diff --git a/PyStemmusScope/bmi/variable_reference.py b/PyStemmusScope/bmi/variable_reference.py
index f931c91..2291c11 100644
--- a/PyStemmusScope/bmi/variable_reference.py
+++ b/PyStemmusScope/bmi/variable_reference.py
@@ -122,7 +122,7 @@ class BmiVariable:
         units="-",
         grid=0,
         keys=["gwfluxes", "indxRchrg"],
-    ),    
+    ),
     # groundwater (coupling) vars
     BmiVariable(
         name="groundwater_coupling_enabled",
@@ -159,5 +159,5 @@ class BmiVariable:
         units="cm",
         grid=0,
         keys=["GroundwaterSettings", "topLevel"],
-    ),           
+    ),
 )
diff --git a/PyStemmusScope/config_io.py b/PyStemmusScope/config_io.py
index 88c96c4..6c7bacd 100644
--- a/PyStemmusScope/config_io.py
+++ b/PyStemmusScope/config_io.py
@@ -137,6 +137,7 @@ def _copy_data(input_dir: Path, config: dict) -> None:
                 "Remove the key from the config file or provide the file."
             )
 
+
 def _update_config_file(
     input_dir: Path,
     output_dir: Path,