diff --git a/config/configgrpc/configgrpc.go b/config/configgrpc/configgrpc.go
index 574a9def2ce..ef71e61bc96 100644
--- a/config/configgrpc/configgrpc.go
+++ b/config/configgrpc/configgrpc.go
@@ -388,7 +388,5 @@ func GetGRPCCompressionKey(compressionType string) string {
 }
 
 func RegisterClientDialOptionHandlers(handlers ...ClientDialOptionHandler) {
-	for _, handler := range handlers {
-		clientOptionHandlerList = append(clientOptionHandlerList, handler)
-	}
+	clientOptionHandlerList = append(clientOptionHandlerList, handlers...)
 }
diff --git a/config/configgrpc/configgrpc_test.go b/config/configgrpc/configgrpc_test.go
index 92c06538568..3a599fb3744 100644
--- a/config/configgrpc/configgrpc_test.go
+++ b/config/configgrpc/configgrpc_test.go
@@ -553,7 +553,8 @@ func TestRegisterClientDialOptionHandler(t *testing.T) {
 		})
 	})
 	gcs := &GRPCClientSettings{}
-	opts, err := gcs.ToDialOptions()
+	opts, err := gcs.ToDialOptions(map[config.ComponentID]component.Extension{})
 	assert.NoError(t, err)
-	assert.Len(t, opts, 2)
+	// Also count opentelemetry's observability plugin interceptors
+	assert.Len(t, opts, 4)
 }