diff --git a/src/spikeinterface/core/template.py b/src/spikeinterface/core/template.py
index 7aa4bb5b38..e248d43aea 100644
--- a/src/spikeinterface/core/template.py
+++ b/src/spikeinterface/core/template.py
@@ -459,24 +459,39 @@ def get_channel_locations(self) -> np.ndarray:
 
 class SharedMemoryTemplates(Templates):
 
-    def __init__(self, shm_name, shape, dtype, sampling_frequency, nbefore, sparsity_mask,
-                 channel_ids, unit_ids, probe, is_scaled, main_shm_owner=True):
+    def __init__(
+        self,
+        shm_name,
+        shape,
+        dtype,
+        sampling_frequency,
+        nbefore,
+        sparsity_mask,
+        channel_ids,
+        unit_ids,
+        probe,
+        is_scaled,
+        main_shm_owner=True,
+    ):
 
         assert len(shape) == 3
         assert shape[0] > 0, "SharedMemoryTemplates only supported with no empty templates"
 
         self.shm = SharedMemory(shm_name, create=False)
         templates_array = np.ndarray(shape=shape, dtype=dtype, buffer=self.shm.buf)
-        
-        Templates.__init__(self, templates_array=templates_array, 
-                           sampling_frequency=sampling_frequency, 
-                           nbefore=nbefore, 
-                           sparsity_mask=sparsity_mask,
-                           channel_ids=channel_ids, 
-                           unit_ids=unit_ids, 
-                           probe=probe, 
-                           is_scaled=is_scaled)
-        
+
+        Templates.__init__(
+            self,
+            templates_array=templates_array,
+            sampling_frequency=sampling_frequency,
+            nbefore=nbefore,
+            sparsity_mask=sparsity_mask,
+            channel_ids=channel_ids,
+            unit_ids=unit_ids,
+            probe=probe,
+            is_scaled=is_scaled,
+        )
+
         # self._serializability["memory"] = True
         # self._serializability["json"] = False
         # self._serializability["pickle"] = False
@@ -524,4 +539,4 @@ def from_templates(templates):
             main_shm_owner=True,
         )
         shm.close()
-        return shared_templates
\ No newline at end of file
+        return shared_templates
diff --git a/src/spikeinterface/core/tests/test_template_class.py b/src/spikeinterface/core/tests/test_template_class.py
index ee694892a1..b38d3cc2ca 100644
--- a/src/spikeinterface/core/tests/test_template_class.py
+++ b/src/spikeinterface/core/tests/test_template_class.py
@@ -170,6 +170,7 @@ def test_select_channels(template_type, is_scaled):
     if template.sparsity_mask is not None:
         assert np.array_equal(selected_template.sparsity_mask, template.sparsity_mask[:, selected_channel_ids_indices])
 
+
 @pytest.mark.parametrize("is_scaled", [True, False])
 @pytest.mark.parametrize("template_type", ["dense"])
 def test_shm_templates(template_type, is_scaled):
@@ -179,13 +180,12 @@ def test_shm_templates(template_type, is_scaled):
     # Verify that the channel ids match
     assert np.array_equal(shm_templates.channel_ids, template.channel_ids)
     # Verify that the templates data matches
-    assert np.array_equal(
-        shm_templates.templates_array, template.templates_array
-    )
+    assert np.array_equal(shm_templates.templates_array, template.templates_array)
 
     if template.sparsity_mask is not None:
         assert np.array_equal(shm_templates.sparsity_mask, template.sparsity_mask)
 
+
 if __name__ == "__main__":
     # test_json_serialization("sparse")
     test_json_serialization("dense")