diff --git a/spi/spi.go b/spi/spi.go
index 85b4055..6579600 100644
--- a/spi/spi.go
+++ b/spi/spi.go
@@ -66,7 +66,7 @@ func LoadService[T any](dir string, symName string) ([]T, error) {
 			// 尝试将符号断言为接口类型
 			service, ok := sym.(T)
 			if !ok {
-				return errors.New("插件非该接口类型")
+				return ErrInvalidSo
 			}
 			// 收集服务
 			services = append(services, service)
diff --git a/spi/spi_test.go b/spi/spi_test.go
index 93f2801..ae83e18 100644
--- a/spi/spi_test.go
+++ b/spi/spi_test.go
@@ -87,6 +87,14 @@ func (l *LoadServiceSuite) Test_LoadService() {
 				return assert.ErrorIs(t, err, ErrSymbolNameNotFound)
 			},
 		},
+		{
+			name:    "加载的对象未实现对应的抽象",
+			dir:     "./testdata/user_service3",
+			svcName: "UserSvc",
+			assertFunc: func(t assert.TestingT, err error, i ...interface{}) bool {
+				return assert.ErrorIs(t, err, ErrInvalidSo)
+			},
+		},
 	}
 	for _, tc := range testcases {
 		t.Run(tc.name, func(t *testing.T) {
diff --git a/spi/testdata/user_service3/a.go b/spi/testdata/user_service3/a.go
new file mode 100644
index 0000000..bda4404
--- /dev/null
+++ b/spi/testdata/user_service3/a.go
@@ -0,0 +1,27 @@
+// Copyright 2021 ecodeclub
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+// 测试用
+
+//go:generate go build -race --buildmode=plugin   -o a.so ./a.go
+
+type UserService struct{}
+
+func (u UserService) GetV1() string {
+	return "Get"
+}
+
+var UserSvc UserService