diff --git a/services/core-ai/tests/QUALITY_TESTS.md b/services/core-ai/tests/QUALITY_TESTS.md
index b18c400..9e27e1e 100644
--- a/services/core-ai/tests/QUALITY_TESTS.md
+++ b/services/core-ai/tests/QUALITY_TESTS.md
@@ -73,6 +73,12 @@ pytest tests/test_ai_flow_quality.py -k regression -v
 - **Expected**: Multiple tool calls (get_current_time × 2, synthesis)
 - **Performance Target**: < 30s
 
+### Scenario 6: DNS Lookup (OpenAPI Discovery)
+- **Query**: "What are the A records for github.com? Use the core-api DNS lookup tool."
+- **Expected**: Uses DNS lookup tool discovered via OpenAPI from core-api
+- **Performance Target**: < 15s
+- **Purpose**: Tests OpenAPI tool discovery and infrastructure integration
+
 ## Report Format
 
 Reports are saved in two formats:
diff --git a/services/core-ai/tests/test_ai_flow_quality.py b/services/core-ai/tests/test_ai_flow_quality.py
index 53b8ab5..1f09b06 100644
--- a/services/core-ai/tests/test_ai_flow_quality.py
+++ b/services/core-ai/tests/test_ai_flow_quality.py
@@ -394,6 +394,30 @@ async def test_scenario5_multi_tool_reasoning():
         print(f"✓ Multi-tool query: {result['total_time']:.2f}s")
 
 
+@pytest.mark.asyncio
+async def test_scenario6_dns_lookup():
+    """
+    Scenario 6: DNS Lookup
+
+    Expected: Uses DNS lookup tool from core-api (discovered via OpenAPI)
+    Performance target: < 15s
+    """
+    async with AIFlowTester() as tester:
+        result = await tester.chat(
+            "What are the A records for github.com? Use the core-api DNS lookup tool."
+        )
+
+        tester.assert_response_quality(
+            result,
+            expected_keywords=["github", "record"],
+            min_length=30,
+            max_time=15.0
+        )
+
+        assert result["success"], "Request failed"
+        print(f"✓ DNS lookup query: {result['total_time']:.2f}s")
+
+
 @pytest.mark.asyncio
 async def test_tools_disabled():
     """
@@ -537,6 +561,11 @@ async def run_full_quality_check():
             "query": "Get current time in NYC and Tokyo, calculate difference",
             "test": test_scenario5_multi_tool_reasoning
         },
+        {
+            "name": "Scenario 6: DNS Lookup",
+            "query": "What are the A records for github.com? Use the core-api DNS lookup tool.",
+            "test": test_scenario6_dns_lookup
+        },
     ]
 
     print("\n" + "=" * 80)