diff --git a/pkg/karmadactl/describe/describe.go b/pkg/karmadactl/describe/describe.go
index b2c2ce378..9c041371c 100644
--- a/pkg/karmadactl/describe/describe.go
+++ b/pkg/karmadactl/describe/describe.go
@@ -17,6 +17,7 @@ limitations under the License.
 package describe
 
 import (
+	"errors"
 	"fmt"
 
 	"github.com/spf13/cobra"
@@ -146,7 +147,7 @@ func (o *CommandDescribeOptions) Validate() error {
 		return err
 	}
 	if o.OperationScope == options.Members && len(o.Cluster) == 0 {
-		return fmt.Errorf("must specify a member cluster")
+		return errors.New("must specify a member cluster")
 	}
 	return nil
 }
diff --git a/pkg/karmadactl/describe/describe_test.go b/pkg/karmadactl/describe/describe_test.go
new file mode 100644
index 000000000..c85fc684b
--- /dev/null
+++ b/pkg/karmadactl/describe/describe_test.go
@@ -0,0 +1,110 @@
+/*
+Copyright 2024 The Karmada Authors.
+
+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 describe
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+	"testing"
+
+	appsv1 "k8s.io/api/apps/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	describecmd "k8s.io/kubectl/pkg/describe"
+
+	"github.com/karmada-io/karmada/pkg/karmadactl/options"
+)
+
+var deployment = &appsv1.Deployment{
+	TypeMeta: metav1.TypeMeta{
+		Kind:       "Deployment",
+		APIVersion: "apps/v1",
+	},
+	ObjectMeta: metav1.ObjectMeta{
+		Name:      "test-deployment",
+		Namespace: "default",
+	},
+	Spec: appsv1.DeploymentSpec{
+		Selector: &metav1.LabelSelector{
+			MatchLabels: map[string]string{"app": "nginx"},
+		},
+		Template: corev1.PodTemplateSpec{
+			ObjectMeta: metav1.ObjectMeta{},
+			Spec: corev1.PodSpec{
+				Containers: []corev1.Container{
+					{
+						Image:           "nginx",
+						ImagePullPolicy: "Always",
+						Name:            "nginx",
+					},
+				},
+			},
+		},
+	},
+}
+
+type ResourceDescribe struct{}
+
+func (rd ResourceDescribe) Describe(string, string, describecmd.DescriberSettings) (output string, err error) {
+	// Serialize the deployment response to JSON.
+	bodyBytes, err := json.Marshal(deployment)
+	if err != nil {
+		return "", fmt.Errorf("failed to serialize deployment response: %v", err)
+	}
+
+	// Return the serialized deployment as a string (pretty-printed JSON).
+	return string(bodyBytes), nil
+}
+
+func TestValidate(t *testing.T) {
+	tests := []struct {
+		name         string
+		describeOpts *CommandDescribeOptions
+		wantErr      bool
+		errMsg       string
+	}{
+		{
+			name:         "Validate_WithMemberOperationScopeAndWithoutCluster_MemberClusterOptMustBeSpecified",
+			describeOpts: &CommandDescribeOptions{OperationScope: options.Members},
+			wantErr:      true,
+			errMsg:       "must specify a member cluster",
+		},
+		{
+			name: "Validate__WithMemberOperationScopeAndWithCluster_Validated",
+			describeOpts: &CommandDescribeOptions{
+				OperationScope: options.Members,
+				Cluster:        "test-cluster",
+			},
+			wantErr: false,
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			err := test.describeOpts.Validate()
+			if err == nil && test.wantErr {
+				t.Fatal("expected an error, but got none")
+			}
+			if err != nil && !test.wantErr {
+				t.Errorf("unexpected error, got: %v", err)
+			}
+			if err != nil && test.wantErr && !strings.Contains(err.Error(), test.errMsg) {
+				t.Errorf("expected error message %s to be in %s", test.errMsg, err.Error())
+			}
+		})
+	}
+}