diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -7708,12 +7708,6 @@
         /* All other characters are considered unencodable */
         collstart = p;
         collend = p+1;
-        while (collend < end) {
-            if ((0 < *collend && *collend < 256) ||
-                !Py_UNICODE_ISSPACE(*collend) ||
-                Py_UNICODE_TODECIMAL(*collend))
-                break;
-        }
         /* cache callback name lookup
          * (if not done yet, i.e. it's the first error) */
         if (known_errorHandler==-1) {