diff --git a/integration/combination/test_custom_http_api_domains_test.py b/integration/combination/test_custom_http_api_domains_test.py
index 688389953..8711ba83b 100644
--- a/integration/combination/test_custom_http_api_domains_test.py
+++ b/integration/combination/test_custom_http_api_domains_test.py
@@ -1,7 +1,7 @@
 from unittest.case import skipIf
 
 from integration.config.service_names import CUSTOM_DOMAIN
-from integration.helpers.base_internal_test import BaseInternalTest
+from integration.helpers.base_internal_test import CUSTOM_DOMAIN_TOP_LEVEL, BaseInternalTest
 from integration.helpers.base_test import nonblocking
 from integration.helpers.resource import current_region_not_included
 
@@ -26,7 +26,7 @@ def test_custom_http_api_domains_regional(self):
         if "FeatureToggle" in self.pipeline_prefix:
             self.assertEqual("httpapi.ftl.sam-gamma-regional.com", result["DomainName"])
         else:
-            self.assertEqual("httpapi.sam-gamma-regional.com", result["DomainName"])
+            self.assertEqual(f"httpapi-sam-gamma-regional.{CUSTOM_DOMAIN_TOP_LEVEL}", result["DomainName"])
 
         mtls_auth_config = result["MutualTlsAuthentication"]
         self.assertEqual(self.file_to_s3_uri_map["MTLSCert.pem"]["uri"], mtls_auth_config["TruststoreUri"])
diff --git a/integration/combination/test_custom_rest_api_domains.py b/integration/combination/test_custom_rest_api_domains.py
index 26b8a7176..e931f7245 100644
--- a/integration/combination/test_custom_rest_api_domains.py
+++ b/integration/combination/test_custom_rest_api_domains.py
@@ -1,7 +1,7 @@
 from unittest.case import skipIf
 
 from integration.config.service_names import CUSTOM_DOMAIN
-from integration.helpers.base_internal_test import BaseInternalTest
+from integration.helpers.base_internal_test import CUSTOM_DOMAIN_TOP_LEVEL, BaseInternalTest
 from integration.helpers.base_test import nonblocking
 from integration.helpers.resource import current_region_not_included
 
@@ -25,7 +25,7 @@ def test_custom_rest_api_domains_edge(self):
         if "FeatureToggle" in self.pipeline_prefix:
             self.assertEqual("ftl.sam-gamma-edge.com", result["domainName"])
         else:
-            self.assertEqual("sam-gamma-edge.com", result["domainName"])
+            self.assertEqual(f"sam-gamma-edge.{CUSTOM_DOMAIN_TOP_LEVEL}", result["domainName"])
 
         end_point_config = result["endpointConfiguration"]
         end_point_types = end_point_config["types"]
@@ -46,7 +46,7 @@ def test_custom_rest_api_domains_regional(self):
         if "FeatureToggle" in self.pipeline_prefix:
             self.assertEqual("ftl.sam-gamma-regional.com", result["domainName"])
         else:
-            self.assertEqual("sam-gamma-regional.com", result["domainName"])
+            self.assertEqual(f"sam-gamma-regional.{CUSTOM_DOMAIN_TOP_LEVEL}", result["domainName"])
 
         self.assertEqual("TLS_1_2", result["securityPolicy"])
 
diff --git a/integration/helpers/base_internal_test.py b/integration/helpers/base_internal_test.py
index 44be48c5a..0651ca21e 100644
--- a/integration/helpers/base_internal_test.py
+++ b/integration/helpers/base_internal_test.py
@@ -4,6 +4,8 @@
 
 from integration.helpers.base_test import BaseTest
 
+CUSTOM_DOMAIN_TOP_LEVEL = "tooling.lambda.aws.dev"
+
 
 class BaseInternalTest(BaseTest):
     """
diff --git a/integration/resources/expected/combination/api_with_custom_domains_edge.json b/integration/resources/expected/combination/api_with_custom_domains_edge.json
index ff3d53996..2fee6e3bc 100644
--- a/integration/resources/expected/combination/api_with_custom_domains_edge.json
+++ b/integration/resources/expected/combination/api_with_custom_domains_edge.json
@@ -1,6 +1,6 @@
 [
   {
-    "LogicalResourceId": "RecordSetGroup1b7eeb359e",
+    "LogicalResourceId": "RecordSetGroup303b65d470",
     "ResourceType": "AWS::Route53::RecordSetGroup"
   },
   {
@@ -8,7 +8,7 @@
     "ResourceType": "AWS::ApiGateway::Deployment"
   },
   {
-    "LogicalResourceId": "ApiGatewayDomainName1101a94567",
+    "LogicalResourceId": "ApiGatewayDomainNameed93f7bdb0",
     "ResourceType": "AWS::ApiGateway::DomainName"
   },
   {
diff --git a/integration/resources/expected/combination/api_with_custom_domains_regional.json b/integration/resources/expected/combination/api_with_custom_domains_regional.json
index eec0647ef..bbb996283 100644
--- a/integration/resources/expected/combination/api_with_custom_domains_regional.json
+++ b/integration/resources/expected/combination/api_with_custom_domains_regional.json
@@ -16,7 +16,7 @@
     "ResourceType": "AWS::ApiGateway::RestApi"
   },
   {
-    "LogicalResourceId": "RecordSetGroupddfc299be2",
+    "LogicalResourceId": "RecordSetGroup303b65d470",
     "ResourceType": "AWS::Route53::RecordSetGroup"
   },
   {
@@ -28,7 +28,7 @@
     "ResourceType": "AWS::ApiGateway::BasePathMapping"
   },
   {
-    "LogicalResourceId": "ApiGatewayDomainName7898169271",
+    "LogicalResourceId": "ApiGatewayDomainNamec65e226806",
     "ResourceType": "AWS::ApiGateway::DomainName"
   },
   {
diff --git a/integration/resources/expected/combination/api_with_custom_domains_regional_ownership_verification.json b/integration/resources/expected/combination/api_with_custom_domains_regional_ownership_verification.json
index fec74ff5e..a5bfc9ae7 100644
--- a/integration/resources/expected/combination/api_with_custom_domains_regional_ownership_verification.json
+++ b/integration/resources/expected/combination/api_with_custom_domains_regional_ownership_verification.json
@@ -16,7 +16,7 @@
     "ResourceType": "AWS::ApiGateway::RestApi"
   },
   {
-    "LogicalResourceId": "RecordSetGroupddfc299be2",
+    "LogicalResourceId": "RecordSetGroup303b65d470",
     "ResourceType": "AWS::Route53::RecordSetGroup"
   },
   {
@@ -28,7 +28,7 @@
     "ResourceType": "AWS::ApiGateway::BasePathMapping"
   },
   {
-    "LogicalResourceId": "ApiGatewayDomainNamec6418178e6",
+    "LogicalResourceId": "ApiGatewayDomainName468109b572",
     "ResourceType": "AWS::ApiGateway::DomainName"
   },
   {
diff --git a/integration/resources/expected/combination/http_api_with_custom_domains_regional.json b/integration/resources/expected/combination/http_api_with_custom_domains_regional.json
index c069daf32..a5f4eccc8 100644
--- a/integration/resources/expected/combination/http_api_with_custom_domains_regional.json
+++ b/integration/resources/expected/combination/http_api_with_custom_domains_regional.json
@@ -20,7 +20,7 @@
     "ResourceType": "AWS::ApiGatewayV2::Api"
   },
   {
-    "LogicalResourceId": "RecordSetGroupddfc299be2",
+    "LogicalResourceId": "RecordSetGroup303b65d470",
     "ResourceType": "AWS::Route53::RecordSetGroup"
   },
   {
@@ -28,7 +28,7 @@
     "ResourceType": "AWS::ApiGatewayV2::Stage"
   },
   {
-    "LogicalResourceId": "ApiGatewayDomainNameV2e7a0af471b",
+    "LogicalResourceId": "ApiGatewayDomainNameV213a98a57a3",
     "ResourceType": "AWS::ApiGatewayV2::DomainName"
   },
   {
diff --git a/integration/resources/expected/combination/http_api_with_custom_domains_regional_ownership_verification.json b/integration/resources/expected/combination/http_api_with_custom_domains_regional_ownership_verification.json
index a2cfab55a..614bb79b2 100644
--- a/integration/resources/expected/combination/http_api_with_custom_domains_regional_ownership_verification.json
+++ b/integration/resources/expected/combination/http_api_with_custom_domains_regional_ownership_verification.json
@@ -20,7 +20,7 @@
     "ResourceType": "AWS::ApiGatewayV2::Api"
   },
   {
-    "LogicalResourceId": "RecordSetGroupddfc299be2",
+    "LogicalResourceId": "RecordSetGroup303b65d470",
     "ResourceType": "AWS::Route53::RecordSetGroup"
   },
   {
@@ -28,7 +28,7 @@
     "ResourceType": "AWS::ApiGatewayV2::Stage"
   },
   {
-    "LogicalResourceId": "ApiGatewayDomainNameV2804ee5e222",
+    "LogicalResourceId": "ApiGatewayDomainNameV23c498a5924",
     "ResourceType": "AWS::ApiGatewayV2::DomainName"
   },
   {