diff --git a/contrib/registry/etcd/watcher.go b/contrib/registry/etcd/watcher.go
index 22e63474c..a5bf63c41 100644
--- a/contrib/registry/etcd/watcher.go
+++ b/contrib/registry/etcd/watcher.go
@@ -7,7 +7,7 @@ import (
 	clientv3 "go.etcd.io/etcd/client/v3"
 )
 
-var _ registry.Watcher = &watcher{}
+var _ registry.Watcher = (*watcher)(nil)
 
 type watcher struct {
 	key         string
diff --git a/contrib/registry/eureka/client.go b/contrib/registry/eureka/client.go
index 35dd14729..f2b4e96f3 100644
--- a/contrib/registry/eureka/client.go
+++ b/contrib/registry/eureka/client.go
@@ -82,7 +82,7 @@ type DataCenterInfo struct {
 	Class string `json:"@class"`
 }
 
-var _ APIInterface = new(Client)
+var _ APIInterface = (*Client)(nil)
 
 type APIInterface interface {
 	Register(ctx context.Context, ep Endpoint) error
diff --git a/contrib/registry/eureka/watcher.go b/contrib/registry/eureka/watcher.go
index 468d97b24..de37d3229 100644
--- a/contrib/registry/eureka/watcher.go
+++ b/contrib/registry/eureka/watcher.go
@@ -6,7 +6,7 @@ import (
 	"github.com/go-kratos/kratos/v2/registry"
 )
 
-var _ registry.Watcher = &watcher{}
+var _ registry.Watcher = (*watcher)(nil)
 
 type watcher struct {
 	ctx        context.Context
diff --git a/contrib/registry/zookeeper/watcher.go b/contrib/registry/zookeeper/watcher.go
index 76f502fa8..f20096754 100644
--- a/contrib/registry/zookeeper/watcher.go
+++ b/contrib/registry/zookeeper/watcher.go
@@ -10,7 +10,7 @@ import (
 	"github.com/go-zookeeper/zk"
 )
 
-var _ registry.Watcher = &watcher{}
+var _ registry.Watcher = (*watcher)(nil)
 
 var ErrWatcherStopped = errors.New("watcher stopped")
 
diff --git a/middleware/logging/logging_test.go b/middleware/logging/logging_test.go
index 7242f8e04..6ad1a02c9 100644
--- a/middleware/logging/logging_test.go
+++ b/middleware/logging/logging_test.go
@@ -11,7 +11,7 @@ import (
 	"github.com/go-kratos/kratos/v2/transport"
 )
 
-var _ transport.Transporter = &Transport{}
+var _ transport.Transporter = (*Transport)(nil)
 
 type Transport struct {
 	kind      transport.Kind
diff --git a/middleware/selector/selector_test.go b/middleware/selector/selector_test.go
index 667d2755f..f12943e43 100644
--- a/middleware/selector/selector_test.go
+++ b/middleware/selector/selector_test.go
@@ -10,7 +10,7 @@ import (
 	"github.com/go-kratos/kratos/v2/transport"
 )
 
-var _ transport.Transporter = &Transport{}
+var _ transport.Transporter = (*Transport)(nil)
 
 type Transport struct {
 	kind      transport.Kind
diff --git a/middleware/tracing/tracing_test.go b/middleware/tracing/tracing_test.go
index 8de2ceea4..222a6accd 100644
--- a/middleware/tracing/tracing_test.go
+++ b/middleware/tracing/tracing_test.go
@@ -14,7 +14,7 @@ import (
 	"go.opentelemetry.io/otel/trace"
 )
 
-var _ transport.Transporter = &mockTransport{}
+var _ transport.Transporter = (*mockTransport)(nil)
 
 type headerCarrier http.Header
 
diff --git a/selector/p2c/p2c.go b/selector/p2c/p2c.go
index 6f8d5a3fa..5e339b0c2 100644
--- a/selector/p2c/p2c.go
+++ b/selector/p2c/p2c.go
@@ -17,7 +17,7 @@ const (
 	Name = "p2c"
 )
 
-var _ selector.Balancer = &Balancer{}
+var _ selector.Balancer = (*Balancer)(nil)
 
 // Option is random builder option.
 type Option func(o *options)
diff --git a/selector/random/random.go b/selector/random/random.go
index cf59534d0..3af52d416 100644
--- a/selector/random/random.go
+++ b/selector/random/random.go
@@ -13,7 +13,7 @@ const (
 	Name = "random"
 )
 
-var _ selector.Balancer = &Balancer{} // Name is balancer name
+var _ selector.Balancer = (*Balancer)(nil) // Name is balancer name
 
 // Option is random builder option.
 type Option func(o *options)
diff --git a/selector/wrr/wrr.go b/selector/wrr/wrr.go
index 0b95e04fb..3d91d62e3 100644
--- a/selector/wrr/wrr.go
+++ b/selector/wrr/wrr.go
@@ -13,7 +13,7 @@ const (
 	Name = "wrr"
 )
 
-var _ selector.Balancer = &Balancer{} // Name is balancer name
+var _ selector.Balancer = (*Balancer)(nil) // Name is balancer name
 
 // Option is random builder option.
 type Option func(o *options)
diff --git a/transport/grpc/transport.go b/transport/grpc/transport.go
index a11a271ae..866228d1d 100644
--- a/transport/grpc/transport.go
+++ b/transport/grpc/transport.go
@@ -6,7 +6,7 @@ import (
 	"google.golang.org/grpc/metadata"
 )
 
-var _ transport.Transporter = &Transport{}
+var _ transport.Transporter = (*Transport)(nil)
 
 // Transport is a gRPC transport.
 type Transport struct {
diff --git a/transport/http/transport.go b/transport/http/transport.go
index c377b5ad9..e7f53f6db 100644
--- a/transport/http/transport.go
+++ b/transport/http/transport.go
@@ -7,7 +7,7 @@ import (
 	"github.com/go-kratos/kratos/v2/transport"
 )
 
-var _ Transporter = &Transport{}
+var _ Transporter = (*Transport)(nil)
 
 // Transporter is http Transporter
 type Transporter interface {