diff --git a/evaluation/audit.py b/evaluation/audit.py
index 4fe84ac..ccf48e5 100644
--- a/evaluation/audit.py
+++ b/evaluation/audit.py
@@ -31,6 +31,7 @@ class AuditCheck:
     weight: float
     module: str
     arguments: tuple[str, ...]
+    direct_network: bool = False
 
 
 ENGINEERING_CHECKS = (
@@ -69,12 +70,21 @@ SECURITY_CHECKS = (
         "pip_audit",
         (
             "-m", "pip_audit", "--local",
-            "--cache-dir", "evaluation/.cache/pip-audit",
             "--progress-spinner", "off",
         ),
+        direct_network=True,
     ),
 )
 
+_PROXY_ENV_KEYS = (
+    "HTTP_PROXY",
+    "HTTPS_PROXY",
+    "ALL_PROXY",
+    "http_proxy",
+    "https_proxy",
+    "all_proxy",
+)
+
 
 def _case_result(
     *,
@@ -119,23 +129,32 @@ def _tail(text: str, limit: int = 1200) -> str:
     return compact[-limit:] if compact else ""
 
 
+def _subprocess_env(*, direct_network: bool) -> dict[str, str]:
+    env = {
+        **os.environ,
+        "PYTHONUTF8": "1",
+        "PYTHONIOENCODING": "utf-8",
+    }
+    if direct_network:
+        for key in _PROXY_ENV_KEYS:
+            env.pop(key, None)
+    return env
+
+
 def _run(
     arguments: tuple[str, ...],
     *,
     repo_root: Path,
     timeout_s: float,
     evidence_path: Path | None = None,
+    direct_network: bool = False,
 ) -> tuple[bool, str, float]:
     started = time.monotonic()
     try:
         completed = subprocess.run(
             [sys.executable, *arguments],
             cwd=repo_root,
-            env={
-                **os.environ,
-                "PYTHONUTF8": "1",
-                "PYTHONIOENCODING": "utf-8",
-            },
+            env=_subprocess_env(direct_network=direct_network),
             capture_output=True,
             text=True,
             encoding="utf-8",
@@ -305,6 +324,7 @@ def audit_security_repository(
             evidence_path=(
                 evidence_dir / f"{check.id}.txt" if write_evidence else None
             ),
+            direct_network=check.direct_network,
         )
         total_duration += duration
         assertions.append(
diff --git a/tests/test_evaluation.py b/tests/test_evaluation.py
index a6381b6..5dee6c2 100644
--- a/tests/test_evaluation.py
+++ b/tests/test_evaluation.py
@@ -6,9 +6,14 @@ import unittest
 import zipfile
 from io import BytesIO
 from pathlib import Path
+from unittest.mock import patch
 
+from evaluation.audit import (
+    _subprocess_env,
+    audit_repository,
+    audit_security_repository,
+)
 from evaluation.client import EvalClientError, require_safe_base_url
-from evaluation.audit import audit_repository, audit_security_repository
 from evaluation.combine import combine_reports
 from evaluation.inspect_bridge import export_inspect_jsonl
 from evaluation.models import AssertionSpec, EvalConfigError, RunObservation
@@ -135,6 +140,33 @@ class ClientSafetyTests(unittest.TestCase):
 
 
 class ReportTests(unittest.TestCase):
+    def test_direct_audit_environment_ignores_proxy(self):
+        for key in (
+            "HTTP_PROXY",
+            "HTTPS_PROXY",
+            "ALL_PROXY",
+            "http_proxy",
+            "https_proxy",
+            "all_proxy",
+        ):
+            with self.subTest(key=key), patch.dict(
+                "evaluation.audit.os.environ",
+                {key: "http://proxy.example"},
+                clear=True,
+            ):
+                direct_env = _subprocess_env(direct_network=True)
+                inherited_env = _subprocess_env(direct_network=False)
+
+            direct_keys = {item.casefold() for item in direct_env}
+            inherited_by_key = {
+                item.casefold(): value for item, value in inherited_env.items()
+            }
+            self.assertNotIn(key.casefold(), direct_keys)
+            self.assertEqual(
+                inherited_by_key[key.casefold()], "http://proxy.example"
+            )
+            self.assertEqual(direct_env["PYTHONUTF8"], "1")
+
     def test_combine_existing_dimension_reports(self):
         engineering = {
             "suite": {"name": "engineering", "version": "1"},