diff --git a/Lib/test/test_curses.py b/Lib/test/test_curses.py
index 2615ffb..9273ba8 100644
--- a/Lib/test/test_curses.py
+++ b/Lib/test/test_curses.py
@@ -275,6 +275,8 @@
         curses.resetty()
 
 def test_main():
+    if not sys.stdout.isatty():
+        raise unittest.SkipTest("sys.stdout is not a tty")
     # testing setupterm() inside initscr/endwin
     # causes terminal breakage
     curses.setupterm(fd=sys.stdout.fileno())