diff --git a/tests/verify_conformance_suite.py b/tests/verify_conformance_suite.py
index cd900ab..b180b16 100644
--- a/tests/verify_conformance_suite.py
+++ b/tests/verify_conformance_suite.py
@@ -3,7 +3,6 @@ import json
 import shutil
 import subprocess
 import sys
-import tempfile
 from pathlib import Path
 
 
@@ -54,33 +53,34 @@ def main() -> None:
     assert output_md.exists(), output_md
     assert "Runtime Conformance Matrix" in output_md.read_text(encoding="utf-8")
 
-    with tempfile.TemporaryDirectory(prefix="renamed-conformance-root-") as temp_root:
-        renamed_root = Path(temp_root) / "checkout-alias"
-        shutil.copytree(
-            ROOT,
-            renamed_root,
-            ignore=shutil.ignore_patterns(".git", ".previews", "dist", "__pycache__", ".pytest_cache", "tmp*"),
-        )
-        renamed_proc = subprocess.run(
-            [
-                sys.executable,
-                str(SCRIPT),
-                str(renamed_root),
-                "--output-json",
-                str(tmp_root / "renamed_conformance_matrix.json"),
-                "--output-md",
-                str(tmp_root / "renamed_conformance_matrix.md"),
-            ],
-            cwd=ROOT,
-            capture_output=True,
-            text=True,
-            check=True,
-        )
-        renamed_payload = json.loads(renamed_proc.stdout)
-        assert renamed_payload["ok"], renamed_payload
-        assert renamed_payload["summary"]["pass_count"] == 5, renamed_payload
-        warnings = [warning for target in renamed_payload["targets"] for warning in target["warnings"]]
-        assert any("source checkout directory differs" in warning for warning in warnings), renamed_payload
+    renamed_workspace = tmp_root / "renamed-conformance-root"
+    shutil.rmtree(renamed_workspace, ignore_errors=True)
+    renamed_root = renamed_workspace / "checkout-alias"
+    shutil.copytree(
+        ROOT,
+        renamed_root,
+        ignore=shutil.ignore_patterns(".git", ".previews", "dist", "__pycache__", ".pytest_cache", "tmp*"),
+    )
+    renamed_proc = subprocess.run(
+        [
+            sys.executable,
+            str(SCRIPT),
+            str(renamed_root),
+            "--output-json",
+            str(tmp_root / "renamed_conformance_matrix.json"),
+            "--output-md",
+            str(tmp_root / "renamed_conformance_matrix.md"),
+        ],
+        cwd=ROOT,
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    renamed_payload = json.loads(renamed_proc.stdout)
+    assert renamed_payload["ok"], renamed_payload
+    assert renamed_payload["summary"]["pass_count"] == 5, renamed_payload
+    warnings = [warning for target in renamed_payload["targets"] for warning in target["warnings"]]
+    assert any("source checkout directory differs" in warning for warning in warnings), renamed_payload
 
     broken = tmp_root / "broken-skill"
     (broken / "agents").mkdir(parents=True, exist_ok=True)