Correct tests

tests/utilities.py

@@ -62,6 +62,8 @@ def compare_files(path1, path2):
                     if not ignore:
                         print("> {} : source and ref differ at line {}".format(path1, linecount))
                         return False
+    return True
+
 
 def clean_sources(sources_path):
     print("Clean the sources")