diff --git a/src/osekit/public_api/dataset.py b/src/osekit/public_api/dataset.py
index 5d2f02f9..fd63a085 100644
--- a/src/osekit/public_api/dataset.py
+++ b/src/osekit/public_api/dataset.py
@@ -394,8 +394,8 @@ def run_analysis(
         """
         if analysis.name in self.analyses:
             message = (
-                f"Analysis {analysis.name} already exists."
-                f"Please choose a different name,"
+                f"Analysis {analysis.name} already exists. "
+                f"Please choose a different name, "
                 f"or delete it with the Dataset.delete_analysis() method."
             )
             raise ValueError(message)
diff --git a/src/osekit/utils/core_utils.py b/src/osekit/utils/core_utils.py
index 3666c1ce..30c2bc1d 100644
--- a/src/osekit/utils/core_utils.py
+++ b/src/osekit/utils/core_utils.py
@@ -78,7 +78,7 @@ def change_owner_group(path: Path, owner_group: str) -> None:
         os.chown(path, -1, gid)
     except PermissionError as e:
         message = (
-            f"You do not have the permission to change the owner of {path}."
+            f"You do not have the permission to change the owner of {path}. "
             f"The group owner has not been changed "
             f"from {path.group()} to {owner_group}."
         )