diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 686007b..cf725f5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,9 +37,9 @@ jobs:
       # Any env name which does not start with `pyXY` will use this Python version.
       default_python: '3.12'
       envs: |
-        - linux: py310-test-parallel-cov
-        - linux: py311-test-parallel-cov
-        - linux: py312-test-parallel-cov
+        - linux: py310-test-devdeps-parallel-cov
+        - linux: py311-test-devdeps-parallel-cov
+        - linux: py312-test-devdeps-parallel-cov
       coverage: codecov
 
   asdf-schemas:
@@ -86,19 +86,19 @@ jobs:
         - linux: py313-test-devdeps-parallel
         - linux: py312-test-devdeps-numpydev-parallel
 
-  oldest:
-    needs: [core, asdf-schemas]
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@9f1f43251dde69da8613ea8e11144f05cdea41d5  # v1.15.0
-    with:
-      cache-path: ~/.cache/pip
-      cache-key: pip-${{ needs.setup.outputs.requirements-hash }}
-      cache-restore-keys: |
-        pip-
-      # Any env name which does not start with `pyXY` will use this Python version.
-      default_python: '3.10'
-      envs: |
-        - linux: py310-test-oldestdeps-parallel-cov
-      coverage: codecov
+  # oldest:
+  #   needs: [core, asdf-schemas]
+  #   uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@9f1f43251dde69da8613ea8e11144f05cdea41d5  # v1.15.0
+  #   with:
+  #     cache-path: ~/.cache/pip
+  #     cache-key: pip-${{ needs.setup.outputs.requirements-hash }}
+  #     cache-restore-keys: |
+  #       pip-
+  #     # Any env name which does not start with `pyXY` will use this Python version.
+  #     default_python: '3.10'
+  #     envs: |
+  #       - linux: py310-test-oldestdeps-parallel-cov
+  #     coverage: codecov
 
   wheel_building:
     permissions:
diff --git a/tox.ini b/tox.ini
index 85b9a1b..31622ce 100644
--- a/tox.ini
+++ b/tox.ini
@@ -35,7 +35,7 @@ extras =
 commands_pre=
     numpydev: pip install -U --pre -i https://pypi.anaconda.org/scientific-python-nightly-wheels/simple numpy
     devdeps: pip install -U --pre -i https://pypi.anaconda.org/liberfa/simple pyerfa
-    devdeps: pip install -U --pre -i https://pypi.anaconda.org/astropy/simple astropy
+    devdeps: pip install -U --pre -i git+https://github.com/lpsinger/astropy@masked-classes-importable
 
     # Generate `requiremments-min.txt`
     oldestdeps: minimum_dependencies asdf-astropy --filename {envtmpdir}/requirements-min.txt