diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 677b127..d41891c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,5 +38,6 @@ jobs:
         CRDS_CLIENT_RETRY_COUNT: 3
         CRDS_CLIENT_RETRY_DELAY_SECONDS: 20
       envs: |
-        - linux: py311-jwst-xdist
-        - linux: py311-romancal-xdist
+        - linux: py311-jwst-cov-xdist
+        - linux: py311-romancal-cov-xdist
+      coverage: codecov
diff --git a/tox.ini b/tox.ini
index b3ab63c..2871a25 100644
--- a/tox.ini
+++ b/tox.ini
@@ -41,13 +41,16 @@ description =
     warnings: treating warnings as errors
     cov: with coverage
     xdist: using parallel processing
+change_dir =
+    jwst,romancal: {env_tmp_dir}
+allowlist_externals =
+    git
+    jwst,romancal: bash
 extras =
     test
 deps =
     xdist: pytest-xdist
     cov: pytest-cov
-    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
     downstreamdeps: jwst
@@ -56,10 +59,14 @@ deps =
 pass_env =
     CRDS_*
     CI
+    romancal: WEBBPSF_PATH
 set_env =
     devdeps: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/astropy/simple https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
-    jwst: CRDS_SERVER_URL=https://jwst-crds.stsci.edu
-    downstreamdeps: CRDS_SERVER_URL=https://jwst-crds.stsci.edu
+    jwst,downstreamdeps: CRDS_SERVER_URL=https://jwst-crds.stsci.edu
+    jwst: CRDS_SERVER_URL = https://jwst-crds.stsci.edu
+    jwst,romancal: CRDS_PATH = {package_root}/crds_cache
+    jwst,romancal: CRDS_CLIENT_RETRY_COUNT = 3
+    jwst,romancal: CRDS_CLIENT_RETRY_DELAY_SECONDS = 20
     romancal: CRDS_SERVER_URL=https://roman-crds.stsci.edu
 package =
     !cov: wheel
@@ -72,15 +79,21 @@ commands_pre =
 # will allow numpy 2.0 to be installed (and won't work with numpy 2.0). So we pin it.
     oldestdeps: pip install numpy<2.0
     oldestdeps: pip install -r requirements-min.txt
+    jwst,romancal: bash -c "pip freeze -q | grep 'stcal @' > {env_tmp_dir}/requirements.txt"
+    jwst: git clone https://github.com/spacetelescope/jwst.git
+    romancal: git clone https://github.com/spacetelescope/romancal.git
+    jwst: pip install -e jwst[test]
+    romancal: pip install -e romancal[test]
+    jwst,romancal: pip install -r {env_tmp_dir}/requirements.txt
     pip freeze
 commands =
     pytest \
     warnings: -W error \
     nolegacypath: -p no:legacypath \
     xdist: -n auto \
-    jwst: --pyargs jwst --ignore-glob=timeconversion --ignore-glob=associations --ignore-glob=*/scripts/* \
-    romancal: --pyargs romancal \
-    cov: --cov=src/stpipe --cov-config=pyproject.toml --cov-report=term-missing --cov-report=xml \
+    jwst: jwst \
+    romancal: romancal \
+    cov: --cov={package_root} --cov-config={package_root}/pyproject.toml --cov-report=term-missing --cov-report=xml \
     {posargs}
 
 [testenv:build-docs]