diff --git a/internal/gatewayapi/testdata/backend-with-fallback.out.yaml b/internal/gatewayapi/testdata/backend-with-fallback.out.yaml
index 74bd61795fe2..e7652fff7170 100644
--- a/internal/gatewayapi/testdata/backend-with-fallback.out.yaml
+++ b/internal/gatewayapi/testdata/backend-with-fallback.out.yaml
@@ -141,6 +141,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*'
+      ipFamily: IPv4
       isHTTP2: false
       metadata:
         kind: Gateway
diff --git a/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override-invalid-valueref.out.yaml b/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override-invalid-valueref.out.yaml
index c1542d9caec2..99147cbdc1ec 100644
--- a/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override-invalid-valueref.out.yaml
+++ b/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override-invalid-valueref.out.yaml
@@ -297,6 +297,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*'
+      ipFamily: IPv4
       isHTTP2: true
       metadata:
         kind: Gateway
@@ -335,6 +336,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*'
+      ipFamily: IPv4
       isHTTP2: false
       metadata:
         kind: Gateway
diff --git a/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override.out.yaml b/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override.out.yaml
index 568a57af4849..a871686d5a29 100644
--- a/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override.out.yaml
+++ b/internal/gatewayapi/testdata/backendtrafficpolicy-with-response-override.out.yaml
@@ -296,6 +296,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*'
+      ipFamily: IPv4
       isHTTP2: true
       metadata:
         kind: Gateway
@@ -356,6 +357,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*'
+      ipFamily: IPv4
       isHTTP2: false
       metadata:
         kind: Gateway
diff --git a/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter-invalid.out.yaml b/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter-invalid.out.yaml
index ab24ec0e81df..75e179dc974d 100644
--- a/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter-invalid.out.yaml
+++ b/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter-invalid.out.yaml
@@ -351,6 +351,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*.envoyproxy.io'
+      ipFamily: IPv4
       isHTTP2: false
       metadata:
         kind: Gateway
diff --git a/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter.out.yaml b/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter.out.yaml
index 916f7d0cefe9..e5bfd9356308 100644
--- a/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter.out.yaml
+++ b/internal/gatewayapi/testdata/httproute-with-urlrewrite-hostname-filter.out.yaml
@@ -252,6 +252,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*.envoyproxy.io'
+      ipFamily: IPv4
       isHTTP2: false
       metadata:
         kind: Gateway
diff --git a/internal/gatewayapi/testdata/securitypolicy-with-oidc-backendcluster.out.yaml b/internal/gatewayapi/testdata/securitypolicy-with-oidc-backendcluster.out.yaml
index d6f0c4dbc47a..ff8fa3129cdf 100644
--- a/internal/gatewayapi/testdata/securitypolicy-with-oidc-backendcluster.out.yaml
+++ b/internal/gatewayapi/testdata/securitypolicy-with-oidc-backendcluster.out.yaml
@@ -182,6 +182,7 @@ xdsIR:
     - address: 0.0.0.0
       hostnames:
       - '*'
+      ipFamily: IPv4
       isHTTP2: false
       metadata:
         kind: Gateway