diff --git a/python/sglang/multimodal_gen/test/server/gpu_cases.py b/python/sglang/multimodal_gen/test/server/gpu_cases.py
index 042ee18fc..c7dad43f8 100644
--- a/python/sglang/multimodal_gen/test/server/gpu_cases.py
+++ b/python/sglang/multimodal_gen/test/server/gpu_cases.py
@@ -1179,7 +1179,7 @@ def _make_5090_h3_consumer_budget_case() -> DiffusionTestCase:
                 "--layerwise-offload-components",
                 "dit,text_encoder,vae",
                 "--layerwise-resident-layers",
-                "video_vae=24",
+                "video_vae=36",
             ],
             env_vars={
                 "SGLANG_DIFFUSION_TEST_FORCE_HOST_AVAILABLE_GIB": "32",
@@ -1212,6 +1212,7 @@ def _make_5090_h3_consumer_budget_case() -> DiffusionTestCase:
             },
         ),
         run_perf_check=True,
+        perf_repeat_requests=2,
         run_consistency_check=False,
         run_component_accuracy_check=False,
         run_models_api_check=False,
diff --git a/python/sglang/multimodal_gen/test/server/perf_baselines/5090.json b/python/sglang/multimodal_gen/test/server/perf_baselines/5090.json
index 04ab0907e..43574f50b 100644
--- a/python/sglang/multimodal_gen/test/server/perf_baselines/5090.json
+++ b/python/sglang/multimodal_gen/test/server/perf_baselines/5090.json
@@ -138,7 +138,7 @@
             "stages_ms": {
                 "MiniMaxH3TextEncodingStage": 11900.0,
                 "MiniMaxH3DenoisingStage": 76100.0,
-                "MiniMaxH3DecodingStage": 26550.0
+                "MiniMaxH3DecodingStage": 13000.0
             },
             "denoise_step_ms": {
                 "0": 14000.0,
@@ -150,12 +150,12 @@
                 "6": 14000.0,
                 "7": 14000.0
             },
-            "expected_e2e_ms": 125000.0,
+            "expected_e2e_ms": 105000.0,
             "expected_avg_denoise_ms": 12000.0,
             "expected_median_denoise_ms": 11000.0,
             "load_peak_vram_mb": 6000.0,
             "runtime_peak_vram_mb": 12288.0,
-            "estimated_full_test_time_s": 900.0
+            "estimated_full_test_time_s": 1050.0
         }
     }
 }
diff --git a/python/sglang/multimodal_gen/test/server/test_server_common.py b/python/sglang/multimodal_gen/test/server/test_server_common.py
index 78278c22e..3a42fab57 100644
--- a/python/sglang/multimodal_gen/test/server/test_server_common.py
+++ b/python/sglang/multimodal_gen/test/server/test_server_common.py
@@ -1546,14 +1546,18 @@ Pinned revision used by this check: {SGL_TEST_FILES_CI_DATA_REVISION}
             sampling_params=case.sampling_params,
         )
 
-        # Single generation - output is reused for both validations
+        # Generation - output of the last request is used for both validations.
+        # perf_repeat_requests > 1 asserts a warm second request meets the same
+        # baselines as the first: residency or courier state leaking between
+        # requests shows up here as degradation or an OOM.
         is_realtime_case = case.sampling_params.realtime_num_chunks is not None
-        perf_record, content = self.run_and_collect(
-            diffusion_server,
-            case.id,
-            generate_fn,
-            collect_perf=not is_gt_gen_mode and not is_realtime_case,
-        )
+        for _ in range(max(1, case.perf_repeat_requests)):
+            perf_record, content = self.run_and_collect(
+                diffusion_server,
+                case.id,
+                generate_fn,
+                collect_perf=not is_gt_gen_mode and not is_realtime_case,
+            )
 
         if is_gt_gen_mode:
             # GT generation mode: save output and skip all validations/tests
diff --git a/python/sglang/multimodal_gen/test/server/testcase_configs.py b/python/sglang/multimodal_gen/test/server/testcase_configs.py
index 42544039a..1bee1dd8c 100644
--- a/python/sglang/multimodal_gen/test/server/testcase_configs.py
+++ b/python/sglang/multimodal_gen/test/server/testcase_configs.py
@@ -295,6 +295,12 @@ class DiffusionTestCase:
     server_args: DiffusionServerArgs
     sampling_params: DiffusionSamplingParams | None = None
     run_perf_check: bool = True
+    # Send the request this many times in one server session; performance and
+    # consistency are validated on the last one. >1 asserts a warm second
+    # request meets the same baselines -- a leak in residency arming, courier
+    # in-flight tracking, or host copies shows up as the second request
+    # degrading or dying.
+    perf_repeat_requests: int = 1
     run_consistency_check: bool = True
     run_component_accuracy_check: bool = True
     run_models_api_check: bool = True