@@ -141,12 +141,12 @@
 					 @"file://testfile.txt"]
 			   encoding: OF_STRING_ENCODING_ISO_8859_1]) &&
 	    [s[1] isEqual: @"testäöü"])
 
 	TEST(@"-[appendCStringWithLength:]",
-	    R([s[0] appendCString: "foobarqux" + 3
-		       withLength: 3]) && [s[0] isEqual: @"foobar"])
+	    R([s[0] appendCString: "foo\xEF\xBB\xBF" "barqux" + 3
+		       withLength: 6]) && [s[0] isEqual: @"foobar"])
 
 	EXPECT_EXCEPTION(@"Detection of invalid UTF-8 encoding #1",
 	    OFInvalidEncodingException,
 	    [OFString stringWithCString: "\xE0\x80"])
 	EXPECT_EXCEPTION(@"Detection of invalid UTF-8 encoding #2",