diff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -332,6 +332,8 @@
     def test_forced_io_encoding(self):
         # Checks forced configuration of embedded interpreter IO streams
         out, err = self.run_embedded_interpreter("forced_io_encoding")
+        out = os.linesep.join(out.splitlines())
+        err = os.linesep.join(err.splitlines())
         if support.verbose:
             print()
             print(out)