Closes #16135: Removal of OS/2 support
diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index 6be259b..1b73634 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -15,7 +15,7 @@
 except ImportError:
     threading = None
 
-if sys.platform in ('os2', 'riscos'):
+if sys.platform == 'riscos':
     raise unittest.SkipTest("Can't test signal on %s" % sys.platform)