diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 56809c4756c..a02dfce4e2a 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -151,6 +151,31 @@ stages:
         KVM_IMAGE_BRANCH: $(BUILD_BRANCH)
         MGMT_BRANCH: "master"
 
+  - job: impacted_area_t1_lag_elastictest
+    displayName: "impacted-area-kvmtest-t1-lag by Elastictest - optional"
+    dependsOn: get_impacted_area
+    condition: contains(dependencies.get_impacted_area.outputs['SetVariableTask.PR_CHECKERS'], 't1')
+    variables:
+      TEST_SCRIPTS: $[ dependencies.get_impacted_area.outputs['SetVariableTask.TEST_SCRIPTS'] ]
+    timeoutInMinutes: 240
+    continueOnError: true
+    pool: sonic-ubuntu-1c
+    steps:
+      - template: .azure-pipelines/impacted_area_testing/calculate-instance-numbers.yml
+        parameters:
+          TOPOLOGY: t1
+          BUILD_BRANCH: $(BUILD_BRANCH)
+
+      - template: .azure-pipelines/run-test-elastictest-template.yml
+        parameters:
+          TOPOLOGY: t1-lag
+          SCRIPTS: $(SCRIPTS)
+          MIN_WORKER: $(INSTANCE_NUMBER)
+          MAX_WORKER: $(INSTANCE_NUMBER)
+          KVM_IMAGE_BRANCH: $(BUILD_BRANCH)
+          MGMT_BRANCH: $(BUILD_BRANCH)
+          STOP_ON_FAILURE: "False"
+
   - job: dualtor_elastictest
     displayName: "kvmtest-dualtor-t0 by Elastictest"
     timeoutInMinutes: 240