diff --git a/src/pyaro_readers/actrisebas/ActrisEbasReader.py b/src/pyaro_readers/actrisebas/ActrisEbasReader.py
index 4fead46..d008909 100644
--- a/src/pyaro_readers/actrisebas/ActrisEbasReader.py
+++ b/src/pyaro_readers/actrisebas/ActrisEbasReader.py
@@ -76,7 +76,7 @@ class ActrisEbasTestDataNotFoundException(Exception):
 class ActrisEbasTimeSeriesReader(AutoFilterReaderEngine.AutoFilterReader):
     def __init__(
         self,
-            vars_to_read: list[str] = None,
+        vars_to_read: list[str] = None,
         filters=[],
         tqdm_desc: str | None = None,
         ts_type: str = "daily",
@@ -193,7 +193,7 @@ def metadata(self):
 
     def read_data(
         self,
-            actris_variable: str,
+        actris_variable: str,
         urls_to_dl: dict,
         tqdm_desc="reading stations",
     ):
@@ -225,8 +225,8 @@ def read_data(
                 ):
                     # look for a standard_name match and return only that variable
                     if (
-                            self.get_ebas_data_standard_name(tmp_data, _data_var)
-                            not in self._standard_names[actris_variable]
+                        self.get_ebas_data_standard_name(tmp_data, _data_var)
+                        not in self._standard_names[actris_variable]
                     ):
                         logger.info(
                             f"station {site_name}, file #{f_idx}: skipping variable {_data_var} due to wrong standard name"
diff --git a/tests/test_ActrisEbasReader.py b/tests/test_ActrisEbasReader.py
index 394ca78..9c5caff 100644
--- a/tests/test_ActrisEbasReader.py
+++ b/tests/test_ActrisEbasReader.py
@@ -63,8 +63,8 @@ def test_api_reading_small_data_set(self):
         engine = pyaro.list_timeseries_engines()[self.engine]
         #
         with engine.open(
-                filters=filters,
-                vars_to_read=self.vars_to_read,
+            filters=filters,
+            vars_to_read=self.vars_to_read,
         ) as ts:
             self.assertGreaterEqual(len(ts.variables()), 1)
             self.assertEqual(len(ts.stations()), 2)
@@ -84,9 +84,9 @@ def test_api_reading_pyaerocom_naming(self):
         engine = pyaro.list_timeseries_engines()[self.engine]
         #
         with engine.open(
-                filters=filters,
-                vars_to_read=self.pyaerocom_vars_to_read,
-                test_flag=True,
+            filters=filters,
+            vars_to_read=self.pyaerocom_vars_to_read,
+            test_flag=True,
         ) as ts:
             self.assertGreaterEqual(len(ts.variables()), 1)
             self.assertEqual(len(ts.stations()), 2)