diff --git a/.github/workflows/pytest_macos.yml b/.github/workflows/pytest_macos.yml
index aba92884..398538bf 100644
--- a/.github/workflows/pytest_macos.yml
+++ b/.github/workflows/pytest_macos.yml
@@ -59,7 +59,7 @@ jobs:
           pip install pytest-split
           pip install -r requirements.txt
           pip install -r dev_requirements.txt
-          mamba install -c conda-forge svmbir>=0.3.3
+          # mamba install -c conda-forge svmbir>=0.3.3
           mamba install -c astra-toolbox astra-toolbox
           mamba install -c conda-forge pyyaml
           pip install --upgrade --force-reinstall scipy>=1.6.0  # Temporary fix for GLIBCXX_3.4.30 not found in conda forge version
diff --git a/.github/workflows/pytest_ubuntu.yml b/.github/workflows/pytest_ubuntu.yml
index 5f9cb9c2..31d65367 100644
--- a/.github/workflows/pytest_ubuntu.yml
+++ b/.github/workflows/pytest_ubuntu.yml
@@ -81,7 +81,7 @@ jobs:
           pytest -x --cov --level=2 --durations-path=$DURATIONS_FILE --splits=5 --group=${{ matrix.group }} --pyargs scico
       # Upload coverage data
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: coverage${{ matrix.group }}
           path: .coverage
@@ -107,9 +107,10 @@ jobs:
           pip install coverage
       - name: Download all artifacts
         # Downloads coverage1, coverage2, etc.
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
       - name: Run coverage
         run: |
+          ls -R
           coverage combine coverage*/.coverage*
           coverage report
           coverage xml