diff --git a/boomer.go b/boomer.go
index e15bc92b..0161a008 100644
--- a/boomer.go
+++ b/boomer.go
@@ -6,7 +6,13 @@ import (
 	"github.com/myzhan/boomer"
 )
 
-func HttpBoomer() *Boomer {
+var defaultBoomer = NewBoomer()
+
+func Run(testcases ...*TestCase) {
+	defaultBoomer.Run(testcases...)
+}
+
+func NewBoomer() *Boomer {
 	return &Boomer{}
 }
 
diff --git a/boomer_test.go b/boomer_test.go
index 6f0a3066..20aa39f4 100644
--- a/boomer_test.go
+++ b/boomer_test.go
@@ -18,5 +18,5 @@ func TestHttpBoomer(t *testing.T) {
 		},
 	}
 
-	HttpBoomer().Run(testcase1, testcase2)
+	Run(testcase1, testcase2)
 }
diff --git a/runner.go b/runner.go
index 5cc44bba..7872c1df 100644
--- a/runner.go
+++ b/runner.go
@@ -6,9 +6,13 @@ import (
 	"github.com/imroc/req"
 )
 
-var defaultRunner = HttpRunner()
+var defaultRunner = NewRunner()
 
-func HttpRunner() *Runner {
+func Test(testcases ...*TestCase) error {
+	return defaultRunner.Run(testcases...)
+}
+
+func NewRunner() *Runner {
 	return &Runner{
 		Client: req.New(),
 	}
diff --git a/runner_test.go b/runner_test.go
index acb969c9..c21c5321 100644
--- a/runner_test.go
+++ b/runner_test.go
@@ -31,7 +31,7 @@ func TestHttpRunner(t *testing.T) {
 		},
 	}
 
-	err := HttpRunner().Run(testcase1, testcase2)
+	err := Test(testcase1, testcase2)
 	if err != nil {
 		t.Fatalf("run testcase error: %v", err)
 	}