diff --git a/.github/workflows/tests_regression.yml b/.github/workflows/tests_regression.yml
new file mode 100644
index 0000000000..b4f9061ec0
--- /dev/null
+++ b/.github/workflows/tests_regression.yml
@@ -0,0 +1,27 @@
+name: run regression tests
+
+on:
+  pull_request:
+    # types: 
+    #   - review_requested
+    branches:
+      - master
+  schedule:
+    # Nightly runs at 12am Midnight
+    - cron: "0 0 * * *"
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - run: |
+          curl --request POST https://api.github.com/repos/spacetelescope/RegressionTests/actions/workflows/jwst.yml/dispatches \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            -H "Content-Type:application/json" \
+            -H "User-Agent: SpaceTelescopeGithubBot" \
+            -H "Authorization: Bearer ${{ secrets.REGTEST_API_TOKEN }}" \
+            --data '{ "ref": "main", "inputs": { "git_repository": "${{ github.event.pull_request.head.repo }}", "git_ref": "${{ github.event.pull_request.head.ref }}", "package": "romancal"}}'
+
+
+
diff --git a/jwst/wfss_contam/tests/test_observations.py b/jwst/wfss_contam/tests/test_observations.py
index 71228f6479..82d3cdbfac 100644
--- a/jwst/wfss_contam/tests/test_observations.py
+++ b/jwst/wfss_contam/tests/test_observations.py
@@ -92,21 +92,19 @@ def test_disperse_oversample_same_result(grism_wcs, segmentation_map):
     wmin, wmax = np.min(sens_waves), np.max(sens_waves)
     sens_resp = np.ones(100)
     seg_wcs = segmentation_map.meta.wcs
-    0, (300, 500), 2, False, 
     xoffset = 2200
     yoffset = 1000
 
-
     xs, ys, areas, lams_out, counts_1, ID = dispersed_pixel(
                     x0, y0, width, height, lams, flxs, order, wmin, wmax,
                     sens_waves, sens_resp, seg_wcs, grism_wcs, ID, naxis,
                     oversample_factor=1, extrapolate_sed=False, xoffset=xoffset,
                     yoffset=yoffset)
-    
+
     xs, ys, areas, lams_out, counts_3, ID = dispersed_pixel(
                 x0, y0, width, height, lams, flxs, order, wmin, wmax,
                 sens_waves, sens_resp, seg_wcs, grism_wcs, ID, naxis,
                 oversample_factor=3, extrapolate_sed=False, xoffset=xoffset,
                 yoffset=yoffset)
 
-    assert np.isclose(np.sum(counts_1), np.sum(counts_3), rtol=1/sens_waves.size)
\ No newline at end of file
+    assert np.isclose(np.sum(counts_1), np.sum(counts_3), rtol=1/sens_waves.size)