diff --git a/tests/api_workflow/test_api_workflow_upload_embeddings.py b/tests/api_workflow/test_api_workflow_upload_embeddings.py
index 4444d11d7..a3bb54c2b 100644
--- a/tests/api_workflow/test_api_workflow_upload_embeddings.py
+++ b/tests/api_workflow/test_api_workflow_upload_embeddings.py
@@ -4,11 +4,7 @@
 import numpy as np
 
 from lightly.utils import io as io_utils
-from lightly.utils.io import INVALID_FILENAME_CHARACTERS
-from tests.api_workflow.mocked_api_workflow_client import (
-    N_FILES_ON_SERVER,
-    MockedApiWorkflowSetup,
-)
+from tests.api_workflow.mocked_api_workflow_client import MockedApiWorkflowSetup
 
 
 class TestApiWorkflowUploadEmbeddings(MockedApiWorkflowSetup):
@@ -80,15 +76,6 @@ def test_upload_wrong_filenames(self):
         with self.assertRaises(ValueError):
             self.t_ester_upload_embedding(n_data=n_data, special_name_first_sample=True)
 
-    def test_upload_comma_filenames(self):
-        n_data = len(self.api_workflow_client._mappings_api.sample_names)
-        for invalid_char in INVALID_FILENAME_CHARACTERS:
-            with self.subTest(msg=f"invalid_char: {invalid_char}"):
-                with self.assertRaises(ValueError):
-                    self.t_ester_upload_embedding(
-                        n_data=n_data, special_char_in_first_filename=invalid_char
-                    )
-
     def test_set_embedding_id_default(self):
         self.api_workflow_client.set_embedding_id_to_latest()
         embeddings = (
diff --git a/tests/data/test_LightlyDataset.py b/tests/data/test_LightlyDataset.py
index c5a1a7c6c..0b4c7b196 100644
--- a/tests/data/test_LightlyDataset.py
+++ b/tests/data/test_LightlyDataset.py
@@ -1,23 +1,18 @@
 import os
-import random
-import re
 import shutil
 import tempfile
 import unittest
-import warnings
 from typing import List, Tuple
 
 import numpy as np
-import torch
 import torchvision
 from PIL.Image import Image
 
 from lightly.data import LightlyDataset
 from lightly.data._utils import check_images
-from lightly.utils.io import INVALID_FILENAME_CHARACTERS
 
 try:
-    import av
+    import av as _
     import cv2
 
     from lightly.data._video import VideoDataset
@@ -137,24 +132,6 @@ def test_create_lightly_dataset_from_folder_nosubdir(self):
         for i in range(n_tot):
             sample, target, fname = dataset[i]
 
-    def test_create_lightly_dataset_with_invalid_char_in_filename(self):
-        # create a dataset
-        n_tot = 100
-        dataset = torchvision.datasets.FakeData(size=n_tot, image_size=(3, 32, 32))
-
-        for invalid_char in INVALID_FILENAME_CHARACTERS:
-            with self.subTest(msg=f"invalid_char: {invalid_char}"):
-                tmp_dir = tempfile.mkdtemp()
-                sample_names = [f"img_,_{i}.jpg" for i in range(n_tot)]
-                for sample_idx in range(n_tot):
-                    data = dataset[sample_idx]
-                    path = os.path.join(tmp_dir, sample_names[sample_idx])
-                    data[0].save(path)
-
-                    # create lightly dataset
-                    with self.assertRaises(ValueError):
-                        dataset = LightlyDataset(input_dir=tmp_dir)
-
     def test_check_images(self):
         # create a dataset
         tmp_dir = tempfile.mkdtemp()