diff --git a/.github/codecov.yml b/.github/codecov.yml
index c61872c..c2ea6d3 100644
--- a/.github/codecov.yml
+++ b/.github/codecov.yml
@@ -1,6 +1,6 @@
 # Configuration for Codecov: https://docs.codecov.com/docs/codecov-yaml
 #
-# Coverage reports are generated by `nox -s coverage-<python>` and
+# Coverage reports are generated by `nox -s dagster_with_coverage` and
 # uploaded in .github/workflows/ci.yml.
 
 coverage:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e14e57..e9b5d88 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -55,15 +55,10 @@ jobs:
           python: '3.13'
           nox_session: tests-3.13
 
-        - name: Tests with code coverage, Python 3.12
-          os: ubuntu-latest
-          python: '3.12'
-          nox_session: coverage-3.12
-
-        - name: Tests with Dagster
+        - name: Tests with code coverage and Dagster, Python 3.14
           os: ubuntu-latest
           python: '3.14'
-          nox_session: dagster
+          nox_session: dagster_with_coverage
 
         - name: Tests, Python 3.11
           os: macos-latest
@@ -124,7 +119,7 @@ jobs:
       run: uv run noxfile.py --session '${{ matrix.nox_session }}'
 
     - name: Upload coverage reports to Codecov
-      if: ${{ contains(matrix.nox_session, 'cov') }}
+      if: ${{ matrix.nox_session == 'dagster_with_coverage' }}
       uses: codecov/codecov-action@v7.0.0
       with:
         files: ./coverage.xml
diff --git a/noxfile.py b/noxfile.py
index 1d55213..eff3fda 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -66,26 +66,21 @@ def tests(session: nox.Session) -> None:
 
 
 @nox_uv.session(uv_groups=["test", "dagster"], python=MAXPYTHON)
-def dagster(session: nox.Session) -> None:
+def dagster_with_coverage(session: nox.Session) -> None:
     """
-    Run the tests of logging with Dagster.
+    Run all tests, including Dagster tests, with code coverage.
 
     Dagster has many dependencies, so it is installed only for this
-    session. The ``tests`` session skips these tests.
-    """
-    session.install(".")
-    session.run("pytest", "tests/test_logging.py", "-k", "dagster", *session.posargs)
-
-
-@nox_uv.session(uv_groups=["test"], python=SUPPORTED_PYTHON_VERSIONS)
-def coverage(session: nox.Session) -> None:
-    """
-    Run tests with pytest and measure code coverage.
+    session. The ``tests`` session skips the Dagster tests.
 
     The project is installed in editable mode (by ``uv sync``) so that
     file paths in the coverage report point to ``src/``, which is
     needed for the report uploaded to Codecov to map onto the source.
 
+    In CI, reports are uploaded by ``codecov/codecov-action``. To upload
+    a report locally, set the ``CODECOV_TOKEN`` environment variable and
+    run ``uvx --from codecov-cli codecovcli upload-process``.
+
     Configuration: ``[tool.coverage]`` in pyproject.toml
     """
     session.run(