diff --git a/reproduction/pos_tag_model/pos_io/pos_reader.py b/reproduction/pos_tag_model/pos_io/pos_reader.py
new file mode 100644
index 00000000..e69de29b
diff --git a/reproduction/pos_tag_model/process/pos_processor.py b/reproduction/pos_tag_model/process/pos_processor.py
index 6df4680c..2d6d2660 100644
--- a/reproduction/pos_tag_model/process/pos_processor.py
+++ b/reproduction/pos_tag_model/process/pos_processor.py
@@ -66,7 +66,7 @@ class PosOutputStrProcessor(Processor):
 
         self.word_field_name = word_field_name
         self.pos_field_name = pos_field_name
-        self.pos = '_'
+        self.sep = '_'
 
     def process(self, dataset):
         assert isinstance(dataset, DataSet), "Only Dataset class is allowed, not {}.".format(type(dataset))
diff --git a/reproduction/pos_tag_model/testcontext.py b/reproduction/pos_tag_model/testcontext.py
new file mode 100644
index 00000000..e69de29b