diff --git a/.github/workflows/cd-pr.yml b/.github/workflows/cd-pr.yml
index 4541004..86391b0 100644
--- a/.github/workflows/cd-pr.yml
+++ b/.github/workflows/cd-pr.yml
@@ -98,6 +98,60 @@ jobs:
           echo | openssl s_client -connect 191.252.159.227:6443 2>/dev/null \
             | openssl x509 -noout -text | grep -E "Issuer|Subject|Not Before|Not After|DNS:|IP:"
 
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+
+      - name: Test connection with Go
+        run: |
+          cat > /tmp/test.go << 'EOF'
+          package main
+      
+          import (
+            "crypto/tls"
+            "crypto/x509"
+            "fmt"
+            "io"
+            "net/http"
+            "os"
+          )
+      
+          func main() {
+            cert, err := tls.LoadX509KeyPair(os.Args[1], os.Args[2])
+            if err != nil {
+              panic(err)
+            }
+            caCert, err := os.ReadFile(os.Args[3])
+            if err != nil {
+              panic(err)
+            }
+            caCertPool := x509.NewCertPool()
+            caCertPool.AppendCertsFromPEM(caCert)
+            tlsConfig := &tls.Config{
+              Certificates: []tls.Certificate{cert},
+              RootCAs:      caCertPool,
+            }
+            transport := &http.Transport{TLSClientConfig: tlsConfig}
+            client := &http.Client{Transport: transport}
+            resp, err := client.Get("https://191.252.159.227:6443/api/v1/namespaces/tasknote-stg")
+            if err != nil {
+              fmt.Println("ERROR:", err)
+              os.Exit(1)
+            }
+            defer resp.Body.Close()
+            body, _ := io.ReadAll(resp.Body)
+            fmt.Println("STATUS:", resp.Status)
+            fmt.Println("BODY:", string(body)[:100])
+          }
+          EOF
+      
+          kubectl config view --raw -o jsonpath='{.users[0].user.client-certificate-data}' | base64 -d > /tmp/client.crt
+          kubectl config view --raw -o jsonpath='{.users[0].user.client-key-data}' | base64 -d > /tmp/client.key
+          kubectl config view --raw -o jsonpath='{.clusters[0].cluster.certificate-authority-data}' | base64 -d > /tmp/ca.crt
+      
+          cd /tmp && go run test.go /tmp/client.crt /tmp/client.key /tmp/ca.crt
+
       - name: Terraform Plan
         id: check-changes
         working-directory: terraform-stg