Streamline testing of beta/RC upstreams

.github/workflows/beta_rc.yaml

@@ -1,8 +1,8 @@
-name: Weekly test against upstream beta and RC builds
+name: Tests against beta/RC builds
 
 on:
   schedule:
-    - cron: "0 0 * * 0"
+    - cron: "0 3 * * 0"
   workflow_dispatch:
 
 defaults:
@@ -11,7 +11,7 @@ defaults:
 
 jobs:
   test:
-    name: Test beta and RC builds on on ${{ matrix.python-version }}
+    name: Test beta/RC builds on ${{ matrix.python-version }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -25,7 +25,6 @@ jobs:
     env:
       OE_LICENSE: ${{ github.workspace }}/oe_license.txt
       PYTEST_ARGS: -r fE --tb=short -nauto
-      COV: --cov=openff/toolkit --cov-config=setup.cfg --cov-append --cov-report=xml
 
     steps:
       - uses: actions/checkout@v4
@@ -35,7 +34,14 @@ jobs:
       - name: Install environment with ${{ env.JOBNAME }}
         uses: mamba-org/setup-micromamba@v1
         with:
-          environment-file: devtools/conda-envs/beta_rc_env.yaml
+          environment-file: devtools/conda-envs/test_env.yaml
+          condarc: |
+            channels:
+              - conda-forge/label/openmm_rc
+              - conda-forge/label/mdtraj_rc
+              - openeye/label/rc
+              - openeye
+              - conda-forge
           create-args: >-
             python=${{ matrix.python-version }}
 
@@ -67,15 +73,8 @@ jobs:
           PYTEST_ARGS+=" --ignore=openff/toolkit/_tests/test_examples.py"
           PYTEST_ARGS+=" --ignore=openff/toolkit/_tests/test_links.py"
           PYTEST_ARGS+=" --runslow"
-          pytest $PYTEST_ARGS $COV
+          pytest $PYTEST_ARGS
 
       - name: Run code snippets in docs
         run: |
           pytest -v --doctest-glob="docs/*.rst" --doctest-glob="docs/*.md" docs/
-
-      - name: Codecov
-        uses: codecov/codecov-action@v4
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          file: ./coverage.xml
-          fail_ci_if_error: true