diff --git a/eden/fs/cli/constants.py b/eden/fs/cli/constants.py
index 37ec423836635..32df8c933a431 100644
--- a/eden/fs/cli/constants.py
+++ b/eden/fs/cli/constants.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 SHUTDOWN_EXIT_CODE_NORMAL = 0
 SHUTDOWN_EXIT_CODE_REQUESTED_SHUTDOWN = 0
 SHUTDOWN_EXIT_CODE_NOT_RUNNING_ERROR = 2
diff --git a/eden/fs/cli/debug_windows.py b/eden/fs/cli/debug_windows.py
index 15067598d726a..85ce967188d5d 100644
--- a/eden/fs/cli/debug_windows.py
+++ b/eden/fs/cli/debug_windows.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import argparse
 from pathlib import Path
 
diff --git a/eden/fs/cli/doctor/check_filesystems.py b/eden/fs/cli/doctor/check_filesystems.py
index b635258dfc62d..0fa9f818a47f2 100644
--- a/eden/fs/cli/doctor/check_filesystems.py
+++ b/eden/fs/cli/doctor/check_filesystems.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import hashlib
 import json
 import os
diff --git a/eden/fs/cli/doctor/check_kerberos.py b/eden/fs/cli/doctor/check_kerberos.py
index f3b95b41c2fef..6d32970435153 100644
--- a/eden/fs/cli/doctor/check_kerberos.py
+++ b/eden/fs/cli/doctor/check_kerberos.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import subprocess
 
 from eden.fs.cli.config import EdenInstance
diff --git a/eden/fs/cli/doctor/check_os.py b/eden/fs/cli/doctor/check_os.py
index 3b4cd7196831b..fee9dbc2a738b 100644
--- a/eden/fs/cli/doctor/check_os.py
+++ b/eden/fs/cli/doctor/check_os.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import platform
 import re
 import subprocess
diff --git a/eden/fs/cli/doctor/check_recent_writes.py b/eden/fs/cli/doctor/check_recent_writes.py
index c495188922fbd..c30f5fa056287 100644
--- a/eden/fs/cli/doctor/check_recent_writes.py
+++ b/eden/fs/cli/doctor/check_recent_writes.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 from typing import Dict
 
 from eden.fs.cli.config import EdenInstance
diff --git a/eden/fs/cli/doctor/check_redirections.py b/eden/fs/cli/doctor/check_redirections.py
index a6344755b5356..402096be6cff3 100644
--- a/eden/fs/cli/doctor/check_redirections.py
+++ b/eden/fs/cli/doctor/check_redirections.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 
 from eden.fs.cli import mtab
 from eden.fs.cli.config import EdenCheckout, EdenInstance
diff --git a/eden/fs/cli/doctor/check_stale_mounts.py b/eden/fs/cli/doctor/check_stale_mounts.py
index 2c14ac587e307..f679e2487e14c 100644
--- a/eden/fs/cli/doctor/check_stale_mounts.py
+++ b/eden/fs/cli/doctor/check_stale_mounts.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import errno
 import logging
 import os
diff --git a/eden/fs/cli/doctor/problem.py b/eden/fs/cli/doctor/problem.py
index a9f61f779afad..5893f887691e9 100644
--- a/eden/fs/cli/doctor/problem.py
+++ b/eden/fs/cli/doctor/problem.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import abc
 from enum import IntEnum
 from typing import List, Optional, Set
diff --git a/eden/fs/cli/doctor/test/doctor_unix_test.py b/eden/fs/cli/doctor/test/doctor_unix_test.py
index 8fe95d661439e..e655da98b0989 100644
--- a/eden/fs/cli/doctor/test/doctor_unix_test.py
+++ b/eden/fs/cli/doctor/test/doctor_unix_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import sys
 from typing import Optional
 from unittest.mock import MagicMock, patch
diff --git a/eden/fs/cli/doctor/test/hang_mount_test.py b/eden/fs/cli/doctor/test/hang_mount_test.py
index 0eeecf8a118fd..7911aac98bf9c 100644
--- a/eden/fs/cli/doctor/test/hang_mount_test.py
+++ b/eden/fs/cli/doctor/test/hang_mount_test.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 
 from typing import List, Tuple
 
diff --git a/eden/fs/cli/doctor/test/lib/fake_constants.py b/eden/fs/cli/doctor/test/lib/fake_constants.py
index b2314679e1017..dd74205234fd4 100644
--- a/eden/fs/cli/doctor/test/lib/fake_constants.py
+++ b/eden/fs/cli/doctor/test/lib/fake_constants.py
@@ -4,5 +4,7 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 
 FAKE_UID = 1234
diff --git a/eden/fs/cli/doctor/test/lib/fake_hang_mount_table.py b/eden/fs/cli/doctor/test/lib/fake_hang_mount_table.py
index f9d14e275cadf..d676428f68b00 100644
--- a/eden/fs/cli/doctor/test/lib/fake_hang_mount_table.py
+++ b/eden/fs/cli/doctor/test/lib/fake_hang_mount_table.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import multiprocessing
 import os
 import random
diff --git a/eden/fs/cli/doctor/test/lib/fake_kerberos_checker.py b/eden/fs/cli/doctor/test/lib/fake_kerberos_checker.py
index cb6349a596008..a1768bd18e35e 100644
--- a/eden/fs/cli/doctor/test/lib/fake_kerberos_checker.py
+++ b/eden/fs/cli/doctor/test/lib/fake_kerberos_checker.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 from eden.fs.cli.config import EdenInstance
 from eden.fs.cli.doctor.check_kerberos import KerberosChecker
 from eden.fs.cli.doctor.problem import ProblemTracker
diff --git a/eden/fs/cli/doctor/test/lib/fake_vscode_extensions_checker.py b/eden/fs/cli/doctor/test/lib/fake_vscode_extensions_checker.py
index cdc39c1d4c50c..8a0c5af1631b2 100644
--- a/eden/fs/cli/doctor/test/lib/fake_vscode_extensions_checker.py
+++ b/eden/fs/cli/doctor/test/lib/fake_vscode_extensions_checker.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 from typing import List
 
 try:
diff --git a/eden/fs/cli/doctor/test/lib/problem_collector.py b/eden/fs/cli/doctor/test/lib/problem_collector.py
index c0ac359d68b9b..56ca1b0a1589e 100644
--- a/eden/fs/cli/doctor/test/lib/problem_collector.py
+++ b/eden/fs/cli/doctor/test/lib/problem_collector.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 from typing import List
 
 from eden.fs.cli.config import AbstractEdenInstance
diff --git a/eden/fs/cli/doctor/test/lib/testcase.py b/eden/fs/cli/doctor/test/lib/testcase.py
index 368efe91b3c15..5ee6601170feb 100644
--- a/eden/fs/cli/doctor/test/lib/testcase.py
+++ b/eden/fs/cli/doctor/test/lib/testcase.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import binascii
 import unittest
 from typing import Tuple
diff --git a/eden/fs/cli/doctor/test/os_test.py b/eden/fs/cli/doctor/test/os_test.py
index 1fec2687046ff..69a16316be555 100644
--- a/eden/fs/cli/doctor/test/os_test.py
+++ b/eden/fs/cli/doctor/test/os_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import typing
 
 from eden.fs.cli.config import EdenInstance
diff --git a/eden/fs/cli/hostname.py b/eden/fs/cli/hostname.py
index f462db41e15a3..4993437c83b0f 100644
--- a/eden/fs/cli/hostname.py
+++ b/eden/fs/cli/hostname.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import re
 import socket
 
diff --git a/eden/fs/cli/overlay.py b/eden/fs/cli/overlay.py
index 85f3190acf405..4d315fe9b96db 100644
--- a/eden/fs/cli/overlay.py
+++ b/eden/fs/cli/overlay.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import contextlib
 import errno
 import logging
diff --git a/eden/fs/cli/prefetch.py b/eden/fs/cli/prefetch.py
index 43ba87c5a3bd2..bdb04f67f5172 100644
--- a/eden/fs/cli/prefetch.py
+++ b/eden/fs/cli/prefetch.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import argparse
 import os
 import sys
diff --git a/eden/fs/cli/prjfs.py b/eden/fs/cli/prjfs.py
index 9bb98d0d04360..c0d513c19aa17 100644
--- a/eden/fs/cli/prjfs.py
+++ b/eden/fs/cli/prjfs.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import ctypes
 import enum
 import sys
diff --git a/eden/fs/cli/proc_utils_win.py b/eden/fs/cli/proc_utils_win.py
index e1d724fad562e..4336d2fc160de 100644
--- a/eden/fs/cli/proc_utils_win.py
+++ b/eden/fs/cli/proc_utils_win.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import ctypes
 import datetime
 import sys
diff --git a/eden/fs/cli/rage.py b/eden/fs/cli/rage.py
index 00ec8d994ddde..e1c3abd87dc1f 100644
--- a/eden/fs/cli/rage.py
+++ b/eden/fs/cli/rage.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import csv
 import getpass
 import io
diff --git a/eden/fs/cli/repl.py b/eden/fs/cli/repl.py
index f0eb3fc993e54..fba5f0998045e 100644
--- a/eden/fs/cli/repl.py
+++ b/eden/fs/cli/repl.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 
 import asyncio
 import selectors
diff --git a/eden/fs/cli/trace.py b/eden/fs/cli/trace.py
index 3c75139605980..c1cbc88c60402 100644
--- a/eden/fs/cli/trace.py
+++ b/eden/fs/cli/trace.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import argparse
 
 from . import cmd_util, subcmd as subcmd_mod
diff --git a/eden/fs/cli/trace_cmd.py b/eden/fs/cli/trace_cmd.py
index b0ef28e5f02cf..c979131d57522 100644
--- a/eden/fs/cli/trace_cmd.py
+++ b/eden/fs/cli/trace_cmd.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 from __future__ import absolute_import, division, print_function, unicode_literals
 
 import argparse
diff --git a/eden/fs/cli/win_ui.py b/eden/fs/cli/win_ui.py
index fbf83cfe500ef..d17bf7a925262 100644
--- a/eden/fs/cli/win_ui.py
+++ b/eden/fs/cli/win_ui.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 from . import ui
 
 
diff --git a/eden/fs/py/test/dirstate_test.py b/eden/fs/py/test/dirstate_test.py
index acc27b6548664..aebe239a54c72 100644
--- a/eden/fs/py/test/dirstate_test.py
+++ b/eden/fs/py/test/dirstate_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-strict
+
 import io
 import unittest
 
diff --git a/eden/integration/basic_test.py b/eden/integration/basic_test.py
index b57d4d05cd050..09704a89e5b86 100644
--- a/eden/integration/basic_test.py
+++ b/eden/integration/basic_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import json
 import os
diff --git a/eden/integration/casing_test.py b/eden/integration/casing_test.py
index 624d952e195cd..77e4f4eab55f9 100644
--- a/eden/integration/casing_test.py
+++ b/eden/integration/casing_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from .lib import testcase
diff --git a/eden/integration/chown_test.py b/eden/integration/chown_test.py
index 57353e6dbd3d9..b51485d840558 100644
--- a/eden/integration/chown_test.py
+++ b/eden/integration/chown_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from .lib import repobase, testcase
diff --git a/eden/integration/clone_test.py b/eden/integration/clone_test.py
index 27c84bfd5bb61..25537a8c5c071 100644
--- a/eden/integration/clone_test.py
+++ b/eden/integration/clone_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import json
 import os
 import subprocess
diff --git a/eden/integration/config_test.py b/eden/integration/config_test.py
index 305347ad3d9d7..8859b42a0aa35 100644
--- a/eden/integration/config_test.py
+++ b/eden/integration/config_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import time
 from pathlib import Path
 
diff --git a/eden/integration/corrupt_overlay_test.py b/eden/integration/corrupt_overlay_test.py
index 4b687c1836b90..1203cefcf50f9 100644
--- a/eden/integration/corrupt_overlay_test.py
+++ b/eden/integration/corrupt_overlay_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 import os
 import pathlib
diff --git a/eden/integration/debug_getpath_test.py b/eden/integration/debug_getpath_test.py
index 039066a288ca3..b38afe1a3cad3 100644
--- a/eden/integration/debug_getpath_test.py
+++ b/eden/integration/debug_getpath_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import stat
 import time
diff --git a/eden/integration/debug_subscribe_test.py b/eden/integration/debug_subscribe_test.py
index 5f1f3e13ef33c..1df73ce98b9e1 100644
--- a/eden/integration/debug_subscribe_test.py
+++ b/eden/integration/debug_subscribe_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import asyncio
 import json
 import platform
diff --git a/eden/integration/debug_test.py b/eden/integration/debug_test.py
index e807837d0aeb4..ae3dee4aa0139 100644
--- a/eden/integration/debug_test.py
+++ b/eden/integration/debug_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import binascii
 import os
 import sys
diff --git a/eden/integration/doteden_test.py b/eden/integration/doteden_test.py
index 700bd721218e3..bad7be9b352ba 100644
--- a/eden/integration/doteden_test.py
+++ b/eden/integration/doteden_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 import stat
diff --git a/eden/integration/edenclient_test.py b/eden/integration/edenclient_test.py
index 28f5fbe1cab00..7def177389a51 100644
--- a/eden/integration/edenclient_test.py
+++ b/eden/integration/edenclient_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import pathlib
 
 from .lib import testcase
diff --git a/eden/integration/fsck/basic_snapshot_tests.py b/eden/integration/fsck/basic_snapshot_tests.py
index e34e4e3f3076f..b3d9484480aa1 100644
--- a/eden/integration/fsck/basic_snapshot_tests.py
+++ b/eden/integration/fsck/basic_snapshot_tests.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import binascii
 import re
diff --git a/eden/integration/fsck_test.py b/eden/integration/fsck_test.py
index dda5096eed1dd..9f811150b1156 100644
--- a/eden/integration/fsck_test.py
+++ b/eden/integration/fsck_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import pathlib
 import subprocess
 from pathlib import Path
diff --git a/eden/integration/glob_test.py b/eden/integration/glob_test.py
index f15c9e9152d4f..612588193d8ad 100644
--- a/eden/integration/glob_test.py
+++ b/eden/integration/glob_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 import time
 from typing import List, Optional, Tuple
diff --git a/eden/integration/health_test.py b/eden/integration/health_test.py
index 8b5d89d5dff23..e00e7c44b5158 100644
--- a/eden/integration/health_test.py
+++ b/eden/integration/health_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import signal
 import sys
diff --git a/eden/integration/help_test.py b/eden/integration/help_test.py
index 01bb06d2bb5bc..b319933b3876e 100644
--- a/eden/integration/help_test.py
+++ b/eden/integration/help_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from .lib import edenclient, testcase
 
 
diff --git a/eden/integration/hg/absorb_test.py b/eden/integration/hg/absorb_test.py
index adb125c5b2c76..a40bc289ea7d5 100644
--- a/eden/integration/hg/absorb_test.py
+++ b/eden/integration/hg/absorb_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/add_test.py b/eden/integration/hg/add_test.py
index c094d34b80283..4271890962527 100644
--- a/eden/integration/hg/add_test.py
+++ b/eden/integration/hg/add_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 import sys
diff --git a/eden/integration/hg/commit_test.py b/eden/integration/hg/commit_test.py
index ff34158340419..be33e885f8b79 100644
--- a/eden/integration/hg/commit_test.py
+++ b/eden/integration/hg/commit_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/copy_test.py b/eden/integration/hg/copy_test.py
index 4e61280b9db88..93f7b745a7c3f 100755
--- a/eden/integration/hg/copy_test.py
+++ b/eden/integration/hg/copy_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from textwrap import dedent
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/debug_clear_local_caches_test.py b/eden/integration/hg/debug_clear_local_caches_test.py
index 19d28b7c567a8..9fc5e3b2ffe9f 100644
--- a/eden/integration/hg/debug_clear_local_caches_test.py
+++ b/eden/integration/hg/debug_clear_local_caches_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/debug_get_parents.py b/eden/integration/hg/debug_get_parents.py
index 66a95a46c43e0..3624d1e696b32 100644
--- a/eden/integration/hg/debug_get_parents.py
+++ b/eden/integration/hg/debug_get_parents.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from pathlib import Path
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/debug_hg_dirstate_test.py b/eden/integration/hg/debug_hg_dirstate_test.py
index 294eeb1400044..e3a234cfd3fa2 100644
--- a/eden/integration/hg/debug_hg_dirstate_test.py
+++ b/eden/integration/hg/debug_hg_dirstate_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from textwrap import dedent
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/diff_test.py b/eden/integration/hg/diff_test.py
index 6b21e0e84916f..fcf0271ba6085 100644
--- a/eden/integration/hg/diff_test.py
+++ b/eden/integration/hg/diff_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from typing import List
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/doctor_test.py b/eden/integration/hg/doctor_test.py
index 221d0364da614..b4fc7becff3f5 100755
--- a/eden/integration/hg/doctor_test.py
+++ b/eden/integration/hg/doctor_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 from pathlib import Path
diff --git a/eden/integration/hg/files_test.py b/eden/integration/hg/files_test.py
index fa108299d1779..7a84014363fc8 100644
--- a/eden/integration/hg/files_test.py
+++ b/eden/integration/hg/files_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 from typing import List
diff --git a/eden/integration/hg/filteredhg_clone_test.py b/eden/integration/hg/filteredhg_clone_test.py
index 497e6c10f8e45..b522726981d33 100644
--- a/eden/integration/hg/filteredhg_clone_test.py
+++ b/eden/integration/hg/filteredhg_clone_test.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 from pathlib import Path
diff --git a/eden/integration/hg/filteredhg_test.py b/eden/integration/hg/filteredhg_test.py
index 5263f71850d84..5d4f88a302ed7 100644
--- a/eden/integration/hg/filteredhg_test.py
+++ b/eden/integration/hg/filteredhg_test.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 
 import os
 from typing import Optional, Set
diff --git a/eden/integration/hg/fold_test.py b/eden/integration/hg/fold_test.py
index 119aeaaf2dc2b..a946e37583f91 100644
--- a/eden/integration/hg/fold_test.py
+++ b/eden/integration/hg/fold_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import hgrepo
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/graft_test.py b/eden/integration/hg/graft_test.py
index 48e5409a3ace4..1e7b14523becf 100644
--- a/eden/integration/hg/graft_test.py
+++ b/eden/integration/hg/graft_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/grep_test.py b/eden/integration/hg/grep_test.py
index 8ecdc1ac75079..8d8590d908bcf 100644
--- a/eden/integration/hg/grep_test.py
+++ b/eden/integration/hg/grep_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import sys
 from textwrap import dedent
 
diff --git a/eden/integration/hg/histedit_test.py b/eden/integration/hg/histedit_test.py
index 97f54b5a70dfa..f2426ad53d93b 100644
--- a/eden/integration/hg/histedit_test.py
+++ b/eden/integration/hg/histedit_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/journal_test.py b/eden/integration/hg/journal_test.py
index 6c0acdd0a7be5..9a7380eaf79a3 100644
--- a/eden/integration/hg/journal_test.py
+++ b/eden/integration/hg/journal_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import hgrepo
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test, JournalEntry
diff --git a/eden/integration/hg/legacy_filter_test.py b/eden/integration/hg/legacy_filter_test.py
index e83cf9fa942ea..54a3eee5da03e 100644
--- a/eden/integration/hg/legacy_filter_test.py
+++ b/eden/integration/hg/legacy_filter_test.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import sys
 from typing import Dict, List, Optional, Set
 
diff --git a/eden/integration/hg/lib/hg_extension_test_base.py b/eden/integration/hg/lib/hg_extension_test_base.py
index 5d389c8080d95..749ccf83aecb8 100755
--- a/eden/integration/hg/lib/hg_extension_test_base.py
+++ b/eden/integration/hg/lib/hg_extension_test_base.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import configparser
 import itertools
diff --git a/eden/integration/hg/lib/hg_extension_test_base_test.py b/eden/integration/hg/lib/hg_extension_test_base_test.py
index 7f351a435b958..057e3989d0116 100644
--- a/eden/integration/hg/lib/hg_extension_test_base_test.py
+++ b/eden/integration/hg/lib/hg_extension_test_base_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/lib/histedit_command.py b/eden/integration/hg/lib/histedit_command.py
index 3e5d72af62d31..6410829147c83 100644
--- a/eden/integration/hg/lib/histedit_command.py
+++ b/eden/integration/hg/lib/histedit_command.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 from typing import Optional
 
diff --git a/eden/integration/hg/merge_test.py b/eden/integration/hg/merge_test.py
index 93e6e20276cd8..e5dd3139bfb60 100644
--- a/eden/integration/hg/merge_test.py
+++ b/eden/integration/hg/merge_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib.hgrepo import HgRepository
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/move_test.py b/eden/integration/hg/move_test.py
index dd89526eb56ee..8f7a33a326112 100644
--- a/eden/integration/hg/move_test.py
+++ b/eden/integration/hg/move_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 from textwrap import dedent
 
diff --git a/eden/integration/hg/negative_caching_test.py b/eden/integration/hg/negative_caching_test.py
index 6882715615889..f57f883302a87 100644
--- a/eden/integration/hg/negative_caching_test.py
+++ b/eden/integration/hg/negative_caching_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import sys
 
diff --git a/eden/integration/hg/non_eden_operation_test.py b/eden/integration/hg/non_eden_operation_test.py
index 91744b34e00d7..6e2711868d626 100644
--- a/eden/integration/hg/non_eden_operation_test.py
+++ b/eden/integration/hg/non_eden_operation_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.hg.lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/post_clone_test.py b/eden/integration/hg/post_clone_test.py
index 72ade2ab9cc3c..819378903f874 100644
--- a/eden/integration/hg/post_clone_test.py
+++ b/eden/integration/hg/post_clone_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import sys
 
diff --git a/eden/integration/hg/rebase_test.py b/eden/integration/hg/rebase_test.py
index 0dcc389c541ed..ae495ad92bd72 100644
--- a/eden/integration/hg/rebase_test.py
+++ b/eden/integration/hg/rebase_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 import threading
diff --git a/eden/integration/hg/revert_test.py b/eden/integration/hg/revert_test.py
index 0a5e4526170e0..ddcc861048f5c 100644
--- a/eden/integration/hg/revert_test.py
+++ b/eden/integration/hg/revert_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import hgrepo
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/rm_test.py b/eden/integration/hg/rm_test.py
index a94480f44a3ff..0fcf75cb0da7f 100644
--- a/eden/integration/hg/rm_test.py
+++ b/eden/integration/hg/rm_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/rollback_test.py b/eden/integration/hg/rollback_test.py
index af5a625eda5a3..f65ba6360b0d1 100644
--- a/eden/integration/hg/rollback_test.py
+++ b/eden/integration/hg/rollback_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import hgrepo
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/shelve_test.py b/eden/integration/hg/shelve_test.py
index 0632602612671..75ccfbe059616 100755
--- a/eden/integration/hg/shelve_test.py
+++ b/eden/integration/hg/shelve_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/sparse_test.py b/eden/integration/hg/sparse_test.py
index 23621d91050b4..76d5039e4c4c8 100755
--- a/eden/integration/hg/sparse_test.py
+++ b/eden/integration/hg/sparse_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import hgrepo
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/split_test.py b/eden/integration/hg/split_test.py
index 77a67c9d95767..de2ebb249a4b4 100644
--- a/eden/integration/hg/split_test.py
+++ b/eden/integration/hg/split_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import hgrepo
 
 from .lib.hg_extension_test_base import EdenHgTestCase, hg_test
diff --git a/eden/integration/hg/status_deadlock_test.py b/eden/integration/hg/status_deadlock_test.py
index df5fe14d8d4f9..a9c654afc9d4e 100644
--- a/eden/integration/hg/status_deadlock_test.py
+++ b/eden/integration/hg/status_deadlock_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 import os
 from typing import Dict, List
diff --git a/eden/integration/hg/status_test.py b/eden/integration/hg/status_test.py
index c50a1313743a1..edc8190978652 100755
--- a/eden/integration/hg/status_test.py
+++ b/eden/integration/hg/status_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import binascii
 import os
 import socket
diff --git a/eden/integration/hg/storage_engine_test.py b/eden/integration/hg/storage_engine_test.py
index 65d06c415f440..19e6c47815b90 100644
--- a/eden/integration/hg/storage_engine_test.py
+++ b/eden/integration/hg/storage_engine_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import os
 import subprocess
diff --git a/eden/integration/hg/symlink_test.py b/eden/integration/hg/symlink_test.py
index fb91f422e2fb1..3f0dee289c4ab 100644
--- a/eden/integration/hg/symlink_test.py
+++ b/eden/integration/hg/symlink_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from eden.integration.lib import hgrepo
diff --git a/eden/integration/hg/undo_test.py b/eden/integration/hg/undo_test.py
index 4b050f4cd1226..308dd7fd2e3ad 100644
--- a/eden/integration/hg/undo_test.py
+++ b/eden/integration/hg/undo_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 import os
 from typing import Dict, Optional
diff --git a/eden/integration/hg/update_test.py b/eden/integration/hg/update_test.py
index 2a8bd5493cfe7..39e2c011b5c08 100755
--- a/eden/integration/hg/update_test.py
+++ b/eden/integration/hg/update_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 import os
 import re
diff --git a/eden/integration/info_test.py b/eden/integration/info_test.py
index 228f823dc262b..735013acd2d2d 100644
--- a/eden/integration/info_test.py
+++ b/eden/integration/info_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import json
 import os
 
diff --git a/eden/integration/invalidate_test.py b/eden/integration/invalidate_test.py
index f7ba4713a4b81..d72a7f0b7de19 100644
--- a/eden/integration/invalidate_test.py
+++ b/eden/integration/invalidate_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import time
 from typing import Dict, List
diff --git a/eden/integration/lib/eden_server_inspector.py b/eden/integration/lib/eden_server_inspector.py
index eb6269de19128..ccb891a05d142 100644
--- a/eden/integration/lib/eden_server_inspector.py
+++ b/eden/integration/lib/eden_server_inspector.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 from typing import Iterable
 
diff --git a/eden/integration/lib/edenclient.py b/eden/integration/lib/edenclient.py
index cf71690209977..e2a53f8d99a95 100644
--- a/eden/integration/lib/edenclient.py
+++ b/eden/integration/lib/edenclient.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import json
 import logging
 import os
diff --git a/eden/integration/lib/error.py b/eden/integration/lib/error.py
index f34e2ece62221..adc2d7038a282 100644
--- a/eden/integration/lib/error.py
+++ b/eden/integration/lib/error.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import shlex
 import subprocess
 
diff --git a/eden/integration/lib/fake_edenfs.py b/eden/integration/lib/fake_edenfs.py
index 9ad30a6803c25..ba067d4529c95 100644
--- a/eden/integration/lib/fake_edenfs.py
+++ b/eden/integration/lib/fake_edenfs.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import contextlib
 import os
 import pathlib
diff --git a/eden/integration/lib/gitrepo.py b/eden/integration/lib/gitrepo.py
index 5f2dbcc6333f0..a7e52a527cb17 100644
--- a/eden/integration/lib/gitrepo.py
+++ b/eden/integration/lib/gitrepo.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import datetime
 import os
 import subprocess
diff --git a/eden/integration/lib/hgrepo.py b/eden/integration/lib/hgrepo.py
index bee1526cf6fda..7ecdb5c4f956b 100755
--- a/eden/integration/lib/hgrepo.py
+++ b/eden/integration/lib/hgrepo.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import configparser
 import datetime
 import json
diff --git a/eden/integration/lib/overlay.py b/eden/integration/lib/overlay.py
index 81ca7ee60d66e..f8801ed705a5f 100644
--- a/eden/integration/lib/overlay.py
+++ b/eden/integration/lib/overlay.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import pathlib
 import stat
diff --git a/eden/integration/lib/pexpect.py b/eden/integration/lib/pexpect.py
index 4ca354c2da167..cc67024ff41f9 100644
--- a/eden/integration/lib/pexpect.py
+++ b/eden/integration/lib/pexpect.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import shlex
 import sys
diff --git a/eden/integration/lib/repobase.py b/eden/integration/lib/repobase.py
index 2e5e372f65c62..5c844afd881cc 100644
--- a/eden/integration/lib/repobase.py
+++ b/eden/integration/lib/repobase.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import datetime
 import errno
 import os
diff --git a/eden/integration/lib/service_test_case.py b/eden/integration/lib/service_test_case.py
index 5884fd2c2c505..cd0e34cc66c37 100644
--- a/eden/integration/lib/service_test_case.py
+++ b/eden/integration/lib/service_test_case.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import pathlib
 import sys
diff --git a/eden/integration/lib/skip.py b/eden/integration/lib/skip.py
index dff2a92bb236d..c1034fbc500c9 100644
--- a/eden/integration/lib/skip.py
+++ b/eden/integration/lib/skip.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import sys
 import unittest
diff --git a/eden/integration/lib/start.py b/eden/integration/lib/start.py
index 775785727a424..f907b8e574057 100644
--- a/eden/integration/lib/start.py
+++ b/eden/integration/lib/start.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 
 import contextlib
 import os
diff --git a/eden/integration/lib/temporary_directory.py b/eden/integration/lib/temporary_directory.py
index 21d396e886f61..53cd7443f4d3e 100644
--- a/eden/integration/lib/temporary_directory.py
+++ b/eden/integration/lib/temporary_directory.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import contextlib
 import pathlib
 import tempfile
diff --git a/eden/integration/lib/testcase.py b/eden/integration/lib/testcase.py
index 235c924dc19ff..ee62bb5bc24e6 100644
--- a/eden/integration/lib/testcase.py
+++ b/eden/integration/lib/testcase.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import configparser
 import errno
 import hashlib
diff --git a/eden/integration/lib/util.py b/eden/integration/lib/util.py
index d3fb07542a403..0c496ce717817 100644
--- a/eden/integration/lib/util.py
+++ b/eden/integration/lib/util.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import sys
 from typing import Callable, List, Optional
diff --git a/eden/integration/long_path_test.py b/eden/integration/long_path_test.py
index 9abf733aaa03e..2bf8053472847 100644
--- a/eden/integration/long_path_test.py
+++ b/eden/integration/long_path_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from typing import Dict
 
 from facebook.eden.ttypes import GetScmStatusParams, ScmFileStatus
diff --git a/eden/integration/materialized_query_test.py b/eden/integration/materialized_query_test.py
index 2133e69c2a13d..264d0a637fc1f 100644
--- a/eden/integration/materialized_query_test.py
+++ b/eden/integration/materialized_query_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 import stat
diff --git a/eden/integration/mmap_test.py b/eden/integration/mmap_test.py
index 284d5ae36e8f8..8f3214761c39f 100644
--- a/eden/integration/mmap_test.py
+++ b/eden/integration/mmap_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import ctypes
 import mmap
 import os
diff --git a/eden/integration/mount_test.py b/eden/integration/mount_test.py
index 5fd2cb5247cd8..9b575c1371ba6 100644
--- a/eden/integration/mount_test.py
+++ b/eden/integration/mount_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import re
 import shutil
diff --git a/eden/integration/oexcl_test.py b/eden/integration/oexcl_test.py
index 4483d86785608..056b31aa68bb4 100644
--- a/eden/integration/oexcl_test.py
+++ b/eden/integration/oexcl_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 
diff --git a/eden/integration/patch_test.py b/eden/integration/patch_test.py
index b88abda0cb063..19dab31626967 100644
--- a/eden/integration/patch_test.py
+++ b/eden/integration/patch_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 from typing import Dict
diff --git a/eden/integration/persistence_test.py b/eden/integration/persistence_test.py
index 01620456ac317..e8922da6d9ed5 100644
--- a/eden/integration/persistence_test.py
+++ b/eden/integration/persistence_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import sys
 from typing import Dict
diff --git a/eden/integration/prjfs_match_fs.py b/eden/integration/prjfs_match_fs.py
index f75e2be9ea390..24bd93afea35f 100644
--- a/eden/integration/prjfs_match_fs.py
+++ b/eden/integration/prjfs_match_fs.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from typing import List
 
 from facebook.eden.ttypes import (
diff --git a/eden/integration/prjfs_stress.py b/eden/integration/prjfs_stress.py
index cd9babdf59bad..1422f808b0469 100644
--- a/eden/integration/prjfs_stress.py
+++ b/eden/integration/prjfs_stress.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import stat
 import subprocess
diff --git a/eden/integration/projfs_buffer.py b/eden/integration/projfs_buffer.py
index 58ee37e8e4fd3..d17420ab26af9 100644
--- a/eden/integration/projfs_buffer.py
+++ b/eden/integration/projfs_buffer.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 import sys
diff --git a/eden/integration/rage_test.py b/eden/integration/rage_test.py
index a6e3a06fca868..37ff93ba47641 100644
--- a/eden/integration/rage_test.py
+++ b/eden/integration/rage_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 
 from .lib import repobase, testcase
diff --git a/eden/integration/rc_test.py b/eden/integration/rc_test.py
index ef87cb41ecb08..8eb934ca4e81d 100644
--- a/eden/integration/rc_test.py
+++ b/eden/integration/rc_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 
 from .lib import testcase
diff --git a/eden/integration/readdir_test.py b/eden/integration/readdir_test.py
index 32c4eb016c975..92b74c6c83e93 100644
--- a/eden/integration/readdir_test.py
+++ b/eden/integration/readdir_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import hashlib
 import os
 import re
diff --git a/eden/integration/redirect_test.py b/eden/integration/redirect_test.py
index 5c0ff69625558..cd3f3c5278d6f 100644
--- a/eden/integration/redirect_test.py
+++ b/eden/integration/redirect_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import json
 import os
 import subprocess
diff --git a/eden/integration/remount_test.py b/eden/integration/remount_test.py
index 65d235fb9a985..e31744f6e3216 100644
--- a/eden/integration/remount_test.py
+++ b/eden/integration/remount_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import json
 import os
 
diff --git a/eden/integration/rename_test.py b/eden/integration/rename_test.py
index d7d9f235fe449..6f324a2526f7b 100644
--- a/eden/integration/rename_test.py
+++ b/eden/integration/rename_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 import time
diff --git a/eden/integration/restart_test.py b/eden/integration/restart_test.py
index 73df250067a0f..c11b4a294e90b 100644
--- a/eden/integration/restart_test.py
+++ b/eden/integration/restart_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import subprocess
 import sys
 import typing
diff --git a/eden/integration/rocksdb_store_test.py b/eden/integration/rocksdb_store_test.py
index f66d9fc65ed50..ad934efbf516b 100644
--- a/eden/integration/rocksdb_store_test.py
+++ b/eden/integration/rocksdb_store_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import re
 from typing import Dict, Optional
 
diff --git a/eden/integration/sed_test.py b/eden/integration/sed_test.py
index 9f60fdbc348b5..0e3fc6914fa51 100644
--- a/eden/integration/sed_test.py
+++ b/eden/integration/sed_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import stat
 import subprocess
diff --git a/eden/integration/service_log_test.py b/eden/integration/service_log_test.py
index cc36ddbe948f3..84d59b22b84de 100644
--- a/eden/integration/service_log_test.py
+++ b/eden/integration/service_log_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import pathlib
 
 from .lib.service_test_case import fake_service_test, service_test, ServiceTestCaseBase
diff --git a/eden/integration/setattr_test.py b/eden/integration/setattr_test.py
index a3bf72edcf2b8..6b51adccc8192 100644
--- a/eden/integration/setattr_test.py
+++ b/eden/integration/setattr_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 import stat
diff --git a/eden/integration/snapshot/gen_snapshot.py b/eden/integration/snapshot/gen_snapshot.py
index 92111cf8c0dd2..0c88da1e5dd91 100644
--- a/eden/integration/snapshot/gen_snapshot.py
+++ b/eden/integration/snapshot/gen_snapshot.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import argparse
 import logging
 import sys
diff --git a/eden/integration/snapshot/inode_metadata.py b/eden/integration/snapshot/inode_metadata.py
index fb04ea2b76c34..f9b4d0266c95e 100644
--- a/eden/integration/snapshot/inode_metadata.py
+++ b/eden/integration/snapshot/inode_metadata.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import struct
 import tempfile
diff --git a/eden/integration/snapshot/snapshot.py b/eden/integration/snapshot/snapshot.py
index 27b2a9ba5d379..d02b1b6be217c 100644
--- a/eden/integration/snapshot/snapshot.py
+++ b/eden/integration/snapshot/snapshot.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import contextlib
 import datetime
diff --git a/eden/integration/snapshot/test_snapshots.py b/eden/integration/snapshot/test_snapshots.py
index 48fcc210b256e..8fc12052ccdc5 100644
--- a/eden/integration/snapshot/test_snapshots.py
+++ b/eden/integration/snapshot/test_snapshots.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import stat
 import unittest
diff --git a/eden/integration/snapshot/types/basic.py b/eden/integration/snapshot/types/basic.py
index cf5c1191c7944..b85a59b7330f3 100644
--- a/eden/integration/snapshot/types/basic.py
+++ b/eden/integration/snapshot/types/basic.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 from eden.integration.lib import edenclient
 from eden.integration.snapshot import verify as verify_mod
 from eden.integration.snapshot.snapshot import HgSnapshot, snapshot_class
diff --git a/eden/integration/snapshot/unpack_snapshot.py b/eden/integration/snapshot/unpack_snapshot.py
index 4c90889276ee1..aa0b6f36129ab 100644
--- a/eden/integration/snapshot/unpack_snapshot.py
+++ b/eden/integration/snapshot/unpack_snapshot.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import argparse
 import os
 from pathlib import Path
diff --git a/eden/integration/stale_test.py b/eden/integration/stale_test.py
index 7d062a249da80..2fc1a4a56e4c5 100644
--- a/eden/integration/stale_test.py
+++ b/eden/integration/stale_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 import subprocess
diff --git a/eden/integration/start_test.py b/eden/integration/start_test.py
index 87e28940f7851..be5237adebd63 100644
--- a/eden/integration/start_test.py
+++ b/eden/integration/start_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import pathlib
 import subprocess
diff --git a/eden/integration/stats_test.py b/eden/integration/stats_test.py
index 4428f6ff4a80a..7fea92748a7dd 100644
--- a/eden/integration/stats_test.py
+++ b/eden/integration/stats_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import logging
 import os
 import sys
diff --git a/eden/integration/stop_test.py b/eden/integration/stop_test.py
index 2f52602da58c8..4ad1d12633747 100644
--- a/eden/integration/stop_test.py
+++ b/eden/integration/stop_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import contextlib
 import os
 import signal
diff --git a/eden/integration/takeover_test.py b/eden/integration/takeover_test.py
index e792b1f440ff8..f4458de6b646c 100644
--- a/eden/integration/takeover_test.py
+++ b/eden/integration/takeover_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import signal
 import subprocess
diff --git a/eden/integration/thrift_test.py b/eden/integration/thrift_test.py
index cec595bc02750..414aed9301e13 100644
--- a/eden/integration/thrift_test.py
+++ b/eden/integration/thrift_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import binascii
 import hashlib
 import os
diff --git a/eden/integration/unixsocket_test.py b/eden/integration/unixsocket_test.py
index d11fd11a34c09..af683e6a691e9 100644
--- a/eden/integration/unixsocket_test.py
+++ b/eden/integration/unixsocket_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import select
 import socket
diff --git a/eden/integration/unlink_test.py b/eden/integration/unlink_test.py
index ab07f83c2d986..e6716a2ab47c8 100644
--- a/eden/integration/unlink_test.py
+++ b/eden/integration/unlink_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import errno
 import os
 import shutil
diff --git a/eden/integration/userinfo_test.py b/eden/integration/userinfo_test.py
index 543df68002755..58971d4012a53 100644
--- a/eden/integration/userinfo_test.py
+++ b/eden/integration/userinfo_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import subprocess
 import unittest
diff --git a/eden/integration/windows_fsck_test.py b/eden/integration/windows_fsck_test.py
index 5900605367c18..bfd7ad2ffc73e 100644
--- a/eden/integration/windows_fsck_test.py
+++ b/eden/integration/windows_fsck_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import os
 import shutil
 import subprocess
diff --git a/eden/integration/xattr_test.py b/eden/integration/xattr_test.py
index ca19b9fcb6517..e16fbaace7a94 100644
--- a/eden/integration/xattr_test.py
+++ b/eden/integration/xattr_test.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import hashlib
 import os
 from typing import Dict
diff --git a/eden/mononoke/tests/integration/get_free_socket.py b/eden/mononoke/tests/integration/get_free_socket.py
index 3599385808940..aabcf6994bf51 100755
--- a/eden/mononoke/tests/integration/get_free_socket.py
+++ b/eden/mononoke/tests/integration/get_free_socket.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 # From https://unix.stackexchange.com/questions/55913/whats-the-easiest-way-to-find-an-unused-local-port
 
 import socket
diff --git a/eden/mononoke/tests/integration/integration_runner_real.py b/eden/mononoke/tests/integration/integration_runner_real.py
index 0e13a705da92f..d79f3b435bd16 100755
--- a/eden/mononoke/tests/integration/integration_runner_real.py
+++ b/eden/mononoke/tests/integration/integration_runner_real.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 """Runner for Mononoke/Mercurial integration tests."""
 
 import json
diff --git a/eden/mononoke/tests/integration/urlencode.py b/eden/mononoke/tests/integration/urlencode.py
index 0e34c9dbfd781..c805593945894 100755
--- a/eden/mononoke/tests/integration/urlencode.py
+++ b/eden/mononoke/tests/integration/urlencode.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import sys
 from urllib.parse import quote, unquote
 
diff --git a/eden/mononoke/tests/utils/generate_buck_target_deps.py b/eden/mononoke/tests/utils/generate_buck_target_deps.py
index 687a807efda20..94ac9257e2705 100644
--- a/eden/mononoke/tests/utils/generate_buck_target_deps.py
+++ b/eden/mononoke/tests/utils/generate_buck_target_deps.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import argparse
 import subprocess
 
diff --git a/eden/scm/gen_version.py b/eden/scm/gen_version.py
index 5c127afe88361..a9bf97e4ddb45 100755
--- a/eden/scm/gen_version.py
+++ b/eden/scm/gen_version.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import argparse
 import errno
 import hashlib
diff --git a/eden/scm/hgcache_size_logger/hgcache_size_logger.py b/eden/scm/hgcache_size_logger/hgcache_size_logger.py
index 15abbc9853362..1f1095a5b1376 100644
--- a/eden/scm/hgcache_size_logger/hgcache_size_logger.py
+++ b/eden/scm/hgcache_size_logger/hgcache_size_logger.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import argparse
 import logging
 import os
diff --git a/eden/scm/lib/python-modules/buck_pymain.py b/eden/scm/lib/python-modules/buck_pymain.py
index 6b4045f4f568f..791b1f99afc6c 100644
--- a/eden/scm/lib/python-modules/buck_pymain.py
+++ b/eden/scm/lib/python-modules/buck_pymain.py
@@ -3,6 +3,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 # Pick the "right" python to execute the script in stdin.
 # This should match the python linked with "hgmain" in buck build.
 import os
diff --git a/eden/test_support/async_case_backport.py b/eden/test_support/async_case_backport.py
index 2d62589b5e142..9ac3ead13fd5d 100644
--- a/eden/test_support/async_case_backport.py
+++ b/eden/test_support/async_case_backport.py
@@ -13,6 +13,8 @@
 # @nolint
 # fmt: off
 
+# pyre-unsafe
+
 
 import asyncio
 import inspect
diff --git a/eden/test_support/environment_variable.py b/eden/test_support/environment_variable.py
index e90414c4f7cb8..e8e31d73cac1f 100644
--- a/eden/test_support/environment_variable.py
+++ b/eden/test_support/environment_variable.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import abc
 import contextlib
 import os
diff --git a/eden/test_support/testcase.py b/eden/test_support/testcase.py
index ca0cbcd616743..17129593c669d 100644
--- a/eden/test_support/testcase.py
+++ b/eden/test_support/testcase.py
@@ -4,6 +4,8 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2.
 
+# pyre-unsafe
+
 import contextlib
 import sys
 import unittest