Issue #12196: Make os.pipe2() flags argument mandatory.
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 421ea68..70a47b0 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -481,8 +481,8 @@
         self.assertRaises(TypeError, os.pipe2, 'DEADBEEF')
         self.assertRaises(TypeError, os.pipe2, 0, 0)
 
-        # try calling without flag, like os.pipe()
-        r, w = os.pipe2()
+        # try calling with flags = 0, like os.pipe()
+        r, w = os.pipe2(0)
         os.close(r)
         os.close(w)