diff --git a/tdd/common.py b/tdd/common.py
index 9a2c060..c4b6ef5 100644
--- a/tdd/common.py
+++ b/tdd/common.py
@@ -17,7 +17,7 @@
 import subprocess
 import json
 import re
-from flask import Response
+from flask import Response, abort
 
 
 from tdd.sparql import (
@@ -136,5 +136,6 @@ def get_id_description(uri, content_type, ontology):
     if not resp.text.strip() or not (
         re.search(r"^[^\#]", resp.text, re.MULTILINE)
     ):  # because some SPARQL endpoint may send "# Empty file" as response
-        raise IDNotFound()
+        #raise IDNotFound()
+        abort(404)
     return resp.text
diff --git a/tdd/errors.py b/tdd/errors.py
index 93aec4b..526e3e6 100644
--- a/tdd/errors.py
+++ b/tdd/errors.py
@@ -193,7 +193,7 @@ def __init__(self, ld_content):
 
 
 class IDNotFound(AppException):
-    title = "ID Not Found"
+    title = "Not found"
     status_code = 404