diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1bb46b1d..b0085936 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -56,5 +56,5 @@ jobs:
       cache-path: ${{ needs.environment.outputs.data_path }}/crds
       cache-key: crds-${{ needs.crds_contexts.outputs.roman }}
       envs: |
-        - linux: py311-romancal
+        - linux: py310-romancal
           coverage: codecov
diff --git a/tox.ini b/tox.ini
index ce507763..a7f994a4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -58,9 +58,12 @@ deps =
     rad: rad @ git+https://github.com/spacetelescope/rad.git@main#egg=rad
     romancal: romancal[test] @ git+{[main]rcal_repo}
     devdeps: -r requirements-dev.txt
+    oldestdeps: minimum_dependencies
 change_dir =
-    romancal: {env_tmp_dir}
+    romancal,oldestdeps: {env_tmp_dir}
 commands_pre =
+    oldestdeps: minimum_dependencies roman_datamodels --filename requirements-min.txt
+    oldestdeps: uv pip install -r requirements-min.txt
     {list_dependencies_command}
     romancal: git clone -n --depth=1 --filter=blob:none {[main]rcal_repo}
     romancal: git --git-dir={envtmpdir}/romancal/.git checkout HEAD pyproject.toml