From 6574f59aa23f3a0fefec0ccf38511ae1bf64cf93 Mon Sep 17 00:00:00 2001
From: "David R. MacIver" <david@drmaciver.com>
Date: Thu, 31 Oct 2024 15:29:15 +0000
Subject: [PATCH] Fix environ setting on Windows

---
 hypothesis-python/tests/cover/test_settings.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/hypothesis-python/tests/cover/test_settings.py b/hypothesis-python/tests/cover/test_settings.py
index 085a0c8965..4d27ed8ac7 100644
--- a/hypothesis-python/tests/cover/test_settings.py
+++ b/hypothesis-python/tests/cover/test_settings.py
@@ -9,6 +9,7 @@
 # obtain one at https://mozilla.org/MPL/2.0/.
 
 import datetime
+import os
 import subprocess
 import sys
 from unittest import TestCase
@@ -520,6 +521,9 @@ def test_deprecated_settings_not_in_settings_all_list():
 
 
 def test_check_defaults_to_derandomize_when_running_on_ci():
+    env = dict(os.environ)
+    env["CI"] = "true"
+
     assert (
         subprocess.check_output(
             [
@@ -527,7 +531,7 @@ def test_check_defaults_to_derandomize_when_running_on_ci():
                 "-c",
                 "from hypothesis import settings\nprint(settings().derandomize)",
             ],
-            env={"CI": "true"},
+            env=env,
             text=True,
             encoding="utf-8",
         ).strip()
@@ -536,6 +540,9 @@ def test_check_defaults_to_derandomize_when_running_on_ci():
 
 
 def test_check_defaults_to_randomize_when_not_running_on_ci():
+    env = dict(os.environ)
+    env.pop("CI", None)
+    env.pop("TF_BUILD", None)
     assert (
         subprocess.check_output(
             [
@@ -543,7 +550,7 @@ def test_check_defaults_to_randomize_when_not_running_on_ci():
                 "-c",
                 "from hypothesis import settings\nprint(settings().derandomize)",
             ],
-            env={},
+            env=env,
             text=True,
             encoding="utf-8",
         ).strip()