diff --git a/Dockerfile b/Dockerfile
index e3051e0..37f96b4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.22 AS builder
+FROM golang:1.23 AS builder
 WORKDIR /go/src/github.com/rakutentech/passenger-go-exporter
 
 COPY go.mod go.sum ./
diff --git a/test/kubernetes/base/deployment.yaml b/test/kubernetes/base/deployment.yaml
index ad324d9..4ecf0e7 100644
--- a/test/kubernetes/base/deployment.yaml
+++ b/test/kubernetes/base/deployment.yaml
@@ -19,60 +19,61 @@ spec:
       labels:
         app: example
     spec:
+      replicas: 0
       volumes:
-        - name: tmp
-          emptyDir: {}
+      - name: tmp
+        emptyDir: {}
       containers:
-        - name: example
-          image: example
-          imagePullPolicy: IfNotPresent
-          ports:
-            - containerPort: 3000
-              name: http
-              protocol: TCP
-          livenessProbe:
-            httpGet:
-              path: /
-              port: 3000
-          readinessProbe:
-            timeoutSeconds: 2
-            httpGet:
-              path: /
-              port: 3000
-          env:
-            - name: PASSENGER_INSTANCE_REGISTRY_DIR
-              value: /tmp/ruby
-          volumeMounts:
-            - mountPath: /tmp/ruby
-              name: tmp
-        - name: passenger-exporter
-          image: passenger-exporter
-          imagePullPolicy: IfNotPresent
-          env:
-            - name: PASSENGER_INSTANCE_REGISTRY_DIR
-              value: /tmp/ruby
-          ports:
-            - containerPort: 9768
-              name: http
-              protocol: TCP
-          livenessProbe:
-            initialDelaySeconds: 10
-            timeoutSeconds: 2
-            httpGet:
-              path: /health
-              port: 9768
-          readinessProbe:
-            timeoutSeconds: 1
-            httpGet:
-              path: /health
-              port: 9768
-          resources:
-            limits:
-              cpu: 20m
-              memory: 60Mi
-            requests:
-              cpu: 20m
-              memory: 60Mi
-          volumeMounts:
-            - mountPath: /tmp/ruby
-              name: tmp
+      - name: example
+        image: example
+        imagePullPolicy: IfNotPresent
+        ports:
+        - containerPort: 3000
+          name: http
+          protocol: TCP
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 3000
+        readinessProbe:
+          timeoutSeconds: 2
+          httpGet:
+            path: /
+            port: 3000
+        env:
+        - name: PASSENGER_INSTANCE_REGISTRY_DIR
+          value: /tmp/ruby
+        volumeMounts:
+        - mountPath: /tmp/ruby
+          name: tmp
+      - name: passenger-exporter
+        image: passenger-exporter
+        imagePullPolicy: IfNotPresent
+        env:
+        - name: PASSENGER_INSTANCE_REGISTRY_DIR
+          value: /tmp/ruby
+        ports:
+        - containerPort: 9768
+          name: http
+          protocol: TCP
+        livenessProbe:
+          initialDelaySeconds: 10
+          timeoutSeconds: 2
+          httpGet:
+            path: /health
+            port: 9768
+        readinessProbe:
+          timeoutSeconds: 1
+          httpGet:
+            path: /health
+            port: 9768
+        resources:
+          limits:
+            cpu: 20m
+            memory: 60Mi
+          requests:
+            cpu: 20m
+            memory: 60Mi
+        volumeMounts:
+        - mountPath: /tmp/ruby
+          name: tmp