diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index ef1e1868..52bba03a 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -8,14 +8,17 @@ on: [push, pull_request]
 jobs:
   build:
     name: pytest (${{ matrix.python-version }}, ${{ matrix.os }})
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     defaults:
       run:
         shell: bash -l {0}
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
+    env:
+      FFMPEG_BINARY: /usr/bin/ffmpeg
+      IMAGEIO_FFMPEG_EXE: /usr/bin/ffmpeg
     steps:
     - uses: actions/checkout@v2
     - uses: conda-incubator/setup-miniconda@v2
@@ -24,8 +27,10 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Set up system dependencies
       run: |
+        sudo add-apt-repository ppa:savoury1/ffmpeg4
         sudo apt-get update
-        sudo apt-get install libavformat-dev libavfilter-dev libavdevice-dev ffmpeg libmp3lame-dev tesseract-ocr graphviz cmake libboost-python-dev libgraphviz-dev
+        sudo apt-get upgrade -y ffmpeg
+        sudo apt-get install -y libavformat-dev libavfilter-dev libavdevice-dev libmp3lame-dev tesseract-ocr graphviz cmake libboost-python-dev libgraphviz-dev
     - uses: actions/cache@v2
       with:
         path: ~/.cache/pip
diff --git a/optional-dependencies.txt b/optional-dependencies.txt
index bbe9c2dc..a33e5fbe 100644
--- a/optional-dependencies.txt
+++ b/optional-dependencies.txt
@@ -7,7 +7,6 @@ gensim
 google-api-python-client
 google-compute-engine
 librosa>=0.6.3
-numba<=0.48
 matplotlib
 opencv-python
 openpyxl
diff --git a/pliers/tests/test_io.py b/pliers/tests/test_io.py
index 63c443f0..f71c34a0 100644
--- a/pliers/tests/test_io.py
+++ b/pliers/tests/test_io.py
@@ -19,14 +19,15 @@ def test_magic_loader():
 
 def test_magic_loader2():
     text_file = join(get_test_data_path(), 'text', 'sample_text.txt')
-    video_url = 'https://archive.org/download/DisneyCastletest/Disney_Castle_512kb.mp4'
-    audio_url = 'https://archive.org/download/999WavFiles/TANKEN.WAV'
-    image_url = 'https://archive.org/download/NIX-C-1987-11903/1987_11903L.jpg'
+    video_url = 'http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4'
+    audio_url = 'https://www2.cs.uic.edu/~i101/SoundFiles/Fanfare60.wav'
+    image_url = 'https://storage.googleapis.com/gtv-videos-bucket/sample/images/ElephantsDream.jpg'
     text_url = 'https://github.com/psychoinformaticslab/pliers/blob/master/README.rst'
+
     stims = load_stims([text_file, video_url, audio_url, image_url, text_url])
     assert len(stims) == 5
-    assert stims[1].fps == 30.0
-    assert stims[3].data.shape == (288, 360, 3)
+    assert stims[1].fps == 24
+    assert stims[3].data.shape == (360, 480, 3)
 
 
 def test_loader_nonexistent():
diff --git a/pliers/tests/test_stims.py b/pliers/tests/test_stims.py
index 5c1478c0..6a1ad022 100644
--- a/pliers/tests/test_stims.py
+++ b/pliers/tests/test_stims.py
@@ -265,17 +265,17 @@ def test_transcribed_audio_stim():
 
 def test_remote_stims():
 
-    video_url = 'https://archive.org/download/DisneyCastletest/Disney_Castle_512kb.mp4'
+    video_url = 'http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4'
     video = VideoStim(url=video_url)
-    assert video.fps == 30.0
+    assert video.fps == 24
 
-    url = 'https://archive.org/download/999WavFiles/TANKEN.WAV'
+    url = 'https://www2.cs.uic.edu/~i101/SoundFiles/Fanfare60.wav'
     audio = AudioStim(url=url)
-    assert round(audio.duration) == 25
+    assert round(audio.duration) == 60
 
-    url = 'https://archive.org/download/NIX-C-1987-11903/1987_11903L.jpg'
+    url = 'https://storage.googleapis.com/gtv-videos-bucket/sample/images/ElephantsDream.jpg'
     image = ImageStim(url=url)
-    assert image.data.shape == (288, 360, 3)
+    assert image.data.shape == (360, 480, 3)
 
     url = 'https://github.com/psychoinformaticslab/pliers/blob/master/README.rst'
     text = TextStim(url=url)
@@ -283,13 +283,13 @@ def test_remote_stims():
 
 
 def test_get_filename():
-    url = 'https://archive.org/download/999WavFiles/TANKEN.WAV'
+    url = 'https://www2.cs.uic.edu/~i101/SoundFiles/Fanfare60.wav'
     audio = AudioStim(url=url)
     with audio.get_filename() as filename:
         assert exists(filename)
     assert not exists(filename)
 
-    url = 'https://archive.org/download/NIX-C-1987-11903/1987_11903L.jpg'
+    url = 'https://storage.googleapis.com/gtv-videos-bucket/sample/images/ElephantsDream.jpg'
     image = ImageStim(url=url)
     with image.get_filename() as filename:
         assert exists(filename)