Retry on failure

.github/workflows/testing.yml

@@ -63,6 +63,9 @@ jobs:
         name: Create and activate environment
         run: mamba env update -n nwb-guide -f ${{ matrix.label }}
 
+      - name: Display conda environment
+        run: conda list
+
       - name: Use Node.js 18
         uses: actions/setup-node@v3
         with:
@@ -73,12 +76,23 @@ jobs:
 
       - if: matrix.os != 'ubuntu-latest'
         name: Run tests
-        run: npm run test:coverage
+        uses: nick-fields/retry@v3
+        with:
+          timeout_minutes: 30
+          max_attempts: 3
+          retry_on: error
+          shell: bash
+          command: conda init && conda activate nwb-guide && npm run test:coverage
 
       - if: matrix.os == 'ubuntu-latest'
         name: Run tests with xvfb
-        run: xvfb-run --auto-servernum --server-args="-screen 0 1280x960x24" -- npm run test:coverage
-
+        uses: nick-fields/retry@v3
+        with:
+          timeout_minutes: 30
+          max_attempts: 3
+          retry_on: error
+          shell: bash
+          command: conda init && conda activate nwb-guide && xvfb-run --auto-servernum --server-args="-screen 0 1280x960x24" -- npm run test:coverage
 
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v3