diff --git a/.azure-pipelines/run-test-elastictest-template.yml b/.azure-pipelines/run-test-elastictest-template.yml
index 5b52a39a9fc..147cc78fb2c 100644
--- a/.azure-pipelines/run-test-elastictest-template.yml
+++ b/.azure-pipelines/run-test-elastictest-template.yml
@@ -142,6 +142,20 @@ parameters:
     type: string
     default: ""
 
+  - name: MIXED_PTF_IMAGE_BRANCHES
+    type: object
+    default:
+      - 201803
+      - 201807
+      - 201811
+      - 201911
+      - 202211
+      - 202012
+      - 202205
+      - 202305
+      - 202311
+      - 202405
+
 steps:
   - ${{ if not(contains(variables['BUILD.REPOSITORY.NAME'], 'sonic-mgmt')) }}:
       - script: |
@@ -191,6 +205,15 @@ steps:
         pip install PyYAML
 
         rm -f new_test_plan_id.txt
+        PTF_IMAGETAG="--ptf_imagetag=py3only"
+        for old_branch in ${{ parameters.MIXED_PTF_IMAGE_BRANCHES }}
+        do
+          if [ $old_branch == "${{ parameters.MGMT_BRANCH }}" ]
+          then
+            PTF_IMAGETAG="--ptf_imagetag=internal"
+            break
+          fi
+        done
 
         python ./.azure-pipelines/test_plan.py create \
         -t ${{ parameters.TOPOLOGY }} \
@@ -202,7 +225,7 @@ steps:
         --kvm-build-id $(KVM_BUILD_ID) \
         --kvm-image-branch "${{ parameters.KVM_IMAGE_BRANCH }}" \
         --deploy-mg-extra-params="${{ parameters.DEPLOY_MG_EXTRA_PARAMS }}" \
-        --common-extra-params="${{ parameters.COMMON_EXTRA_PARAMS }}" \
+        --common-extra-params="${{ parameters.COMMON_EXTRA_PARAMS }} ${PTF_IMAGETAG}" \
         --vm-type ${{ parameters.VM_TYPE }} --num-asic ${{ parameters.NUM_ASIC }} \
         --image_url ${{ parameters.IMAGE_URL }} \
         --upgrade-image-param="${{ parameters.UPGRADE_IMAGE_PARAM }}" \