diff --git a/.github/workflows/ellipsoid-ode45-finest-output-cic.yml b/.github/workflows/ellipsoid-ode45-finest-output-cic.yml
new file mode 100644
index 00000000..0a6270a4
--- /dev/null
+++ b/.github/workflows/ellipsoid-ode45-finest-output-cic.yml
@@ -0,0 +1,45 @@
+name: Ellipsoid ode45 finest RegularCIC with coarser output
+
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/ellipsoid-ode45-finest-output-cic.yml'
+      - 'tests/matlab/ellipsoid_ode45_finest_output.m'
+  workflow_dispatch:
+
+jobs:
+  regular_cic:
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+    steps:
+      - uses: actions/checkout@v7
+      - uses: actions/checkout@v7
+        with:
+          repository: WEC-Sim/WEC-Sim
+          ref: 0753b2e47f2457c078751dcfe5d251d1767b80ab
+          path: matlab-ref
+          filter: blob:none
+          sparse-checkout: source
+      - uses: actions/checkout@v7
+        with:
+          repository: WEC-Sim/WEC-Sim_Applications
+          ref: d53d4d4c9eda2581f04204f5d394a6ef84bb099e
+          path: applications
+          filter: blob:none
+          lfs: true
+          sparse-checkout: Nonlinear_Hydro
+      - uses: matlab-actions/setup-matlab@v3
+        with:
+          release: R2025b
+          products: Simulink Simscape Simscape_Multibody
+      - uses: matlab-actions/run-command@v3
+        with:
+          command: addpath('tests/matlab'); ellipsoid_ode45_finest_output('RegularCIC')
+      - uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: ellipsoid-ode45-finest-output-RegularCIC
+          path: |
+            matlab-ellipsoid-ode45-finest-output/RegularCIC/
+            applications/Nonlinear_Hydro/hydroData/ellipsoid.h5
+            applications/Nonlinear_Hydro/geometry/elipsoid.stl