diff --git a/Lib/test/test_complex.py b/Lib/test/test_complex.py
index af495fb..c0ec50d 100644
--- a/Lib/test/test_complex.py
+++ b/Lib/test/test_complex.py
@@ -327,7 +327,7 @@
             print(a, b, file=fo)
             fo.close()
             fo = open(test_support.TESTFN, "rb")
-            self.assertEqual(fo.read(), "%s %s\n" % (a, b))
+            self.assertEqual(fo.read(), bytes("%s %s\n" % (a, b)))
         finally:
             if (fo is not None) and (not fo.closed):
                 fo.close()