diff --git a/antarest/study/common/studystorage.py b/antarest/study/common/studystorage.py
index baf8cef78e..96d8e34a75 100644
--- a/antarest/study/common/studystorage.py
+++ b/antarest/study/common/studystorage.py
@@ -38,7 +38,7 @@ def get(
             metadata: study
             url: path data inside study to reach
             depth: tree depth to reach after reach data path
-            format: Indicates the file return format. Can be 'json', 'arrow' or None. If so, the file will be returned as is.
+            format: Indicates the file return format. Can be 'json', 'arrow' or None. If None, the file will be returned as is.
 
         Returns: study data formatted in json
 
diff --git a/antarest/study/service.py b/antarest/study/service.py
index d79611b451..ae79c73e4b 100644
--- a/antarest/study/service.py
+++ b/antarest/study/service.py
@@ -311,7 +311,7 @@ def get(self, uuid: str, url: str, depth: int, params: RequestParameters, format
             uuid: study uuid
             url: route to follow inside study structure
             depth: depth to expand tree when route matched
-            format: Indicates the file return format. Can be 'json', 'arrow' or None. If so, the file will be returned as is.
+            format: Indicates the file return format. Can be 'json', 'arrow' or None. If None, the file will be returned as is.
             params: request parameters
 
         Returns: data study formatted in json
diff --git a/antarest/study/storage/abstract_storage_service.py b/antarest/study/storage/abstract_storage_service.py
index cbc1ab1523..53e9ff94da 100644
--- a/antarest/study/storage/abstract_storage_service.py
+++ b/antarest/study/storage/abstract_storage_service.py
@@ -125,7 +125,7 @@ def get(
             metadata: study
             url: path data inside study to reach
             depth: tree depth to reach after reach data path
-            format: Indicates the file return format. Can be 'json', 'arrow' or None. If so, the file will be returned as is.
+            format: Indicates the file return format. Can be 'json', 'arrow' or None. If None, the file will be returned as is.
             use_cache: indicate if the cache must be used
 
         Returns: study data formatted in json
diff --git a/antarest/study/storage/variantstudy/variant_study_service.py b/antarest/study/storage/variantstudy/variant_study_service.py
index 70f885e43c..b3f7f1879f 100644
--- a/antarest/study/storage/variantstudy/variant_study_service.py
+++ b/antarest/study/storage/variantstudy/variant_study_service.py
@@ -477,7 +477,7 @@ def get(
             metadata: study
             url: path data inside study to reach
             depth: tree depth to reach after reach data path
-            format: Indicates the file return format. Can be either Can be 'json', 'arrow' or None. If so, the file will be returned as is.
+            format: Indicates the file return format. Can be either Can be 'json', 'arrow' or None. If None, the file will be returned as is.
             use_cache: indicate if cache should be used
 
         Returns: study data formatted in json