diff --git a/tests/etopo1_oper_an_fc_O1280.yml b/tests/etopo1_oper_an_fc_O1280.yml
new file mode 100644
index 000000000..f20a3df38
--- /dev/null
+++ b/tests/etopo1_oper_an_fc_O1280.yml
@@ -0,0 +1,53 @@
+grid:        O1280
+directions:  36
+frequencies: 29
+bathymetry:  ETOPO1
+
+advection:
+    timestep: 450
+physics:
+    timestep: 450
+
+analysis.begin: 2022-12-31 12:00:00
+analysis.end:   2023-01-01 00:00:00
+forecast.begin: 2023-01-01 00:00:00
+forecast.end:   2023-01-01 06:00:00
+
+begin: ${analysis.begin}
+end:   ${forecast.end}
+
+nproma: 128
+
+forcings:
+    file:  data/forcings/oper_an_12h_fc_2023010100_36h_O1280.grib
+
+    at:
+      - begin:     ${analysis.begin}
+        end:       ${analysis.end}
+        timestep:  06:00
+      - begin:     ${forecast.begin}
+        end:       ${forecast.end}
+        timestep:  01:00
+
+output:
+    fields:
+        name:
+          - swh         # Significant height of combined wind waves and swell
+          - mwd         # Mean wave direction
+          - mwp         # Mean wave period
+          - pp1d        # Peak wave period
+          - dwi         # 10 metre wind direction
+          - cdww        # Coefficient of drag with waves
+          - wind        # 10 metre wind speed
+        format: grib    # (default : grib) or binary
+        at:
+          - timestep: 01:00
+
+    restart:
+        format: binary # (default : binary) or grib
+        at:
+          - time: ${end}
+
+
+validation:
+
diff --git a/tests/etopo1_oper_an_fc_O640.yml b/tests/etopo1_oper_an_fc_O640.yml
new file mode 100644
index 000000000..334f03400
--- /dev/null
+++ b/tests/etopo1_oper_an_fc_O640.yml
@@ -0,0 +1,53 @@
+grid:        O640
+directions:  36
+frequencies: 29
+bathymetry:  ETOPO1
+
+advection:
+    timestep: 450
+physics:
+    timestep: 450
+
+analysis.begin: 2022-12-31 12:00:00
+analysis.end:   2023-01-01 00:00:00
+forecast.begin: 2023-01-01 00:00:00
+forecast.end:   2023-01-01 06:00:00
+
+begin: ${analysis.begin}
+end:   ${forecast.end}
+
+nproma: 128
+
+forcings:
+    file:  data/forcings/oper_an_12h_fc_2023010100_36h_O640.grib
+
+    at:
+      - begin:     ${analysis.begin}
+        end:       ${analysis.end}
+        timestep:  06:00
+      - begin:     ${forecast.begin}
+        end:       ${forecast.end}
+        timestep:  01:00
+
+output:
+    fields:
+        name:
+          - swh         # Significant height of combined wind waves and swell
+          - mwd         # Mean wave direction
+          - mwp         # Mean wave period
+          - pp1d        # Peak wave period
+          - dwi         # 10 metre wind direction
+          - cdww        # Coefficient of drag with waves
+          - wind        # 10 metre wind speed
+        format: grib    # (default : grib) or binary
+        at:
+          - timestep: 01:00
+
+    restart:
+        format: binary # (default : binary) or grib
+        at:
+          - time: ${end}
+
+
+validation:
+