diff --git a/Tests/base/NSString/noncharacter.m b/Tests/base/NSString/noncharacter.m
index 2b72c8ca7..83a22782f 100644
--- a/Tests/base/NSString/noncharacter.m
+++ b/Tests/base/NSString/noncharacter.m
@@ -9,6 +9,18 @@ int main(int argc, char **argv)
   NSString *str;
   unichar u;
 
+  u = (unichar)0xfffd;
+  str = [[NSString alloc] initWithCharacters: &u length: 1];
+  PASS([str length] == 1, "fffd codpepoint is permitted in string");
+  PASS([str characterAtIndex: 0] == 0xfffd, "fffd is returned properly");
+  [str release];
+
+  u = (unichar)0xfffe;
+  str = [[NSString alloc] initWithCharacters: &u length: 1];
+  PASS([str length] == 1, "fffe codpepoint is permitted in string");
+  PASS([str characterAtIndex: 0] == 0xfffe, "fffe is returned properly");
+  [str release];
+
   u = (unichar)0xffff;
   str = [[NSString alloc] initWithCharacters: &u length: 1];
   PASS([str length] == 1, "ffff codpepoint is permitted in string");