diff --git a/test/testref/3dvar_lowres.test b/test/testref/3dvar_lowres.test
index b15b09f1..10b5be96 100644
--- a/test/testref/3dvar_lowres.test
+++ b/test/testref/3dvar_lowres.test
@@ -31,5 +31,5 @@ CostJo   : Nonlinear Jo(ADT) = 0.0101958572706805, nobs = 94, Jo/n = 0.000108466
 CostJo   : Nonlinear Jo(InsituTemperature) = 347.7244132153076634, nobs = 206, Jo/n = 1.6879825884238235, err = 0.8991441572394548
 CostJo   : Nonlinear Jo(InsituSalinity) = 344.0217265365836852, nobs = 218, Jo/n = 1.5780813143879986, err = 0.6081969954577753
 CostJo   : Nonlinear Jo(SeaIceFraction) = 596.7488520764163695, nobs = 89, Jo/n = 6.7050432817574874, err = 0.1000000014901161
-CostJb   : Nonlinear Jb = 0.0405075523985125
+CostJb   : Nonlinear Jb = 0.0406755001040948
 CostFunction: Nonlinear J = 18808.9914255193289137
diff --git a/test/testref/dirac_diffusion.test b/test/testref/dirac_diffusion.test
index 908841d8..405dc6b8 100644
--- a/test/testref/dirac_diffusion.test
+++ b/test/testref/dirac_diffusion.test
@@ -13,8 +13,8 @@ Covariance(SABER) * Increment:
   Valid time: 2018-04-15T00:00:00Z
   cicen   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000
   hicen   min=0.0000000000000000   max=1.0000000000000000   mean=0.0006086427267194
-   socn   min=0.0000000000000000   max=0.9719591576549972   mean=0.0156081038501815
-   tocn   min=0.0000000000000000   max=1.0526107352472542   mean=0.1203177071517117
+   socn   min=0.0000000000000000   max=0.9719591576549972   mean=0.0156098466997459
+   tocn   min=0.0000000000000000   max=1.0525891664602380   mean=0.1203299299401694
     ssh   min=0.0000000000000000   max=0.9947575154898022   mean=0.0068267320452945
    hocn   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000
     mld   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000
diff --git a/test/testref/dirac_diffusion_lowres.test b/test/testref/dirac_diffusion_lowres.test
index 8a932696..e24a04f5 100644
--- a/test/testref/dirac_diffusion_lowres.test
+++ b/test/testref/dirac_diffusion_lowres.test
@@ -13,9 +13,9 @@ Covariance(SABER) * Increment:
   Valid time: 2018-04-15T00:00:00Z
   cicen   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000
   hicen   min=0.0000000000000000   max=1.0000000000000000   mean=0.0022222222222222
-   socn   min=0.0000000000000000   max=1.0006558580168403   mean=0.0038785151142866
-   tocn   min=0.0000000000000000   max=1.0341597931839670   mean=0.0105690987121606
-    ssh   min=0.0000000000000000   max=1.1021951869160305   mean=0.0063592029400633
+   socn   min=0.0000000000000000   max=0.9998623404928122   mean=0.0039062443918490
+   tocn   min=0.0000000000000000   max=1.0344499825012332   mean=0.0106611003635403
+    ssh   min=0.0000000000000000   max=1.1025860938484717   mean=0.0063989440876744
    hocn   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000
     mld   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000
 layer_depth   min=0.0000000000000000   max=0.0000000000000000   mean=0.0000000000000000