Index: tests/test_io.py
--- tests/test_io.py.orig
+++ tests/test_io.py
@@ -102,7 +102,7 @@ def test_invalid_output_stream(sandwich, bio_class, ex
 
 @pytest.fixture
 def file_descriptor_is_open_for():
-    if sys.platform == 'win32' or sys.platform.startswith('freebsd'):
+    if sys.platform == 'win32' or sys.platform.startswith('freebsd') or sys.platform.startswith('openbsd'):
         pytest.skip(
             "psutil documentation warns that .open_files() has problems on these"
         )
