diff --git a/.cruft.json b/.cruft.json
index 59435dd..65485b0 100644
--- a/.cruft.json
+++ b/.cruft.json
@@ -9,7 +9,7 @@
       "short_description": "Atomic and molecular opacities from MAESTRO",
       "author_name": "Brett Morris",
       "author_email": "morrisbrettm@gmail.com",
-      "project_url": "https://github.com/bmorris3/opacity",
+      "project_url": "https://github.com/opacities/opacity",
       "license": "Other",
       "minimum_python_version": "3.11",
       "use_compiled_extensions": "n",
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c55549e..0426ed7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,21 +13,21 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  test:
+  ci_tests:
     uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
     with:
       envs: |
-        - name: tests, py3.11
+        - name: py3.11
           linux: test
           os: ubuntu-latest
           python-version: 3.11
 
-        - name: tests, py3.12
+        - name: py3.12
           linux: test
           os: ubuntu-latest
           python-version: 3.12
 
-        - name: tests, py3.13
+        - name: py3.13
           linux: test
           os: ubuntu-latest
           python-version: 3.13
@@ -35,4 +35,35 @@ jobs:
         - name: Code style checks
           python: 3.11
           os: ubuntu-latest
-          linux: codestyle
\ No newline at end of file
+          linux: codestyle
+
+        - name: py3.12 with coverage
+          linux: test
+          os: ubuntu-latest
+          python: '3.12'
+          toxenv: py312-test-cov
+          toxposargs: --remote-data
+
+  cov:
+    name: Coverage
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+
+      - name: Install dependencies
+        run: 
+          pip install pytest pytest-cov pytest-doctestplus pytest-remotedata .
+
+      - name: Run tests
+        run: pytest --cov --cov-branch --cov-report=xml
+
+      - name: Upload results to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/tox.ini b/tox.ini
index bc0564c..009b3de 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 min_version = 4.0
 envlist =
-    py{310,311,312}-test
+    py{310,311,312}-test{,-cov}
     py10-test-oldestdeps
     build_docs
 
@@ -17,6 +17,7 @@ envlist =
 description =
     run tests
     oldestdeps: with the oldest supported version of key dependencies
+    cov: and test coverage
 
 # Pass through the following environment variables which may be needed for the CI
 pass_env =
@@ -52,7 +53,10 @@ commands_pre =
     pip freeze
 
 commands =
-    pytest --pyargs opacity --cov opacity --cov-report xml:coverage.xml --cov-report term-missing {posargs}
+    pip freeze
+    !cov: pytest --pyargs opacity {toxinidir}/docs {posargs} --durations=30
+    cov: pytest --pyargs opacity {toxinidir}/docs --cov opacity --cov-config={toxinidir}/pyproject.toml {posargs} --durations=30
+    cov: coverage xml -o {toxinidir}/coverage.xml
 
 [testenv:build_docs]
 description = invoke sphinx-build to build the HTML docs