diff --git a/.buildkite/test-merge.yml b/.buildkite/test-merge.yml
index c08d3f333..130e9e59c 100644
--- a/.buildkite/test-merge.yml
+++ b/.buildkite/test-merge.yml
@@ -172,7 +172,7 @@ steps:
               pytest -s -v tests/e2e/online_serving/test_qwen3_tts_customvoice.py tests/e2e/offline_inference/test_qwen3_tts_customvoice.py -m 'advanced_model and cuda' --run-level 'advanced_model'
             "
         agents:
-          queue: "gpu_1_queue"
+          queue: "gpu_4_queue"
         plugins:
           - docker#v5.2.0:
               image: public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
@@ -193,7 +193,7 @@ steps:
               pytest -s -v tests/e2e/online_serving/test_qwen3_tts_base.py tests/e2e/offline_inference/test_qwen3_tts_base.py -m 'advanced_model and cuda' --run-level 'advanced_model'
             "
         agents:
-          queue: "gpu_1_queue"
+          queue: "gpu_4_queue"
         plugins:
           - docker#v5.2.0:
               image: public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
diff --git a/.buildkite/test-nightly.yml b/.buildkite/test-nightly.yml
index 66e03d5c7..5308957fb 100644
--- a/.buildkite/test-nightly.yml
+++ b/.buildkite/test-nightly.yml
@@ -388,7 +388,7 @@ steps:
                   - image: 936637512419.dkr.ecr.us-west-2.amazonaws.com/vllm-ci-pull-through-cache/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
                     resources:
                       limits:
-                        nvidia.com/gpu: 1
+                        nvidia.com/gpu: 2
                     volumeMounts:
                       - name: devshm
                         mountPath: /dev/shm
diff --git a/.buildkite/test-ready.yml b/.buildkite/test-ready.yml
index 0fc174d8b..a9aea9f62 100644
--- a/.buildkite/test-ready.yml
+++ b/.buildkite/test-ready.yml
@@ -303,7 +303,7 @@ steps:
               pytest -s -v tests/e2e/online_serving/test_qwen3_tts_customvoice.py -m 'core_model' --run-level 'core_model'
             "
         agents:
-          queue: "gpu_1_queue"
+          queue: "gpu_4_queue"
         plugins:
           - docker#v5.2.0:
               image: public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
@@ -326,7 +326,7 @@ steps:
               pytest -s -v tests/e2e/online_serving/test_qwen3_tts_base.py -m 'core_model' --run-level 'core_model'
             "
         agents:
-          queue: "gpu_1_queue"
+          queue: "gpu_4_queue"
         plugins:
           - docker#v5.2.0:
               image: public.ecr.aws/q9t5s3a7/vllm-ci-test-repo:$BUILDKITE_COMMIT
diff --git a/benchmarks/build_dataset/seed_tts_design/en/meta.lst b/benchmarks/build_dataset/seed_tts_design/en/meta.lst
index 7e364c2e5..c1665f597 100644
--- a/benchmarks/build_dataset/seed_tts_design/en/meta.lst
+++ b/benchmarks/build_dataset/seed_tts_design/en/meta.lst
@@ -18,3 +18,13 @@ vd017|||The quarterly results exceed expectations across all major metrics.|A sh
 vd018|||Chapter one. The morning sun filtered gently through the forest canopy.|A smooth, rich male audiobook narrator voice, expressive and engaging.
 vd019|||To be or not to be, that is the question.|A theatrical female voice, dramatic and expressive, stage projection quality.
 vd020|||And that is all for tonight. Stay well out there, everyone.|A warm, velvety male late-night radio DJ voice, smooth and intimate.
+vd021|||Please fasten your seatbelts; we will be experiencing some turbulence shortly.|A calm, professional female flight attendant voice, reassuring and clear.
+vd022|||The fossil record suggests these creatures lived more than sixty million years ago.|A measured male documentary narrator voice, scientific and curious.
+vd023|||Hey kiddo, did you finish your homework before dinner today?|A gentle, caring father voice, warm and slightly tired after a long day.
+vd024|||Live from courtside, the home team has just taken a commanding lead.|A high-energy male sports broadcaster, urgent and engaged.
+vd025|||Please remain on the line while I transfer you to the next available agent.|A polite, neutral female call-center voice, professional and patient.
+vd026|||I have a dream that one day this nation will rise up and live out the true meaning of its creed.|A powerful, resonant male orator voice, slow and impassioned.
+vd027|||Mama always said life was like a box of chocolates; you never know what you're gonna get.|A folksy male voice with a Southern American accent, warm and reflective.
+vd028|||Ahoy there, matey! Hoist the colors and prepare to set sail.|A theatrical pirate male voice, gruff and boisterous.
+vd029|||Ladies and gentlemen, please welcome to the stage our keynote speaker.|A polished female event MC voice, gracious and articulate.
+vd030|||Once you've completed the form, click submit and we'll review it within two business days.|A friendly female product-onboarding voice, encouraging and clear.
diff --git a/benchmarks/build_dataset/seed_tts_smoke/en/meta.lst b/benchmarks/build_dataset/seed_tts_smoke/en/meta.lst
index afe4bc8ab..5c50e0c11 100644
--- a/benchmarks/build_dataset/seed_tts_smoke/en/meta.lst
+++ b/benchmarks/build_dataset/seed_tts_smoke/en/meta.lst
@@ -18,3 +18,13 @@ smoke017|||In the distance, the mountains were shrouded in thick morning fog.
 smoke018|||Our company reported record revenue for the fourth quarter of the fiscal year.
 smoke019|||She explained the new policy in detail during the staff meeting this morning.
 smoke020|||The children laughed and played in the garden until the sun began to set.
+smoke021|||A long line of cars stretched along the coastal highway after the lighthouse opened.
+smoke022|||The chef recommended the seared scallops with a lemon butter sauce as the special.
+smoke023|||Our quarterly engineering review begins promptly at two in the afternoon on Thursday.
+smoke024|||Despite the heavy rain, the marathon runners kept a steady pace through downtown.
+smoke025|||She finished the crossword puzzle in under fifteen minutes while sipping her tea.
+smoke026|||The new release adds streaming output, faster startup, and better error reporting.
+smoke027|||His grandfather taught him how to whittle small wooden birds from cedar offcuts.
+smoke028|||Travelers were advised to check the timetable since trains were running on a holiday schedule.
+smoke029|||The startup launched a public beta after eighteen months of closed development.
+smoke030|||At night the desert sky filled with stars so bright the Milky Way was clearly visible.
diff --git a/tests/dfx/perf/tests/test_tts.json b/tests/dfx/perf/tests/test_tts.json
index fbd09d219..ccf86e6ca 100644
--- a/tests/dfx/perf/tests/test_tts.json
+++ b/tests/dfx/perf/tests/test_tts.json
@@ -2,16 +2,19 @@
   {
     "test_name": "test_qwen3_tts_base",
     "server_params": {
-      "model": "Qwen/Qwen3-TTS-12Hz-1.7B-Base"
+      "model": "Qwen/Qwen3-TTS-12Hz-1.7B-Base",
+      "stage_overrides": {
+        "1": {"devices": "1"}
+      }
     },
     "benchmark_params": [
       {
         "task": "voice_clone",
         "eval_phase": "latency",
-        "enabled": false,
         "dataset_name": "seed-tts",
         "backend": "openai-audio-speech",
         "endpoint": "/v1/audio/speech",
+        "dataset_path": "linyueqian/seed-tts-eval-subset",
         "num_prompts": [20],
         "max_concurrency": [1],
         "seed_tts_locale": "en",
@@ -24,18 +27,18 @@
       {
         "task": "voice_clone",
         "eval_phase": "throughput",
-        "enabled": false,
         "dataset_name": "seed-tts",
         "backend": "openai-audio-speech",
         "endpoint": "/v1/audio/speech",
-        "num_prompts": [80],
-        "max_concurrency": [8],
+        "dataset_path": "linyueqian/seed-tts-eval-subset",
+        "num_prompts": [80, 128, 256],
+        "max_concurrency": [8, 64, 128],
         "seed_tts_locale": "en",
         "percentile-metrics": "ttft,e2el,audio_rtf,audio_ttfp,audio_duration",
         "baseline": {
-          "median_audio_ttfp_ms": [3500],
-          "median_audio_rtf": [0.75],
-          "audio_throughput": [10.0]
+          "median_audio_ttfp_ms": [3500, 7000, 12000],
+          "median_audio_rtf": [0.75, 1.5, 2.5],
+          "audio_throughput": [10.0, 40.0, 50.0]
         }
       },
       {
@@ -45,6 +48,7 @@
         "dataset_name": "seed-tts",
         "backend": "openai-audio-speech",
         "endpoint": "/v1/audio/speech",
+        "dataset_path": "linyueqian/seed-tts-eval-subset",
         "num_prompts": [200],
         "max_concurrency": [4],
         "seed_tts_locale": "en",
@@ -59,7 +63,10 @@
   {
     "test_name": "test_qwen3_tts_customvoice",
     "server_params": {
-      "model": "Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice"
+      "model": "Qwen/Qwen3-TTS-12Hz-1.7B-CustomVoice",
+      "stage_overrides": {
+        "1": {"devices": "1"}
+      }
     },
     "benchmark_params": [
       {
@@ -86,15 +93,15 @@
         "backend": "openai-audio-speech",
         "endpoint": "/v1/audio/speech",
         "dataset_path": "benchmarks/build_dataset/seed_tts_smoke",
-        "num_prompts": [80],
-        "max_concurrency": [8],
+        "num_prompts": [80, 128, 256],
+        "max_concurrency": [8, 64, 128],
         "seed_tts_locale": "en",
         "extra_body": {"voice": "Vivian", "language": "English", "task_type": "CustomVoice"},
         "percentile-metrics": "ttft,e2el,audio_rtf,audio_ttfp,audio_duration",
         "baseline": {
-          "median_audio_ttfp_ms": [1500],
-          "median_audio_rtf": [0.30],
-          "audio_throughput": [30.0]
+          "median_audio_ttfp_ms": [1500, 3000, 5500],
+          "median_audio_rtf": [0.30, 0.60, 1.0],
+          "audio_throughput": [30.0, 100.0, 120.0]
         }
       },
       {
@@ -157,15 +164,15 @@
         "backend": "openai-audio-speech",
         "endpoint": "/v1/audio/speech",
         "dataset_path": "benchmarks/build_dataset/seed_tts_design",
-        "num_prompts": [80],
-        "max_concurrency": [8],
+        "num_prompts": [80, 128, 256],
+        "max_concurrency": [8, 64, 128],
         "seed_tts_locale": "en",
         "extra_body": {"task_type": "VoiceDesign", "language": "English"},
         "percentile-metrics": "ttft,e2el,audio_rtf,audio_ttfp,audio_duration",
         "baseline": {
-          "median_audio_ttfp_ms": [1500],
-          "median_audio_rtf": [0.35],
-          "audio_throughput": [25.0]
+          "median_audio_ttfp_ms": [1500, 3500, 6000],
+          "median_audio_rtf": [0.35, 0.70, 1.2],
+          "audio_throughput": [25.0, 80.0, 100.0]
         }
       },
       {