diff --git a/src/spikeinterface/core/base.py b/src/spikeinterface/core/base.py
index abaa753c3d..ee7671c6ed 100644
--- a/src/spikeinterface/core/base.py
+++ b/src/spikeinterface/core/base.py
@@ -15,7 +15,14 @@
 import numpy as np
 
 from .globals import get_global_tmp_folder, is_set_global_tmp_folder
-from .core_tools import check_json, is_dict_extractor, SIJsonEncoder, make_paths_relative, make_paths_absolute, check_paths_relative
+from .core_tools import (
+    check_json,
+    is_dict_extractor,
+    SIJsonEncoder,
+    make_paths_relative,
+    make_paths_absolute,
+    check_paths_relative,
+)
 from .job_tools import _shared_job_kwargs_doc
 
 
@@ -446,10 +453,9 @@ def to_dict(
             else:
                 # A warning will be very annoying for end user.
                 # So let's switch back to absolute path, but silently!
-                # warnings.warn("Try to BaseExtractor.to_dict() using relative_to but there is no common folder")
+                # warnings.warn("Try to BaseExtractor.to_dict() using relative_to but there is no common folder")
                 dump_dict["relative_paths"] = False
 
-
         if folder_metadata is not None:
             if relative_to is not None:
                 folder_metadata = Path(folder_metadata).resolve().absolute().relative_to(relative_to)
@@ -1022,8 +1028,6 @@ def save_to_zarr(
         return cached
 
 
-
-
 def _load_extractor_from_dict(dic) -> BaseExtractor:
     """
     Convert a dictionary into an instance of BaseExtractor or its subclass.
diff --git a/src/spikeinterface/core/core_tools.py b/src/spikeinterface/core/core_tools.py
index 294c064cc3..442516dd75 100644
--- a/src/spikeinterface/core/core_tools.py
+++ b/src/spikeinterface/core/core_tools.py
@@ -851,13 +851,14 @@ def recursive_path_modifier(d, func, target="path", copy=True) -> dict:
                     raise ValueError(f"{k} key for path  must be str or list[str]")
 
 
-
 def _get_paths_list(d):
     # this explore a dict and get all paths flatten in a list
     # the trick is to use a closure func called by recursive_path_modifier()
     path_list = []
+
     def append_to_path(p):
         path_list.append(p)
+
     recursive_path_modifier(d, append_to_path, target="path", copy=True)
     return path_list
 
@@ -867,10 +868,11 @@ def _relative_to(p, relative_folder):
 
     relative_folder = Path(relative_folder).resolve()
     p = Path(p).resolve()
-    # the as_posix transform \\ to / on window which make better json files
+    # the as_posix transform \\ to / on window which make better json files
     rel_to = os.path.relpath(p.as_posix(), start=relative_folder.as_posix())
     return Path(rel_to).as_posix()
 
+
 def check_paths_relative(input_dict, relative_folder) -> bool:
     """
     Check if relative path is possible to be applied on a dict describing an BaseExtractor.
@@ -883,7 +885,7 @@ def check_paths_relative(input_dict, relative_folder) -> bool:
         A dict describing an extactor obtained by BaseExtractor.to_dict()
     relative_folder: str or Path
         The folder to be relative to.
-    
+
     Returns
     -------
     relative_possible: bool
@@ -894,7 +896,7 @@ def check_paths_relative(input_dict, relative_folder) -> bool:
     for p in path_list:
         p = Path(p)
         # check path is not an URL
-        if 'http' in str(p):
+        if "http" in str(p):
             not_possible.append(p)
             continue
 
@@ -905,14 +907,14 @@ def check_paths_relative(input_dict, relative_folder) -> bool:
             if p.resolve().absolute().drive != relative_folder.drive:
                 not_possible.append(p)
                 continue
-        
+
         # check relative is possible
         try:
             p2 = _relative_to(p, relative_folder)
         except ValueError:
             not_possible.append(p)
             continue
-    
+
     return len(not_possible) == 0
 
 
diff --git a/src/spikeinterface/core/tests/test_core_tools.py b/src/spikeinterface/core/tests/test_core_tools.py
index 7566863c8f..006fae5fb8 100644
--- a/src/spikeinterface/core/tests/test_core_tools.py
+++ b/src/spikeinterface/core/tests/test_core_tools.py
@@ -187,13 +187,12 @@ def test_path_utils_functions():
 
         d3 = make_paths_relative(d, Path("/yep"))
         assert d3["kwargs"]["path"] == "sub/path1"
-        assert d3["kwargs"]["recording"]["kwargs"]["path"]  == "sub/path2"
+        assert d3["kwargs"]["recording"]["kwargs"]["path"] == "sub/path2"
 
         d4 = make_paths_absolute(d3, "/yop")
         assert d4["kwargs"]["path"].startswith("/yop")
         assert d4["kwargs"]["recording"]["kwargs"]["path"].startswith("/yop")
 
-
     if platform.system() == "Windows":
         # test for windows Path
         d = {
@@ -212,7 +211,7 @@ def test_path_utils_functions():
         d2 = make_paths_relative(d, "c:\\yep")
         # the str be must unix like path even on windows for more portability
         assert d2["kwargs"]["path"] == "sub/path1"
-        assert d2["kwargs"]["recording"]["kwargs"]["path"]  == "sub/path2"
+        assert d2["kwargs"]["recording"]["kwargs"]["path"] == "sub/path2"
 
         # same drive
         assert check_paths_relative(d, r"c:\yep")
@@ -231,7 +230,6 @@ def test_path_utils_functions():
         assert check_paths_relative(d, r"\\host\share")
 
 
-
 if __name__ == "__main__":
     # Create a temporary folder using the standard library
     # import tempfile
@@ -239,6 +237,6 @@ def test_path_utils_functions():
     # with tempfile.TemporaryDirectory() as tmpdirname:
     #     tmp_path = Path(tmpdirname)
     #     test_write_binary_recording(tmp_path)
-        # test_write_memory_recording()
-    
+    # test_write_memory_recording()
+
     test_path_utils_functions()