diff --git a/binding/multipart_form_mapping_test.go b/binding/multipart_form_mapping_test.go
index 60b5cbfe..1888862f 100644
--- a/binding/multipart_form_mapping_test.go
+++ b/binding/multipart_form_mapping_test.go
@@ -14,7 +14,25 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestFormMultipartBindingOneFileToBytesArrayFail(t *testing.T) {
+func TestFormMultipartBindingOneFileToBytesFail1(t *testing.T) {
+	var test struct {
+		Voice []byte `form:"voice"`
+	}
+
+	file := testFile{"voice", "test.pcm", []byte("pcm pcm pcm")}
+	req := createRequestMultipartFiles(t, file)
+
+	err := req.ParseMultipartForm(3)
+	assert.NoError(t, err)
+
+	err = req.MultipartForm.RemoveAll()
+	assert.NoError(t, err)
+
+	err = mappingByPtr(&test, (*multipartRequest)(req), "form")
+	assert.Error(t, err)
+}
+
+func TestFormMultipartBindingOneFileToBytesArray(t *testing.T) {
 	var test struct {
 		Voice []byte `form:"voice"`
 	}