diff --git a/.github/workflows/api.yaml b/.github/workflows/api.yaml
index 6946f5f027f..e71959b988c 100644
--- a/.github/workflows/api.yaml
+++ b/.github/workflows/api.yaml
@@ -28,6 +28,7 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.7']
+        chunk: [0, 1]
     services:
       postgres:
         image: postgres:13
@@ -63,7 +64,7 @@ jobs:
           path: 'galaxy root/.venv'
           key: gxy-venv-${{ runner.os }}-${{ steps.full-python-version.outputs.version }}-${{ hashFiles('galaxy root/requirements.txt') }}-api
       - name: Run tests
-        run: ./run_tests.sh --coverage --skip_flakey_fails -api
+        run: ./run_tests.sh --coverage --skip_flakey_fails -api lib/galaxy_test/api -- --num-shards=2 --shard-id=${{ matrix.chunk }}
         working-directory: 'galaxy root'
       - uses: codecov/codecov-action@v2
         with:
@@ -72,5 +73,5 @@ jobs:
       - uses: actions/upload-artifact@v3
         if: failure()
         with:
-          name: API test results (${{ matrix.python-version }})
+          name: API test results (${{ matrix.python-version }}, ${{ matrix.chunk }})
           path: 'galaxy root/run_api_tests.html'