diff --git a/pkg/hook/hook.go b/pkg/hook/hook.go
index 95b7654e..e36ae40d 100644
--- a/pkg/hook/hook.go
+++ b/pkg/hook/hook.go
@@ -14,8 +14,8 @@ type Hook struct {
 	mu          sync.RWMutex
 }
 
-var _ symbol.LoadHook = &Hook{}
-var _ symbol.UnloadHook = &Hook{}
+var _ symbol.LoadHook = (*Hook)(nil)
+var _ symbol.UnloadHook = (*Hook)(nil)
 
 // New creates a new Hook instance.
 func New() *Hook {
diff --git a/pkg/node/onetomany.go b/pkg/node/onetomany.go
index e8c5e55a..2f2512bf 100644
--- a/pkg/node/onetomany.go
+++ b/pkg/node/onetomany.go
@@ -27,7 +27,7 @@ type (
 	}
 )
 
-var _ Node = &OneToManyNode{}
+var _ Node = (*OneToManyNode)(nil)
 
 // NewOneToManyNode returns a new OneToManyNode.
 func NewOneToManyNode(config OneToManyNodeConfig) *OneToManyNode {
diff --git a/pkg/node/onetoone.go b/pkg/node/onetoone.go
index 8e4493f6..8ff38c96 100644
--- a/pkg/node/onetoone.go
+++ b/pkg/node/onetoone.go
@@ -28,7 +28,7 @@ type (
 	}
 )
 
-var _ Node = &OneToOneNode{}
+var _ Node = (*OneToOneNode)(nil)
 
 // NewOneToOneNode returns a new OneToOneNode.
 func NewOneToOneNode(config OneToOneNodeConfig) *OneToOneNode {
diff --git a/pkg/plugin/networkx/http.go b/pkg/plugin/networkx/http.go
index 78d6dd62..2f760741 100644
--- a/pkg/plugin/networkx/http.go
+++ b/pkg/plugin/networkx/http.go
@@ -199,7 +199,7 @@ var (
 )
 
 var _ node.Node = (*HTTPNode)(nil)
-var _ http.Handler = &HTTPNode{}
+var _ http.Handler = (*HTTPNode)(nil)
 var _ scheme.Spec = (*HTTPSpec)(nil)
 
 var forbiddenResponseHeaderRegexps []*regexp.Regexp
diff --git a/pkg/scheme/scheme.go b/pkg/scheme/scheme.go
index 7aeb79f1..c2fa8e58 100644
--- a/pkg/scheme/scheme.go
+++ b/pkg/scheme/scheme.go
@@ -16,7 +16,7 @@ type Scheme struct {
 	mu     sync.RWMutex
 }
 
-var _ Codec = &Scheme{}
+var _ Codec = (*Scheme)(nil)
 
 // New creates a new Scheme instance.
 func New() *Scheme {
diff --git a/pkg/scheme/unstructured.go b/pkg/scheme/unstructured.go
index a8cdce30..a488befc 100644
--- a/pkg/scheme/unstructured.go
+++ b/pkg/scheme/unstructured.go
@@ -22,7 +22,7 @@ const (
 	KeyLinks     = "links"
 )
 
-var _ Spec = &Unstructured{}
+var _ Spec = (*Unstructured)(nil)
 
 // NewUnstructured returns a new Unstructured instance with an optional primitive.Map.
 func NewUnstructured(doc *primitive.Map) *Unstructured {