diff --git a/tox.ini b/tox.ini
index 13d0800b..8d5da39c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -49,12 +49,11 @@ deps =
     jwst: jwst[test] @ git+https://github.com/spacetelescope/jwst.git
     romancal: romancal[test] @ git+https://github.com/spacetelescope/romancal.git
     oldestdeps: minimum_dependencies
-    devdeps: astropy>=0.0.dev0
-    devdeps: numpy>=0.0.dev0
 pass_env =
     CRDS_*
     CI
 set_env =
+    devdeps: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/scipy-wheels-nightly/simple
     jwst: CRDS_SERVER_URL=https://jwst-crds.stsci.edu
     romancal: CRDS_SERVER_URL=https://roman-crds.stsci.edu
 package =
@@ -65,6 +64,7 @@ allowlist_externals =
 commands_pre =
     oldestdeps: minimum_dependencies stpipe --filename requirements-min.txt
     oldestdeps: pip install -r requirements-min.txt
+    devdeps: pip install numpy>=0.0.dev0 git+https://github.com/astropy/astropy.git#egg=astropy -U --upgrade-strategy eager
     pip freeze
 commands =
     pytest \