---
 tests/test_serving.py |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Index: Werkzeug-2.2.3/tests/test_serving.py
===================================================================
--- Werkzeug-2.2.3.orig/tests/test_serving.py
+++ Werkzeug-2.2.3/tests/test_serving.py
@@ -10,6 +10,7 @@ from pathlib import Path
 
 import pytest
 
+import werkzeug
 from werkzeug import run_simple
 from werkzeug._reloader import _find_stat_paths
 from werkzeug._reloader import _find_watchdog_paths
@@ -128,12 +129,15 @@ def test_windows_get_args_for_reloading(
 @pytest.mark.filterwarnings("ignore::pytest.PytestUnraisableExceptionWarning")
 @pytest.mark.parametrize("find", [_find_stat_paths, _find_watchdog_paths])
 def test_exclude_patterns(find):
-    # Imported paths under sys.prefix will be included by default.
+    # Don’t use sys.prefix, we may have redefined PYTHONPATH and
+    # libraries elsewhere.
+    cur_prefix = str(Path(werkzeug.__file__).parents[1])
+    # Imported paths under cur_prefix will be included by default.
     paths = find(set(), set())
-    assert any(p.startswith(sys.prefix) for p in paths)
+    assert any(p.startswith(cur_prefix) for p in paths)
     # Those paths should be excluded due to the pattern.
-    paths = find(set(), {f"{sys.prefix}*"})
-    assert not any(p.startswith(sys.prefix) for p in paths)
+    paths = find(set(), {f"{str(cur_prefix)}*"})
+    assert not any(p.startswith(cur_prefix) for p in paths)
 
 
 @pytest.mark.filterwarnings("ignore::pytest.PytestUnraisableExceptionWarning")