diff --git a/gnes/encoder/base.py b/gnes/encoder/base.py
index cff40538..cbd0edfa 100644
--- a/gnes/encoder/base.py
+++ b/gnes/encoder/base.py
@@ -49,6 +49,7 @@ def encode(self, text: List[str], *args, **kwargs) -> Union[Tuple, np.ndarray]:
 
 
 class BaseNumericEncoder(BaseEncoder):
+    """Note that all NumericEncoder can not be used as the first encoder of the pipeline"""
 
     def encode(self, data: np.ndarray, *args, **kwargs) -> np.ndarray:
         pass
diff --git a/tests/test_flair_encoder.py b/tests/test_flair_encoder.py
index 6a4aef86..798c2eb6 100644
--- a/tests/test_flair_encoder.py
+++ b/tests/test_flair_encoder.py
@@ -17,15 +17,14 @@ def setUp(self):
                 if line:
                     self.test_str.append(line)
 
-        self.flair_encoder = FlairEncoder(
-            model_name=os.environ.get('FLAIR_CI_MODEL'),
-            pooling_strategy="REDUCE_MEAN")
+        self.flair_encoder = FlairEncoder(model_name=os.environ.get('FLAIR_CI_MODEL'))
 
     @unittest.SkipTest
     def test_encoding(self):
-        vec = self.flair_encoder.encode(self.test_str)
-        self.assertEqual(vec.shape[0], len(self.test_str))
-        self.assertEqual(vec.shape[1], 512)
+        vec = self.flair_encoder.encode(self.test_str[:2])
+        print(vec.shape)
+        self.assertEqual(vec.shape[0], 2)
+        self.assertEqual(vec.shape[1], 4196)
 
     @unittest.SkipTest
     def test_dump_load(self):