diff --git a/decode_test.go b/decode_test.go
new file mode 100644
index 0000000..14ba1f2
--- /dev/null
+++ b/decode_test.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestHandleInboxNoSignature(t *testing.T) {
+	s := httptest.NewServer(http.HandlerFunc(handleInbox))
+	defer s.Close()
+
+	req, _ := http.NewRequest("POST", s.URL, nil)
+	client := new(http.Client)
+	r, err := client.Do(req)
+	if err != nil {
+		t.Fatalf("Failed - " + err.Error())
+	}
+	if r.StatusCode != 400 {
+		t.Fatalf("Failed - StatusCode is not 400")
+	}
+}
+
+func TestHandleInboxInvalidMethod(t *testing.T) {
+	s := httptest.NewServer(http.HandlerFunc(handleInbox))
+	defer s.Close()
+
+	req, _ := http.NewRequest("GET", s.URL, nil)
+	client := new(http.Client)
+	r, err := client.Do(req)
+	if err != nil {
+		t.Fatalf("Failed - " + err.Error())
+	}
+	if r.StatusCode != 404 {
+		t.Fatalf("Failed - StatusCode is not 404")
+	}
+}
diff --git a/handle_test.go b/handle_test.go
index 371d54b..3b71732 100644
--- a/handle_test.go
+++ b/handle_test.go
@@ -10,7 +10,7 @@ import (
 	"testing"
 
 	"github.com/yukimochi/Activity-Relay/ActivityPub"
-	keyloader "github.com/yukimochi/Activity-Relay/KeyLoader"
+	"github.com/yukimochi/Activity-Relay/KeyLoader"
 )
 
 func TestMain(m *testing.M) {
@@ -60,6 +60,7 @@ func TestHandleWebfingerGet(t *testing.T) {
 		t.Fatalf("WebfingerResource's Host not valid.")
 	}
 }
+
 func TestHandleWebfingerGetBadResource(t *testing.T) {
 	s := httptest.NewServer(http.HandlerFunc(handleWebfinger))
 	defer s.Close()
@@ -77,6 +78,7 @@ func TestHandleWebfingerGetBadResource(t *testing.T) {
 		t.Fatalf("Failed - StatusCode is not 404.")
 	}
 }
+
 func TestHandleWebfingerInvalidMethod(t *testing.T) {
 	s := httptest.NewServer(http.HandlerFunc(handleWebfinger))
 	defer s.Close()
@@ -91,6 +93,7 @@ func TestHandleWebfingerInvalidMethod(t *testing.T) {
 		t.Fatalf("Failed - StatusCode is not 400.")
 	}
 }
+
 func TestHandleActorGet(t *testing.T) {
 	s := httptest.NewServer(http.HandlerFunc(handleActor))
 	defer s.Close()