diff --git a/test/mms/Makefile b/test/mms/Makefile
index 57fff7e..d42f333 100644
--- a/test/mms/Makefile
+++ b/test/mms/Makefile
@@ -1,4 +1,4 @@
-all: parallel laplace delp
+all: parallel
 
 radial: do_radial
 
diff --git a/test/mms/delp_grid.py b/test/mms/delp_grid.py
index fe588ff..072492f 100644
--- a/test/mms/delp_grid.py
+++ b/test/mms/delp_grid.py
@@ -1,3 +1,5 @@
+import warnings
+
 import zoidberg as zb
 import numpy as np
 import xarray as xr
@@ -44,6 +46,11 @@ def gen_grid(nx, ny, nz, R0, r0, r1, mode=0):
         "tmp.nc",
         metric2d=False,
     )
+    warnings.filterwarnings(
+        "ignore",
+        message="Duplicate dimension names present: dimensions {.*} appear more than once in dims=(.*). We do not yet support duplicate dimension names, but we do allow initial construction of the object. We recommend you rename the dims immediately to become distinct, as most xa",
+        category=UserWarning,
+    )
     with xr.open_dataset("tmp.nc") as ds:
         for k in "g11,g33,g_11,g_33,nx,ny,nz".split(","):
             assert np.all(ds[k] > 0)
diff --git a/test/mms/mms/BOUT.inp b/test/mms/mms/BOUT.inp
index fa6b0c5..52e57f1 100644
--- a/test/mms/mms/BOUT.inp
+++ b/test/mms/mms/BOUT.inp
@@ -1,10 +1,10 @@
 MXG=0
 MYG=1
+
 [mesh]
 MXG=0
 MYG=1
-#file = "rotating-ellipse.4x4x4.fci.fix.nc"
-file = "poloidal_const_4_2_4_1.fci.nc"
+file = "parallel_const_8_16_4_1.fci.nc"
 
 extrapolate_y = false
 extrapolate_x = false
diff --git a/test/mms/parallel_grid.py b/test/mms/parallel_grid.py
index e3785e3..bb49b4a 100644
--- a/test/mms/parallel_grid.py
+++ b/test/mms/parallel_grid.py
@@ -1,3 +1,5 @@
+import warnings
+
 import zoidberg as zb
 import numpy as np
 import xarray as xr
@@ -47,12 +49,19 @@ def gen_grid(nx, ny, nz, R0, r0, r1, mode=0):
         "tmp.nc",
         metric2d=False,
     )
+    warnings.filterwarnings(
+        "ignore",
+        message="Duplicate dimension names present: dimensions {.*} appear more than once in dims=(.*). We do not yet support duplicate dimension names, but we do allow initial construction of the object. We recommend you rename the dims immediately to become distinct, as most xa",
+        category=UserWarning,
+    )
     with xr.open_dataset("tmp.nc") as ds:
         dims = ds.dz.dims
         ds["r_minor"] = dims, one * r[:, None, :]
         ds["phi"] = "y", phi
         ds["theta"] = dims, one * theta[:, None, :]
         ds["one"] = dims, one
+        for pre in "for", "back":
+            ds[f"{pre}ward_xt_prime"] = dims, one * np.arange(nx)[:, None, None]
         ds.to_netcdf(fn)
 
 
diff --git a/test/mms/poloidal_grid.py b/test/mms/poloidal_grid.py
index 0e4fbe7..7236a0e 100644
--- a/test/mms/poloidal_grid.py
+++ b/test/mms/poloidal_grid.py
@@ -1,3 +1,5 @@
+import warnings
+
 import zoidberg as zb
 import numpy as np
 import xarray as xr
@@ -53,7 +55,7 @@ def gen_grid(*args):
     pol_grid = zb.poloidal_grid.StructuredPoloidalGrid(R, Z)
 
     field = zb.field.CurvedSlab(Bz=0, Bzprime=0, Rmaj=R0)
-    grid = zb.grid.Grid(pol_grid, phi, 5, yperiodic=True)
+    grid = zb.grid.Grid(pol_grid, phi, np.pi / 2.5, yperiodic=True)
 
     fn = gen_name(*args)
 
@@ -65,6 +67,11 @@ def gen_grid(*args):
         "tmp.nc",
         metric2d=False,
     )
+    warnings.filterwarnings(
+        "ignore",
+        message="Duplicate dimension names present: dimensions {.*} appear more than once in dims=(.*). We do not yet support duplicate dimension names, but we do allow initial construction of the object. We recommend you rename the dims immediately to become distinct, as most xa",
+        category=UserWarning,
+    )
     with xr.open_dataset("tmp.nc") as ds:
         dims = ds.dz.dims
         ds["r_minor"] = dims, one * r[:, None, :]
@@ -84,7 +91,7 @@ def _togen(*args):
 
 grids = {}
 for mode in range(5):
-    grids[modes[mode][0]] = [_togen(4, 2, nz, 1, 0.1, 0.5, mode) + (nz,) for nz in lst]
+    grids[modes[mode][0]] = [_togen(6, 2, nz, 1, 0.1, 0.5, mode) + (nz,) for nz in lst]
 
 if __name__ == "__main__":
     for todos in grids.values():
diff --git a/test/mms/radial_grid.py b/test/mms/radial_grid.py
index 593dfa6..497e224 100644
--- a/test/mms/radial_grid.py
+++ b/test/mms/radial_grid.py
@@ -1,3 +1,5 @@
+import warnings
+
 import zoidberg as zb
 import numpy as np
 import xarray as xr
@@ -38,6 +40,11 @@ def gen_grid(nx, ny, nz, R0, r0, r1, mode=0):
         "tmp.nc",
         metric2d=False,
     )
+    warnings.filterwarnings(
+        "ignore",
+        message="Duplicate dimension names present: dimensions {.*} appear more than once in dims=(.*). We do not yet support duplicate dimension names, but we do allow initial construction of the object. We recommend you rename the dims immediately to become distinct, as most xa",
+        category=UserWarning,
+    )
     with xr.open_dataset("tmp.nc") as ds:
         dims = ds.dz.dims
         ds["r_minor"] = dims, one * r[:, None, :]