diff --git a/controllers/spec/function_test.go b/controllers/spec/function_test.go
index 88c9067a..feaeb026 100644
--- a/controllers/spec/function_test.go
+++ b/controllers/spec/function_test.go
@@ -97,7 +97,7 @@ func makeFunctionSample(functionName string) *v1alpha1.Function {
 	}
 }
 
-func makeFunctionSamplePackageUrl(functionName string) *v1alpha1.Function {
+func makeFunctionSamplePackageURL(functionName string) *v1alpha1.Function {
 	f := makeFunctionSample(functionName)
 	f.Spec.Java.JarLocation = "function://public/default/java-function"
 	f.Spec.Java.Jar = "/tmp/java-function.jar"
@@ -106,7 +106,7 @@ func makeFunctionSamplePackageUrl(functionName string) *v1alpha1.Function {
 
 func TestInitContainerDownloader(t *testing.T) {
 	utils.EnableInitContainers = true
-	function := makeFunctionSamplePackageUrl("test")
+	function := makeFunctionSamplePackageURL("test")
 
 	objectMeta := MakeFunctionObjectMeta(function)
 
diff --git a/controllers/spec/sink.go b/controllers/spec/sink.go
index ad80b6df..237b00dd 100644
--- a/controllers/spec/sink.go
+++ b/controllers/spec/sink.go
@@ -19,12 +19,15 @@ package spec
 
 import (
 	"context"
+	"regexp"
+
+	"github.com/streamnative/function-mesh/utils"
+	"google.golang.org/protobuf/encoding
 	"github.com/streamnative/function-mesh/utils"
 	"google.golang.org/protobuf/encoding/protojson"
 	appsv1 "k8s.io/api/apps/v1"
 	autov2 "k8s.io/api/autoscaling/v2"
 	v1 "k8s.io/api/batch/v1"
-	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"regexp"
 	"sigs.k8s.io/controller-runtime/pkg/client"
diff --git a/controllers/spec/source.go b/controllers/spec/source.go
index d0d1125d..20d14416 100644
--- a/controllers/spec/source.go
+++ b/controllers/spec/source.go
@@ -20,6 +20,8 @@ package spec
 import (
 	"context"
 	"fmt"
+	"regexp"
+
 	"github.com/streamnative/function-mesh/utils"
 	"google.golang.org/protobuf/encoding/protojson"
 	appsv1 "k8s.io/api/apps/v1"
@@ -27,7 +29,6 @@ import (
 	v1 "k8s.io/api/batch/v1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"regexp"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	"github.com/streamnative/function-mesh/api/compute/v1alpha1"