diff --git a/RecDP/pyrecdp/primitives/operations/text_split.py b/RecDP/pyrecdp/primitives/operations/text_split.py
index 67b06ca60..2ee11280e 100644
--- a/RecDP/pyrecdp/primitives/operations/text_split.py
+++ b/RecDP/pyrecdp/primitives/operations/text_split.py
@@ -21,7 +21,7 @@ def prepare_nltk_model(model, lang):
             import nltk
             nltk.download('punkt')
 
-        prepare_model(model_type="nltk", prepare_model_func=prepare_nltk_model)
+        prepare_model(model_type="nltk", model_key="nltk_langchain", prepare_model_func=prepare_nltk_model)
 
     from pyrecdp.core.class_utils import new_instance
     splitter = new_instance("langchain.text_splitter", text_splitter, **text_splitter_args)
diff --git a/RecDP/tests/test_llmutils_operations.py b/RecDP/tests/test_llmutils_operations.py
index 5a7c5c4df..c4bd41af2 100644
--- a/RecDP/tests/test_llmutils_operations.py
+++ b/RecDP/tests/test_llmutils_operations.py
@@ -228,10 +228,10 @@ def test_document_split_ray(self):
         with RayContext("tests/data/llm_data/tiny_c4_sample.jsonl") as ctx:
             ctx.show(op.process_rayds(ctx.ds))
 
-    # def test_rag_text_fix_ray(self):
-    #     op = RAGTextFix(chars_to_remove="abcdedfhijklmn")
-    #     with RayContext("tests/data/llm_data/tiny_c4_sample.jsonl") as ctx:
-    #         ctx.show(op.process_rayds(ctx.ds))
+    def test_rag_text_fix_ray(self):
+        op = RAGTextFix(chars_to_remove="abcdedfhijklmn")
+        with RayContext("tests/data/llm_data/tiny_c4_sample.jsonl") as ctx:
+            ctx.show(op.process_rayds(ctx.ds))
 
     ### ======  Spark ====== ###
 
@@ -393,10 +393,10 @@ def test_document_split_spark(self):
         with SparkContext("tests/data/llm_data/tiny_c4_sample.jsonl") as ctx:
             ctx.show(op.process_spark(ctx.spark, ctx.ds))
 
-    # def test_rag_text_fix_spark(self):
-    #     op = RAGTextFix(chars_to_remove="abcdedfhijklmn")
-    #     with SparkContext("tests/data/llm_data/tiny_c4_sample.jsonl") as ctx:
-    #         ctx.show(op.process_spark(ctx.spark, ctx.ds))
+    def test_rag_text_fix_spark(self):
+        op = RAGTextFix(chars_to_remove="abcdedfhijklmn")
+        with SparkContext("tests/data/llm_data/tiny_c4_sample.jsonl") as ctx:
+            ctx.show(op.process_spark(ctx.spark, ctx.ds))
 
     def test_document_embed_ray(self):
         model_root_path = os.path.join(RECDP_MODELS_CACHE, "huggingface")