diff --git a/src/dtscalibration/datastore.py b/src/dtscalibration/datastore.py
index bad8c89b..dc59e634 100644
--- a/src/dtscalibration/datastore.py
+++ b/src/dtscalibration/datastore.py
@@ -5417,8 +5417,7 @@ def func(a):
         return out
 
     def resample_datastore(*args, **kwargs):
-        raise "ds.resample_datastore() is deprecated. Use from dtscalibration import DataStore; " \
-              "DataStore(ds.resample()) instead. See example notebook 2."
+        raise "ds.resample_datastore() is deprecated. Use from dtscalibration import DataStore; " "DataStore(ds.resample()) instead. See example notebook 2."
 
 
 class ParameterIndexDoubleEnded:
@@ -6032,7 +6031,9 @@ def read_silixa_files(
     return ds
 
 
-def read_sensortran_files(directory, timezone_input_files="UTC", timezone_netcdf="UTC", silent=False, **kwargs):
+def read_sensortran_files(
+    directory, timezone_input_files="UTC", timezone_netcdf="UTC", silent=False, **kwargs
+):
     """Read a folder with measurement files from a device of the Sensortran
     brand. Each measurement file contains values for a single timestep. Remember
     to check which timezone you are working in.
diff --git a/src/dtscalibration/io.py b/src/dtscalibration/io.py
index 8f9b4738..e880a6ca 100644
--- a/src/dtscalibration/io.py
+++ b/src/dtscalibration/io.py
@@ -1201,7 +1201,11 @@ def metakey(meta, dict_to_parse, prefix):
 
 
 def read_sensortran_files_routine(
-    filepathlist_dts, filepathlist_temp, timezone_input_files="UTC", timezone_netcdf="UTC", silent=False
+    filepathlist_dts,
+    filepathlist_temp,
+    timezone_input_files="UTC",
+    timezone_netcdf="UTC",
+    silent=False,
 ):
     """
     Internal routine that reads sensortran files.
@@ -1419,7 +1423,11 @@ def read_sensortran_single(fname):
 
 
 def read_apsensing_files_routine(
-    filepathlist, timezone_input_files="UTC", timezone_netcdf="UTC", silent=False, load_in_memory="auto"
+    filepathlist,
+    timezone_input_files="UTC",
+    timezone_netcdf="UTC",
+    silent=False,
+    load_in_memory="auto",
 ):
     """
     Internal routine that reads AP Sensing files.
@@ -1443,7 +1451,9 @@ def read_apsensing_files_routine(
 
     import dask
 
-    assert timezone_input_files == "UTC" and timezone_netcdf == "UTC", "Only UTC timezones supported"
+    assert (
+        timezone_input_files == "UTC" and timezone_netcdf == "UTC"
+    ), "Only UTC timezones supported"
 
     # translate names
     tld = {"ST": "st", "AST": "ast", "REV-ST": "rst", "REV-AST": "rast", "TEMP": "tmp"}
diff --git a/tests/test_dtscalibration.py b/tests/test_dtscalibration.py
index 11830b77..2b86aa2d 100644
--- a/tests/test_dtscalibration.py
+++ b/tests/test_dtscalibration.py
@@ -825,7 +825,11 @@ def test_variance_of_stokes_linear_synthetic():
         resid,
         var_fun,
     ) = ds.variance_stokes_linear(
-        "c_lin_var_through_zero", sections=sections, nbin=10, through_zero=True, plot_fit=False
+        "c_lin_var_through_zero",
+        sections=sections,
+        nbin=10,
+        through_zero=True,
+        plot_fit=False,
     )
     assert_almost_equal_verbose(slope, var_slope, decimal=3)