Now re tests work again on Unicode-disabled build.
Simplified existing detections of Unicode-disabled build.
diff --git a/Lib/test/re_tests.py b/Lib/test/re_tests.py
index 25b1229..0cf9241 100755
--- a/Lib/test/re_tests.py
+++ b/Lib/test/re_tests.py
@@ -663,7 +663,7 @@
 
 try:
     u = eval("u'\N{LATIN CAPITAL LETTER A WITH DIAERESIS}'")
-except SyntaxError:
+except (SyntaxError, ValueError):
     pass
 else:
     tests.extend([