diff --git a/hit.go b/hit.go
index 4f579bad..690f1580 100644
--- a/hit.go
+++ b/hit.go
@@ -39,7 +39,6 @@ package hit
 
 import (
 	"context"
-	"fmt"
 	"net/http"
 
 	"golang.org/x/xerrors"
@@ -68,9 +67,6 @@ type Hit interface {
 	// BaseURL returns the current base url.
 	BaseURL() string
 
-	// SetBaseURL sets the base url.
-	SetBaseURL(url string, a ...interface{})
-
 	// CurrentStep returns the current working step.
 	CurrentStep() IStep
 
@@ -167,10 +163,6 @@ func (hit *hitImpl) BaseURL() string {
 	return hit.baseURL
 }
 
-func (hit *hitImpl) SetBaseURL(url string, a ...interface{}) {
-	hit.baseURL = fmt.Sprintf(url, a...)
-}
-
 func (hit *hitImpl) collectSteps(state StepTime) []IStep {
 	var collectedSteps []IStep
 	for i := 0; i < len(hit.steps); i++ {
diff --git a/static.go b/static.go
index 5151ee3d..a72f4ac1 100644
--- a/static.go
+++ b/static.go
@@ -2,6 +2,7 @@ package hit
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"net/http"
 	"os"
@@ -154,7 +155,10 @@ func BaseURL(url string, a ...interface{}) IStep {
 		When:     requestCreateStep,
 		CallPath: newCallPath("BaseURL", nil),
 		Exec: func(hit *hitImpl) error {
-			hit.SetBaseURL(url, a...)
+			if len(a) > 0 {
+				url = fmt.Sprintf(url, a...)
+			}
+			hit.baseURL = url
 			return nil
 		},
 	}
@@ -192,7 +196,7 @@ func makeMethodStep(fnName, method, url string, a ...interface{}) IStep {
 		CallPath: newCallPath(fnName, nil),
 		Exec: func(hit *hitImpl) error {
 			hit.request.Method = method
-			url = misc.MakeURL(hit.BaseURL(), url, a...)
+			url = misc.MakeURL(hit.baseURL, url, a...)
 			if url == "" {
 				hit.request.URL = new(urlpkg.URL)
 				return nil