Enable SGLANG_ENABLE_SPEC_V2 for nightly speculative decoding tests (#18719)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

python/sglang/test/accuracy_test_runner.py

@@ -97,6 +97,7 @@ def _run_simple_eval(
             base_url,
             other_args=model.extra_args,
             timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            env=model.env,
         )
 
         args = SimpleNamespace(
@@ -165,6 +166,7 @@ def _run_few_shot_eval(
             base_url,
             other_args=model.extra_args,
             timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            env=model.env,
         )
 
         args = SimpleNamespace(

python/sglang/test/nightly_utils.py

@@ -229,6 +229,7 @@ class NightlyBenchmarkRunner:
         extra_bench_args: Optional[List[str]] = None,
         enable_profile: bool = True,
         timeout: Optional[int] = None,
+        env: Optional[dict] = None,
     ) -> Tuple[List[BenchmarkResult], bool, Optional[float]]:
         """Run a complete benchmark for a single model with server management.
 
@@ -249,6 +250,7 @@ class NightlyBenchmarkRunner:
             extra_bench_args: Extra arguments for the benchmark command
             enable_profile: Whether to enable profiling (default True for NVIDIA)
             timeout: Optional timeout for server launch (defaults to DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH)
+            env: Environment dict for subprocess
 
         Returns:
             Tuple of (list of BenchmarkResult objects, success_bool, avg_spec_accept_length or None)
@@ -265,6 +267,7 @@ class NightlyBenchmarkRunner:
             timeout=(
                 timeout if timeout is not None else DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH
             ),
+            env=env,
         )
 
         try:

python/sglang/test/performance_test_runner.py

@@ -79,6 +79,7 @@ def run_performance_test(
             other_args=model.extra_args,
             variant=model.variant or "",
             extra_bench_args=extra_bench_args,
+            env=model.env,
         )
 
         if success and results:

python/sglang/test/test_utils.py

@@ -855,7 +855,9 @@ def popen_launch_server(
     if env is None:
         env = os.environ.copy()
     else:
-        env = env.copy()
+        merged = os.environ.copy()
+        merged.update(env)
+        env = merged
 
     # Store per-run marker path for potential invalidation
     per_run_marker_path = None