diff --git a/source/utf8/core.h b/source/utf8/core.h
index ec709f1..268cf7c 100644
--- a/source/utf8/core.h
+++ b/source/utf8/core.h
@@ -92,7 +92,7 @@ namespace internal
     template <typename u32>
     inline bool is_code_point_valid(u32 cp)
     {
-        return (cp <= CODE_POINT_MAX && !is_surrogate(cp) && cp != 0xfffe && cp != 0xffff);
+        return (cp <= CODE_POINT_MAX && !is_surrogate(cp));
     }
 
     template <typename octet_iterator>
diff --git a/test_data/negative/utf8_invalid.txt b/test_data/negative/utf8_invalid.txt
index abd16f7..ae83159 100755
Binary files a/test_data/negative/utf8_invalid.txt and b/test_data/negative/utf8_invalid.txt differ
diff --git a/test_drivers/negative/negative.cpp b/test_drivers/negative/negative.cpp
index 0497945..ea64cce 100644
--- a/test_drivers/negative/negative.cpp
+++ b/test_drivers/negative/negative.cpp
@@ -7,7 +7,7 @@ using namespace utf8;
 #include <algorithm>
 using namespace std;
 
-const unsigned INVALID_LINES[] = { 75, 76, 82, 83, 84, 85, 93, 102, 103, 105, 106, 107, 108, 109, 110, 114, 115, 116, 117, 124, 125, 130, 135, 140, 145, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 169, 175, 176, 177, 207, 208, 209, 210, 211, 220, 221, 222, 223, 224, 232, 233, 234, 235, 236, 247, 248, 249, 250, 251, 252, 253, 257, 258, 259, 260, 261, 262, 263, 264, 268, 269};
+const unsigned INVALID_LINES[] = { 75, 76, 82, 83, 84, 85, 93, 102, 103, 105, 106, 107, 108, 109, 110, 114, 115, 116, 117, 124, 125, 130, 135, 140, 145, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 169, 175, 176, 177, 207, 208, 209, 210, 211, 220, 221, 222, 223, 224, 232, 233, 234, 235, 236, 247, 248, 249, 250, 251, 252, 253, 257, 258, 259, 260, 261, 262, 263, 264};
 const unsigned* INVALID_LINES_END = INVALID_LINES + sizeof(INVALID_LINES)/sizeof(unsigned);
 
 int main(int argc, char** argv)
@@ -35,10 +35,10 @@ int main(int argc, char** argv)
             line.push_back(byte);
 
         line_count++;
-        // Print out lines that contain invalid UTF-8
+        bool expected_valid = (find(INVALID_LINES, INVALID_LINES_END, line_count) == INVALID_LINES_END);
+        // Print out lines that contain unexpected invalid UTF-8
         if (!is_valid(line.begin(), line.end())) {
-            const unsigned* u = find(INVALID_LINES, INVALID_LINES_END, line_count);
-            if (u == INVALID_LINES_END)
+            if (expected_valid)    
                 cout << "Unexpected invalid utf-8 at line " << line_count << '\n';
 
             // try fixing it:
@@ -47,5 +47,7 @@ int main(int argc, char** argv)
             if (!is_valid(fixed_line.begin(), fixed_line.end()))
                 cout << "replace_invalid() resulted in an invalid utf-8 at line " << line_count << '\n';
         }
+        else if (!expected_valid)
+            cout << "Invalid utf-8 NOT detected at line " << line_count << '\n';
     }
 }