diff --git a/Lib/test/test_bigaddrspace.py b/Lib/test/test_bigaddrspace.py
index b639f68c2347bf..aa1f8ca75a9811 100644
--- a/Lib/test/test_bigaddrspace.py
+++ b/Lib/test/test_bigaddrspace.py
@@ -55,7 +55,7 @@ def test_repeat(self):
 
 class StrTest(unittest.TestCase):
 
-    unicodesize = 2 if sys.maxunicode < 65536 else 4
+    unicodesize = 4
 
     @bigaddrspacetest
     def test_concat(self):
diff --git a/Tools/unicode/mkstringprep.py b/Tools/unicode/mkstringprep.py
index ead020c3a7a4bb..427188389a3b87 100644
--- a/Tools/unicode/mkstringprep.py
+++ b/Tools/unicode/mkstringprep.py
@@ -1,9 +1,6 @@
-import re, sys
+import re
 from unicodedata import ucd_3_2_0 as unicodedata
 
-if sys.maxunicode == 65535:
-    raise RuntimeError("need UCS-4 Python")
-
 def gen_category(cats):
     for i in range(0, 0x110000):
         if unicodedata.category(chr(i)) in cats: