diff --git a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/custom_eq_avg_bytes_fired.ts b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/custom_eq_avg_bytes_fired.ts
index 4163c85c849f4..5eb9f4cc21738 100644
--- a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/custom_eq_avg_bytes_fired.ts
+++ b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/custom_eq_avg_bytes_fired.ts
@@ -249,7 +249,7 @@ export default function ({ getService }: DeploymentAgnosticFtrProviderContext) {
           docCountTarget: 1,
         });
 
-        const { protocol, hostname, port } = kbnTestConfig.getUrlParts();
+        const { protocol, hostname, port } = kbnTestConfig.getUrlPartsWithStrippedDefaultPort();
         expect(resp.hits.hits[0]._source?.ruleType).eql('observability.rules.custom_threshold');
         expect(resp.hits.hits[0]._source?.alertDetailsUrl).eql(
           `${protocol}://${hostname}${port ? `:${port}` : ''}/app/observability/alerts/${alertId}`
diff --git a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/documents_count_fired.ts b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/documents_count_fired.ts
index f9d7067f0e0a4..97451b1930afc 100644
--- a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/documents_count_fired.ts
+++ b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/documents_count_fired.ts
@@ -247,7 +247,7 @@ export default function ({ getService }: DeploymentAgnosticFtrProviderContext) {
           docCountTarget: 1,
         });
 
-        const { protocol, hostname, port } = kbnTestConfig.getUrlParts();
+        const { protocol, hostname, port } = kbnTestConfig.getUrlPartsWithStrippedDefaultPort();
 
         expect(resp.hits.hits[0]._source?.ruleType).eql('observability.rules.custom_threshold');
         expect(resp.hits.hits[0]._source?.alertDetailsUrl).eql(
diff --git a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/group_by_fired.ts b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/group_by_fired.ts
index 3a554a16c5cec..457b8bdceae44 100644
--- a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/group_by_fired.ts
+++ b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/group_by_fired.ts
@@ -272,7 +272,7 @@ export default function ({ getService }: DeploymentAgnosticFtrProviderContext) {
         const resp = await alertingApi.waitForDocumentInIndex<ActionDocument>({
           indexName: ALERT_ACTION_INDEX,
         });
-        const { protocol, hostname, port } = kbnTestConfig.getUrlParts();
+        const { protocol, hostname, port } = kbnTestConfig.getUrlPartsWithStrippedDefaultPort();
 
         expect(resp.hits.hits[0]._source?.ruleType).eql('observability.rules.custom_threshold');
         expect(resp.hits.hits[0]._source?.alertDetailsUrl).eql(
diff --git a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/p99_pct_fired.ts b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/p99_pct_fired.ts
index 743bca2683895..5d6cfb49f86f0 100644
--- a/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/p99_pct_fired.ts
+++ b/x-pack/test/api_integration/deployment_agnostic/apis/observability/alerting/custom_threshold/p99_pct_fired.ts
@@ -244,7 +244,7 @@ export default function ({ getService }: DeploymentAgnosticFtrProviderContext) {
           docCountTarget: 1,
         });
 
-        const { protocol, hostname, port } = kbnTestConfig.getUrlParts();
+        const { protocol, hostname, port } = kbnTestConfig.getUrlPartsWithStrippedDefaultPort();
         expect(resp.hits.hits[0]._source?.ruleType).eql('observability.rules.custom_threshold');
         expect(resp.hits.hits[0]._source?.alertDetailsUrl).eql(
           `${protocol}://${hostname}${port ? `:${port}` : ''}/app/observability/alerts/${alertId}`