diff --git a/parm/soca/berror/soca_parameters_diffusion_hz.yaml.j2 b/parm/soca/berror/soca_parameters_diffusion_hz.yaml.j2
index 7d3a78cfb..ddfc3d405 100644
--- a/parm/soca/berror/soca_parameters_diffusion_hz.yaml.j2
+++ b/parm/soca/berror/soca_parameters_diffusion_hz.yaml.j2
@@ -18,7 +18,7 @@ background error:
     calibration:
       normalization:
         method: randomization
-        iterations: 10000
+        iterations: 1000
 
       groups:
       - horizontal:
@@ -32,6 +32,7 @@ background error:
 
       - horizontal:
           as gaussian: true
-          fixed value: 50000.0
+          fixed value: 25000.0
+          mask: "interp_mask"
         write:
           filepath: ./staticb/hz_ice
diff --git a/parm/soca/berror/soca_parameters_diffusion_vt.yaml.j2 b/parm/soca/berror/soca_parameters_diffusion_vt.yaml.j2
index 76ab67e94..c047a0996 100644
--- a/parm/soca/berror/soca_parameters_diffusion_vt.yaml.j2
+++ b/parm/soca/berror/soca_parameters_diffusion_vt.yaml.j2
@@ -24,6 +24,7 @@ background error:
       groups:
       - vertical:
           as gaussian: true
+          levels: '{{ MOM6_LEVS }}'
           model file:
             date: '{{ MARINE_WINDOW_MIDDLE | to_isotime }}'
             basename: ./
diff --git a/test/gw-ci/CMakeLists.txt b/test/gw-ci/CMakeLists.txt
index aa9ef87b0..22e8ff632 100644
--- a/test/gw-ci/CMakeLists.txt
+++ b/test/gw-ci/CMakeLists.txt
@@ -72,13 +72,28 @@ if (RUN_GW_CI)
   set(pslot "WCDA-HYB-C48mx500")
   set(YAML_PATH ${HOMEgfs}/ci/cases/pr/C48mx500_hybAOWCDA.yaml)
   set(TASK_LIST
-    "gdasprepoceanobs"
-    "gdasmarinebmat"
-    "gdasocnanalecen"
-    "gdasmarineanlinit"
-    "gdasmarineanlvar"
-    "gdasmarineanlchkpt"
-    "gdasmarineanlfinal"
+    "gdas_prepoceanobs"
+    "gdas_marinebmat"
+    "gdas_ocnanalecen"
+    "gdas_marineanlinit"
+    "gdas_marineanlvar"
+    "gdas_marineanlchkpt"
+    "gdas_marineanlfinal"
+    )
+  add_cycling_tests(${pslot} ${YAML_PATH} ${HOMEgfs} ${RUNTESTS} ${PROJECT_SOURCE_DIR} "${TASK_LIST}")
+
+  # HYB WCDA, low-res
+  # -------------------
+  set(pslot "WCDA-HYB-C384mx025")
+  set(YAML_PATH ${HOMEgfs}/ci/cases/gfsv17/C384mx025_hybAOWCDA.yaml)
+  set(TASK_LIST
+    "gdas_prepoceanobs"
+    "gdas_marinebmat"
+    "gdas_ocnanalecen"
+    "gdas_marineanlinit"
+    "gdas_marineanlvar"
+    "gdas_marineanlchkpt"
+    "gdas_marineanlfinal"
     )
   add_cycling_tests(${pslot} ${YAML_PATH} ${HOMEgfs} ${RUNTESTS} ${PROJECT_SOURCE_DIR} "${TASK_LIST}")