytest/demo/example/example_yunit.gox b/ytest/demo/_example/example_ytest.gox
similarity index 100%
rename from ytest/demo/example/example_yunit.gox
rename to ytest/demo/_example/example_ytest.gox
diff --git a/ytest/demo/_example/gop_autogen.go b/ytest/demo/_example/gop_autogen.go
new file mode 100644
index 0000000..8b83229
--- /dev/null
+++ b/ytest/demo/_example/gop_autogen.go
@@ -0,0 +1,6 @@
+package main
+
+const _ = true
+
+func main() {
+}
diff --git a/ytest/demo/_example/gop_autogen_test.go b/ytest/demo/_example/gop_autogen_test.go
new file mode 100644
index 0000000..5e9fd52
--- /dev/null
+++ b/ytest/demo/_example/gop_autogen_test.go
@@ -0,0 +1,89 @@
+package main
+
+import (
+	"fmt"
+	"github.com/goplus/yap/ytest"
+	"testing"
+)
+
+type case_example struct {
+	ytest.Case
+}
+//line ytest/demo/example/example_ytest.gox:1
+func (this *case_example) Main() {
+//line ytest/demo/example/example_ytest.gox:1:1
+	this.Host("https://example.com", "http://localhost:8080")
+//line ytest/demo/example/example_ytest.gox:2:1
+	testauth := ytest.Oauth2("...")
+//line ytest/demo/example/example_ytest.gox:4:1
+	this.DefaultHeader.Set("User-Agent", "yaptest/0.7")
+//line ytest/demo/example/example_ytest.gox:6:1
+	this.Run("urlWithVar", func() {
+//line ytest/demo/example/example_ytest.gox:7:1
+		id := "123"
+//line ytest/demo/example/example_ytest.gox:8:1
+		this.Get("https://example.com/p/" + id)
+//line ytest/demo/example/example_ytest.gox:9:1
+		this.Send()
+//line ytest/demo/example/example_ytest.gox:10:1
+		fmt.Println("code:", this.Resp().Code())
+//line ytest/demo/example/example_ytest.gox:11:1
+		fmt.Println("body:", this.Resp().Body())
+	})
+//line ytest/demo/example/example_ytest.gox:14:1
+	this.Run("matchWithVar", func() {
+//line ytest/demo/example/example_ytest.gox:15:1
+		code := ytest.Gopx_Var_Cast__0[int]()
+//line ytest/demo/example/example_ytest.gox:16:1
+		id := "123"
+//line ytest/demo/example/example_ytest.gox:17:1
+		this.Get("https://example.com/p/" + id)
+//line ytest/demo/example/example_ytest.gox:18:1
+		this.RetWith(code)
+//line ytest/demo/example/example_ytest.gox:19:1
+		fmt.Println("code:", code)
+//line ytest/demo/example/example_ytest.gox:20:1
+		ytest.Match__4(code, 200)
+	})
+//line ytest/demo/example/example_ytest.gox:23:1
+	this.Run("postWithAuth", func() {
+//line ytest/demo/example/example_ytest.gox:24:1
+		id := "123"
+//line ytest/demo/example/example_ytest.gox:25:1
+		title := "title"
+//line ytest/demo/example/example_ytest.gox:26:1
+		author := "author"
+//line ytest/demo/example/example_ytest.gox:27:1
+		this.Post("https://example.com/p/" + id)
+//line ytest/demo/example/example_ytest.gox:28:1
+		this.Auth(testauth)
+//line ytest/demo/example/example_ytest.gox:29:1
+		this.Json(map[string]string{"title": title, "author": author})
+//line ytest/demo/example/example_ytest.gox:33:1
+		this.RetWith(200)
+//line ytest/demo/example/example_ytest.gox:34:1
+		fmt.Println("body:", this.Resp().Body())
+	})
+//line ytest/demo/example/example_ytest.gox:37:1
+	this.Run("mathJsonObject", func() {
+//line ytest/demo/example/example_ytest.gox:38:1
+		title := ytest.Gopx_Var_Cast__0[string]()
+//line ytest/demo/example/example_ytest.gox:39:1
+		author := ytest.Gopx_Var_Cast__0[string]()
+//line ytest/demo/example/example_ytest.gox:40:1
+		id := "123"
+//line ytest/demo/example/example_ytest.gox:41:1
+		this.Get("https://example.com/p/" + id)
+//line ytest/demo/example/example_ytest.gox:42:1
+		this.RetWith(200)
+//line ytest/demo/example/example_ytest.gox:43:1
+		this.Json(map[string]*ytest.Var__0[string]{"title": title, "author": author})
+//line ytest/demo/example/example_ytest.gox:47:1
+		fmt.Println("title:", title)
+//line ytest/demo/example/example_ytest.gox:48:1
+		fmt.Println("author:", author)
+	})
+}
+func Test_example(t *testing.T) {
+	ytest.Gopt_Case_TestMain(new(case_example), t)
+}
diff --git a/ytest/demo/example/gop_autogen.go b/ytest/demo/example/gop_autogen.go
deleted file mode 100644
index 0e0d935..0000000
--- a/ytest/demo/example/gop_autogen.go
+++ /dev/null
@@ -1,92 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/goplus/yap/ytest"
-)
-
-const _ = true
-
-func main() {
-//line ytest/demo/example/example_yunit.gox:37:1
-	ytest.Gopt_App_Main(new(ytest.App), new(example))
-}
-
-type example struct {
-	ytest.Case
-}
-//line ytest/demo/example/example_yunit.gox:1
-func (this *example) Main() {
-//line ytest/demo/example/example_yunit.gox:1:1
-	this.Host("https://example.com", "http://localhost:8080")
-//line ytest/demo/example/example_yunit.gox:2:1
-	testauth := ytest.Oauth2("...")
-//line ytest/demo/example/example_yunit.gox:4:1
-	this.DefaultHeader.Set("User-Agent", "yaptest/0.7")
-//line ytest/demo/example/example_yunit.gox:6:1
-	this.Run("urlWithVar", func() {
-//line ytest/demo/example/example_yunit.gox:7:1
-		id := "123"
-//line ytest/demo/example/example_yunit.gox:8:1
-		this.Get("https://example.com/p/" + id)
-//line ytest/demo/example/example_yunit.gox:9:1
-		this.Send()
-//line ytest/demo/example/example_yunit.gox:10:1
-		fmt.Println("code:", this.Resp().Code())
-//line ytest/demo/example/example_yunit.gox:11:1
-		fmt.Println("body:", this.Resp().Body())
-	})
-//line ytest/demo/example/example_yunit.gox:14:1
-	this.Run("matchWithVar", func() {
-//line ytest/demo/example/example_yunit.gox:15:1
-		code := ytest.Gopx_Var_Cast__0[int]()
-//line ytest/demo/example/example_yunit.gox:16:1
-		id := "123"
-//line ytest/demo/example/example_yunit.gox:17:1
-		this.Get("https://example.com/p/" + id)
-//line ytest/demo/example/example_yunit.gox:18:1
-		this.RetWith(code)
-//line ytest/demo/example/example_yunit.gox:19:1
-		fmt.Println("code:", code)
-//line ytest/demo/example/example_yunit.gox:20:1
-		ytest.Match__4(code, 200)
-	})
-//line ytest/demo/example/example_yunit.gox:23:1
-	this.Run("postWithAuth", func() {
-//line ytest/demo/example/example_yunit.gox:24:1
-		id := "123"
-//line ytest/demo/example/example_yunit.gox:25:1
-		title := "title"
-//line ytest/demo/example/example_yunit.gox:26:1
-		author := "author"
-//line ytest/demo/example/example_yunit.gox:27:1
-		this.Post("https://example.com/p/" + id)
-//line ytest/demo/example/example_yunit.gox:28:1
-		this.Auth(testauth)
-//line ytest/demo/example/example_yunit.gox:29:1
-		this.Json(map[string]string{"title": title, "author": author})
-//line ytest/demo/example/example_yunit.gox:33:1
-		this.RetWith(200)
-//line ytest/demo/example/example_yunit.gox:34:1
-		fmt.Println("body:", this.Resp().Body())
-	})
-//line ytest/demo/example/example_yunit.gox:37:1
-	this.Run("mathJsonObject", func() {
-//line ytest/demo/example/example_yunit.gox:38:1
-		title := ytest.Gopx_Var_Cast__0[string]()
-//line ytest/demo/example/example_yunit.gox:39:1
-		author := ytest.Gopx_Var_Cast__0[string]()
-//line ytest/demo/example/example_yunit.gox:40:1
-		id := "123"
-//line ytest/demo/example/example_yunit.gox:41:1
-		this.Get("https://example.com/p/" + id)
-//line ytest/demo/example/example_yunit.gox:42:1
-		this.RetWith(200)
-//line ytest/demo/example/example_yunit.gox:43:1
-		this.Json(map[string]*ytest.Var__0[string]{"title": title, "author": author})
-//line ytest/demo/example/example_yunit.gox:47:1
-		fmt.Println("title:", title)
-//line ytest/demo/example/example_yunit.gox:48:1
-		fmt.Println("author:", author)
-	})
-}