diff --git a/smoke-test/tests/restli/test_restli_batch_ingestion.py b/smoke-test/tests/restli/test_restli_batch_ingestion.py
index 0e92988ed6470..524f269afe4a8 100644
--- a/smoke-test/tests/restli/test_restli_batch_ingestion.py
+++ b/smoke-test/tests/restli/test_restli_batch_ingestion.py
@@ -1,14 +1,18 @@
 import time
-from typing import List
+import uuid
+from typing import List, Set
 
 import pytest
 
-from datahub.emitter.mce_builder import make_dashboard_urn
+from datahub.emitter.mce_builder import make_dashboard_urn, make_tag_urn
 from datahub.emitter.mcp import MetadataChangeProposalWrapper
+from datahub.metadata.com.linkedin.pegasus2avro.mxe import SystemMetadata
 from datahub.emitter.serialization_helper import pre_json_transform
 from datahub.metadata._schema_classes import MetadataChangeProposalClass
 from datahub.metadata.schema_classes import (
     AuditStampClass,
+    GlobalTagsClass,
+    TagAssociationClass,
     ChangeAuditStampsClass,
     DashboardInfoClass,
 )
@@ -16,13 +20,13 @@
 from tests.restli.restli_test import MetadataChangeProposalInvalidWrapper
 from tests.utils import delete_urns
 
-generated_urns: List[str] = []
+generated_urns: Set[str] = set()
 
 
-@pytest.fixture(scope="module")
+@pytest.fixture(scope="module", autouse=True)
 def ingest_cleanup_data(auth_session, graph_client, request):
     yield
-    delete_urns(graph_client, generated_urns)
+    delete_urns(graph_client, list(generated_urns))
 
 
 def _create_valid_dashboard_mcps() -> List[MetadataChangeProposalClass]:
@@ -53,7 +57,7 @@ def _create_valid_dashboard_mcps() -> List[MetadataChangeProposalClass]:
             aspect=valid_dashboard_info,
         )
         mcps.append(mcp_valid.make_mcp())
-    generated_urns.extend([mcp.entityUrn for mcp in mcps if mcp.entityUrn])
+    generated_urns.update([mcp.entityUrn for mcp in mcps if mcp.entityUrn])
 
     return mcps
 
@@ -80,10 +84,40 @@ def _create_invalid_dashboard_mcp() -> MetadataChangeProposalClass:
         aspectName="dashboardInfo",
         aspect=invalid_dashboard_info,
     )
-    generated_urns.append(mcp_invalid.entityUrn) if mcp_invalid.entityUrn else None
+    generated_urns.update(mcp_invalid.entityUrn) if mcp_invalid.entityUrn else None
     return mcp_invalid.make_mcp()
 
 
+def _create_valid_duplicate_mcps() -> List[MetadataChangeProposalClass]:
+    mcps = []
+    num_valid_mcp = 20
+
+    dashboard_urn = make_dashboard_urn(
+        platform="looker", name=f"dummy-test-invalid-duplicate-{uuid.uuid4()}"
+    )
+
+    tag_urn = make_tag_urn(tag=f"testTag-{uuid.uuid4()}")
+    tag_association = TagAssociationClass(tag=tag_urn, context="test")
+    global_tags = GlobalTagsClass(tags=[tag_association])
+
+    for i in range(num_valid_mcp):
+        mcp_valid = MetadataChangeProposalWrapper(entityUrn=dashboard_urn, aspect=global_tags)
+        mcps.append(mcp_valid.make_mcp())
+    generated_urns.update([mcp.entityUrn for mcp in mcps if mcp.entityUrn])
+
+    return mcps
+
+
+def test_restli_batch_ingestion_duplicate_tags_sync(graph_client):
+    mcps = _create_valid_duplicate_mcps()
+    ret = graph_client.emit_mcps(mcps, async_flag=False)
+    assert ret >= 0
+
+    mcps = _create_valid_duplicate_mcps()
+    ret = graph_client.emit_mcps(mcps, async_flag=True)
+    assert ret >= 0
+
+
 def test_restli_batch_ingestion_sync(graph_client):
     # Positive Test (all valid MetadataChangeProposal)
     mcps = _create_valid_dashboard_mcps()