diff --git a/docs/user/tutorials/01-10-setup-custom-domain-for-workload.md b/docs/user/tutorials/01-10-setup-custom-domain-for-workload.md
index 3a51ab4b8..ffb5df221 100644
--- a/docs/user/tutorials/01-10-setup-custom-domain-for-workload.md
+++ b/docs/user/tutorials/01-10-setup-custom-domain-for-workload.md
@@ -160,6 +160,8 @@ export SECRET={SECRET_NAME}
     spec:
       secretName: $TLS_SECRET
       commonName: $DOMAIN_TO_EXPOSE_WORKLOADS
+      issuerRef:
+        name: garden
     EOF
     ```
 
diff --git a/internal/reconciliations/gateway/certificate.yaml b/internal/reconciliations/gateway/certificate.yaml
index 6a6151101..0659cc9ff 100644
--- a/internal/reconciliations/gateway/certificate.yaml
+++ b/internal/reconciliations/gateway/certificate.yaml
@@ -12,6 +12,8 @@ metadata:
 spec:
   secretName: {{.SecretName}}
   commonName: "*.{{.Domain}}"
+  issuerRef:
+    name: garden
   privateKey:
     size: 4096
 
diff --git a/tests/integration/testsuites/custom-domain/manifests/resources.yaml b/tests/integration/testsuites/custom-domain/manifests/resources.yaml
index f0101bf5b..1b131af8a 100644
--- a/tests/integration/testsuites/custom-domain/manifests/resources.yaml
+++ b/tests/integration/testsuites/custom-domain/manifests/resources.yaml
@@ -51,6 +51,8 @@ metadata:
 spec:
   secretName: "{{.NamePrefix}}-{{.TestID}}"
   commonName: "*.{{.Subdomain}}"
+  issuerRef:
+    name: garden
 ---
 apiVersion: networking.istio.io/v1beta1
 kind: Gateway