fix: isolate every test module however it runs

tests/__init__.py keeps a run offline, its scratch under tmp/ and its
installer cache its own, but only discover -s tests -t . imported it.
discover tests ran with RETROBIOS_OFFLINE unset, scratch on the /tmp
tmpfs and the user's real installer cache, the setting in which e2e
fixtures had written into the shared .cache/large. Every test module now
imports the package first, and a test fails on a module that does not.
test_verify_listing.py took its line with the previous commit.

tests/test_adler32_resolution.py

@@ -9,6 +9,8 @@ corrected it later, every other reader of the resolution did not.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import json
 import shutil

tests/test_agnostic_scan.py

@@ -12,6 +12,8 @@ BIOS root of platforms that do not run that emulator.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import sys
 import tempfile

tests/test_agnostic_scan_mode.py

@@ -8,6 +8,8 @@ libretro core, while verify set the entry aside. Reads the repository.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import unittest

tests/test_agnostic_scope.py

@@ -9,6 +9,8 @@ was not where it looks.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import sys

tests/test_agnostic_substitute.py

@@ -7,6 +7,8 @@ the slot missing and the manifest omitted it.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import re
 import sys
 import tempfile

tests/test_amberelec_targets.py

@@ -8,6 +8,8 @@ the firmware of cores its image never had.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_arcade_parents.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import io
 import json
 import tempfile

tests/test_archive_choice.py

@@ -7,6 +7,8 @@ seven of the eight members Batocera checks were missing.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import shutil

tests/test_archive_recipes.py

@@ -9,6 +9,8 @@ those members were never read there, and the archive matched no recipe.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import sys
 import unittest

tests/test_artifact_lock.py

@@ -7,6 +7,8 @@ ZIPs, which surfaces as BadZipFile far from its cause.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import subprocess
 import sys

tests/test_atomic_artifacts.py

@@ -8,6 +8,8 @@ path in bios/: a scan running beside the copy hashed the truncated file.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import tempfile

tests/test_audit_regressions.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import ast
 import contextlib
 import hashlib
@@ -253,6 +255,46 @@ class AModuleRunAloneHasItsScratchDirectory(unittest.TestCase):
             self.assertEqual(proc.stdout.split(), [scratch, scratch])
 
 
+class EveryTestModuleImportsTheIsolation(unittest.TestCase):
+    """tests/__init__.py keeps a run offline, its scratch under tmp/ and its
+    installer cache its own, but only `discover -s tests -t .` imported it:
+    `discover tests` ran with RETROBIOS_OFFLINE unset, scratch in /tmp and
+    the user's real cache. Each module now imports the package first."""
+
+    def test_the_package_import_comes_before_any_other(self):
+        missing = []
+        for path in sorted((ROOT / "tests").glob("test_*.py")):
+            body = ast.parse(path.read_text(encoding="utf-8")).body
+            imports = [
+                node for node in body
+                if isinstance(node, (ast.Import, ast.ImportFrom))
+                and getattr(node, "module", None) != "__future__"
+            ]
+            first = imports[0] if imports else None
+            if not (isinstance(first, ast.Import)
+                    and [alias.name for alias in first.names] == ["tests"]):
+                missing.append(path.name)
+        self.assertEqual(missing, [])
+
+    def test_discover_without_a_top_level_runs_isolated(self):
+        env = {k: v for k, v in os.environ.items()
+               if k not in ("RETROBIOS_OFFLINE", "TMPDIR", "RETROBIOS_CACHE")}
+        proc = subprocess.run(
+            [sys.executable, "-c",
+             "import os, sys, tempfile, unittest\n"
+             "unittest.TestLoader().discover('tests', pattern='test_artifact_lock.py')\n"
+             "print(os.environ.get('RETROBIOS_OFFLINE'), tempfile.gettempdir(),"
+             " os.environ.get('RETROBIOS_CACHE'))\n"],
+            cwd=ROOT, env=env, capture_output=True, text=True, timeout=120,
+            check=False,
+        )
+        self.assertEqual(proc.returncode, 0, proc.stderr)
+        offline, scratch, cache = proc.stdout.split()
+        self.assertEqual(offline, "1")
+        self.assertEqual(scratch, str(ROOT / "tmp" / "tests"))
+        self.assertEqual(cache, str(ROOT / "tmp" / "tests" / "cache"))
+
+
 class ReleaseSigningRegressions(unittest.TestCase):
     """A checksum list published beside its own artifacts proves nothing.
 

tests/test_autorun.py

@@ -7,6 +7,8 @@ a function returning canned CI runs.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import io
 import json

tests/test_batocera_cores.py

@@ -9,6 +9,8 @@ under it: amiberry, fsuae and vice were never in a target list.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_batocera_md5_list.py

@@ -9,6 +9,8 @@ a list, and verify accepts any listed md5.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import sys
 import tempfile

tests/test_bios_companions.py

@@ -9,6 +9,8 @@ the Batocera BIOS folder.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_bios_layout.py

@@ -7,6 +7,8 @@ Oric and Tangerine: one machine, two folders, two pages.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import subprocess
 import unittest
 from pathlib import Path

tests/test_bundled_identity.py

@@ -13,6 +13,8 @@ entry is written with the hash of the file the emulator ships.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import sys
 import unittest

tests/test_cache_independent_counts.py

@@ -10,6 +10,8 @@ directory cache is not a collection.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import unittest

tests/test_campaign.py

@@ -10,6 +10,8 @@ resume and rerun on a changed core.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import hashlib
 import io

tests/test_case_insensitive_platforms.py

@@ -7,6 +7,8 @@ went red. The flag lived in retrobat.yml and vanished at the next scrape.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import hashlib
 import io

tests/test_casefold_cache.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_check_freshness.py

@@ -8,6 +8,8 @@ report is folded, since each of those decides whether a row says STALE.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import os
 import sys

tests/test_check_release.py

@@ -7,6 +7,8 @@ whose checksums every user's `sha256sum --check` rejected.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_checks_have_values.py

@@ -6,6 +6,8 @@ one. validate_schemas now refuses it.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import subprocess
 import sys
 import unittest

tests/test_cited_lines.py

@@ -7,6 +7,8 @@ does not hold the file.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import re
 import sys
 import unittest

tests/test_contributing_text.py

@@ -6,6 +6,8 @@ the repository, five on the site, under two different titles.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import re
 import sys
 import unittest

tests/test_core_data_trees.py

@@ -10,6 +10,8 @@ reader now gets the tree, or the profile says its package installs it.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import unittest

tests/test_core_file_fills_declaration.py

@@ -8,6 +8,8 @@ frontend sees a file at the path. verify kept it MISSING, so the pack said
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import contextlib
 import io

tests/test_core_probe.py

@@ -7,6 +7,8 @@ probe on it: staging, the worker process, strace, the record and its schema.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import argparse
 import contextlib
 import hashlib

tests/test_core_size_refusal.py

@@ -10,6 +10,8 @@ read one rule (validation.core_size_refusal).
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import sys

tests/test_coverage_cache.py

@@ -9,6 +9,8 @@ tests change an input and expect a fresh computation.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import tempfile
 import unittest

tests/test_cross_reference_sources.py

@@ -9,6 +9,8 @@ a directory called ROM).
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import tempfile
 import unittest

tests/test_crypto_aes.py

@@ -7,6 +7,8 @@ contributor with none of them.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import ast
 import sys
 import unittest

tests/test_crypto_unique_data.py

@@ -18,6 +18,8 @@ Layouts, from Azahar src/core/hw/unique_data.cpp and src/core/file_sys/otp.cpp:
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import struct
 import sys

tests/test_crypto_verify.py

@@ -14,6 +14,8 @@ constants rather than against itself. The AES vector is from NIST SP 800-38A.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import shutil
 import sys

tests/test_data_dir_refs.py

@@ -6,6 +6,8 @@ verify only said "not cached" and refresh_data_dirs had nothing to fetch.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_dataclass_defaults.py

@@ -7,6 +7,8 @@ TypeError on the first loop.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import ast
 import unittest
 from pathlib import Path

tests/test_db_aliases.py

@@ -8,6 +8,8 @@ disk ROM then served the CoCo one.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import tempfile

tests/test_declared_names.py

@@ -8,6 +8,8 @@ set, enriched with every spelling the database knows.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_dedup.py

@@ -9,6 +9,8 @@ are both load-bearing.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import io
 import os

tests/test_derivations.py

@@ -7,6 +7,8 @@ is two held ROMs end to end. The gap report listed them as acquisition targets.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import shutil

tests/test_deterministic_zip.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import tempfile

tests/test_directory_entries.py

@@ -9,6 +9,8 @@ reported missing while 3 584 collected files stayed out of every pack.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import json
 import sys

tests/test_doc_pages.py

@@ -7,6 +7,8 @@ code moves, and nothing else notices.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import ast
 import hashlib
 import inspect

tests/test_doc_surfaces.py

@@ -9,6 +9,8 @@ tool prints, and a size is the one the release record holds.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import ast
 import contextlib
 import re

tests/test_download.py

@@ -9,6 +9,8 @@ checksum of each layout and the staging location.
 """
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import functools
 import hashlib

tests/test_e2e.py

@@ -17,6 +17,8 @@ Covers:
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import hashlib
 import io

tests/test_elec_scrapers.py

@@ -9,6 +9,8 @@ upstream files.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_emuelec_targets.py

@@ -9,6 +9,8 @@ firmware of cores its image never had.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import sys
 import unittest

tests/test_emulator_pack_counts.py

@@ -9,6 +9,8 @@ names and ten "missing".
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import re
 import subprocess
 import sys

tests/test_entry_categories.py

@@ -6,6 +6,8 @@ from what the cores the platform runs open, never from the entry's name.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_export_counts.py

@@ -9,6 +9,8 @@ from a file other than the one the hash describes.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import sys
 import unittest

tests/test_export_native_layer.py

@@ -9,6 +9,8 @@ libretro's System.dat (N88EXT0-3.ROM) as if libretro declared them.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import tempfile
 import unittest

tests/test_export_report.py

@@ -7,6 +7,8 @@ file from and no list to check the diff against.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import re
 import sys
 import tempfile

tests/test_exporters.py

@@ -14,6 +14,8 @@ and skip when it has not been populated (python scripts/export_native.py
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import difflib
 import io
 import json

tests/test_extra_identity.py

@@ -8,6 +8,8 @@ Galaksija ROM and a PS2 ROM2.BIN.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_extract_targets.py

@@ -9,6 +9,8 @@ have vanished with it.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_fbneo_parser.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import tempfile
 import unittest
 from pathlib import Path

tests/test_file_consumers.py

@@ -8,6 +8,8 @@ homonym tests/test_game_data_homonyms.py forbids the resolver to serve.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import sys
 import tempfile

tests/test_fileless_audit.py

@@ -8,6 +8,8 @@ directory, and only a manual reading found it.
 """
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import tempfile
 import unittest

tests/test_finalize_pack_names.py

@@ -7,6 +7,8 @@ attached to misterfpga by substring and checked against the full list:
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import tempfile

tests/test_find_pinned_revision.py

@@ -6,6 +6,8 @@ today's upstream no longer carries, but the bytes are in the project's history.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import sys
 import unittest

tests/test_flycast_layout.py

@@ -9,6 +9,8 @@ and put every file one directory too deep.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import unittest
 from pathlib import Path
 

tests/test_foreign_tree.py

@@ -9,6 +9,8 @@ to upstream PCSX2.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import sys

tests/test_foreign_tree_names.py

@@ -9,6 +9,8 @@ served while data/bluemsx held the 8 KB one.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import shutil

tests/test_frontend_digest.py

@@ -8,6 +8,8 @@ the pack and the manifest while verify, comparing md5, called it OK.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import sys

tests/test_game_catalogs.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import subprocess
 import sys

tests/test_game_data_homonyms.py

@@ -12,6 +12,8 @@ carries `unsourceable:` until its own bytes are held.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import os
 import re

tests/test_game_headers.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import re
 import sys

tests/test_game_regions.py

@@ -8,6 +8,8 @@ can lose its backing, then on the repository's own files.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import copy
 import json
 import sys

tests/test_games_index.py

@@ -7,6 +7,8 @@ so a test pins the join and not the state of the data.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import shutil
 import sys

tests/test_gap_settlement.py

@@ -7,6 +7,8 @@ it. RetroArch names Galaksija's 4 KiB galaksija/rom1.bin, so DOSBox's
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path

tests/test_handheld_launchers.py

@@ -10,6 +10,8 @@ the pad reaching the console, a compositor covering it) is not exercised.
 """
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import importlib.util
 import json

tests/test_hash_merge.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import tempfile
 import unittest

tests/test_hashing.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import shutil
 import sys
 import tempfile

tests/test_hidden_extras.py

@@ -9,6 +9,8 @@ ROCKNIX's higan SGB1.sfc/program.rom under the file SGB1.sfc.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import unittest

tests/test_identity.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import shutil
 import sys
 import tempfile

tests/test_install.py

@@ -1,6 +1,8 @@
 """Tests for install.py platform detection and config parsing."""
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import functools
 import hashlib

tests/test_install_app.py

@@ -8,6 +8,8 @@ menu) is not exercised.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import io
 import json

tests/test_install_cores.py

@@ -8,6 +8,8 @@ which cores keep each system, the rule a pack built for a target follows.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import io
 import json

tests/test_install_experience.py

@@ -7,6 +7,8 @@ honours Retry-After, and large files that resume where they stopped.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import errno
 import hashlib

tests/test_install_from.py

@@ -11,6 +11,8 @@ never moved, and checked again once written.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import copy
 import errno

tests/test_install_games.py

@@ -8,6 +8,8 @@ index, published by scripts/generate_games_index.py.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import functools
 import gzip

tests/test_install_offline.py

@@ -9,6 +9,8 @@ installs again from disk, --from-pack, every file checked by its hash.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import hashlib
 import io

tests/test_install_selection.py

@@ -9,6 +9,8 @@ to one answer.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import contextlib
 import functools
 import hashlib

tests/test_install_tui.py

@@ -9,6 +9,8 @@ installs it).
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import argparse
 import contextlib
 import errno

tests/test_lakka_targets.py

@@ -7,6 +7,8 @@ platform outright.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import unittest
 
 from scripts.scraper.targets import lakka_targets_scraper as lakka

tests/test_large_file_cache.py

@@ -8,6 +8,8 @@ that then replaced the cache entry.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import io
 import json

tests/test_launcher_aliases.py

@@ -16,6 +16,8 @@ Two checks read the committed data:
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import re
 import unittest
 from collections import defaultdict

tests/test_launcher_layer.py

@@ -8,6 +8,8 @@ and a fixed path the launcher passes (Batocera's x16emu shape).
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import hashlib
 import inspect
 import os

tests/test_launchers.py

@@ -8,6 +8,8 @@ is checked against the revision itself.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import dataclasses
 import json
 import sys

tests/test_launchers_emudeck.py

@@ -8,6 +8,8 @@ fixture's own lines, and a construct that is gone must stop the scrape.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import textwrap
 import unittest

tests/test_launchers_recalbox.py

@@ -8,6 +8,8 @@ is checked against the tag itself.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import json
 import sys
 import unittest

tests/test_launchers_retrobat.py

@@ -8,6 +8,8 @@ the fixture's own lines, and a construct that is gone must stop the scrape.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import textwrap
 import unittest

tests/test_launchers_retrodeck.py

@@ -8,6 +8,8 @@ cites. A construct that is gone or unknown must stop the scrape.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import textwrap
 import unittest

tests/test_launchers_retropie.py

@@ -8,6 +8,8 @@ cites. A construct that is gone or unknown must stop the scrape.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import dataclasses
 import json
 import sys

tests/test_launchers_rocknix.py

@@ -9,6 +9,8 @@ configs differ, and a construct that is gone must stop the scrape.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import textwrap
 import unittest

tests/test_libretro_layout.py

@@ -9,6 +9,8 @@ Sys from system/dolphin-emu/Sys and keeps User in the save directory.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import os
 import sys
 import unittest

tests/test_libretro_slugs.py

@@ -9,6 +9,8 @@ duplicate system carrying the quasi88 group.
 
 from __future__ import annotations
 
+import tests  # noqa: F401  offline, scratch under tmp/, the suite's own cache
+
 import sys
 import unittest
 from pathlib import Path