diff --git a/src/spikeinterface/extractors/cellexplorersortingextractor.py b/src/spikeinterface/extractors/cellexplorersortingextractor.py
index b40b998103..31241a4147 100644
--- a/src/spikeinterface/extractors/cellexplorersortingextractor.py
+++ b/src/spikeinterface/extractors/cellexplorersortingextractor.py
@@ -40,7 +40,6 @@ def __init__(
         sampling_frequency: float | None = None,
         session_info_file_path: str | Path | None = None,
         spikes_matfile_path: str | Path | None = None,
-        session_info_matfile_path: str | Path | None = None,
     ):
         try:
             from pymatreader import read_mat
@@ -67,26 +66,6 @@ def __init__(
                 )
             file_path = spikes_matfile_path if file_path is None else file_path
 
-        if session_info_matfile_path is not None:
-            # Raise an error if the warning period has expired
-            deprecation_issued = datetime.datetime(2023, 4, 1)
-            deprecation_deadline = deprecation_issued + datetime.timedelta(days=180)
-            if datetime.datetime.now() > deprecation_deadline:
-                raise ValueError(
-                    "The session_info_matfile_path argument is no longer supported in. Use session_info_file_path instead."
-                )
-
-            # Otherwise, issue a DeprecationWarning
-            else:
-                warnings.warn(
-                    "The session_info_matfile_path argument is deprecated and will be removed in six months. "
-                    "Use session_info_file_path instead.",
-                    DeprecationWarning,
-                )
-            session_info_file_path = (
-                session_info_matfile_path if session_info_file_path is None else session_info_file_path
-            )
-
         self.spikes_cellinfo_path = Path(file_path)
         self.session_path = self.spikes_cellinfo_path.parent
         self.session_id = self.spikes_cellinfo_path.stem.split(".")[0]
diff --git a/src/spikeinterface/extractors/tests/test_cellexplorerextractor.py b/src/spikeinterface/extractors/tests/test_cellexplorerextractor.py
index 35de8a23e2..c4c8d0c993 100644
--- a/src/spikeinterface/extractors/tests/test_cellexplorerextractor.py
+++ b/src/spikeinterface/extractors/tests/test_cellexplorerextractor.py
@@ -26,7 +26,7 @@ class CellExplorerSortingTest(SortingCommonTestSuite, unittest.TestCase):
         (
             "cellexplorer/dataset_2/20170504_396um_0um_merge.spikes.cellinfo.mat",
             {
-                "session_info_matfile_path": local_folder
+                "session_info_file_path": local_folder
                 / "cellexplorer/dataset_2/20170504_396um_0um_merge.sessionInfo.mat"
             },
         ),