diff --git a/doc/source/reference/idefix.ini.rst b/doc/source/reference/idefix.ini.rst
index 066db997..a7309f10 100644
--- a/doc/source/reference/idefix.ini.rst
+++ b/doc/source/reference/idefix.ini.rst
@@ -16,7 +16,7 @@ allows for comments, which should start with ``#``.
 
 ``Grid`` section
 --------------------
-The grid section defines the grid total dimension. It consists of 3 entries ``X1-grid``, ``X2-grid`` and ``X3-grid``. Each entry defines the repartition of the grid points in the corresponding direction (the grid is always rectilinear).
+The grid section defines the grid total dimension. It consists of 3 entries ``X1-grid``, ``X2-grid`` (when DIMENSIONS>=2) and ``X3-grid`` (when DIMENSIONS=3). Each entry defines the repartition of the grid points in the corresponding direction (the grid is always rectilinear).
 Each entry defines a series of grid blocks which are concatenated along the direction. Each block in a direction can have a different spacing rule (uniform, log or stretched). The definition of the Grid entries is as follows
 
 +----------------------------+-------------------------+------------------------------+
@@ -332,8 +332,8 @@ this block is simply ignored.
 ------------------------
 
 This section describes the boundary conditions used by the code. There are 6 entries
-which need to be defined: ``X1-beg``, ``X2-beg``, ``X3-beg`` for the left boundaries in the direction X1, X2, X3,
-and ``X1-end``, ``X2-end``, ``X3-end`` for the right boundaries. Each boundary can be assigned the following types of conditions
+that need to be defined: ``X1-beg``, ``X2-beg``, ``X3-beg`` for the left boundaries in the direction X1, X2, X3,
+and ``X1-end``, ``X2-end``, ``X3-end`` for the right boundaries. ``X2`` boundaries are mandatory only when DIMENSIONS>=2 and ``X3`` when DIMENSIONS=3. Each boundary can be assigned the following types of conditions
 
 +----------------+------------------------------------------------------------------------------------------------------------------+
 | Boundary type  | Comment                                                                                                          |
diff --git a/src/dataBlock/planetarySystem/planetarySystem.cpp b/src/dataBlock/planetarySystem/planetarySystem.cpp
index 3d18e69d..8d01118d 100644
--- a/src/dataBlock/planetarySystem/planetarySystem.cpp
+++ b/src/dataBlock/planetarySystem/planetarySystem.cpp
@@ -83,12 +83,16 @@ indirect term, with multiple planets that don't feel each others.");
     IDEFIX_ERROR("need to define a planet-to-primary mass ratio via planetToPrimary");
   }
 #if GEOMETRY == POLAR || GEOMETRY == CARTESIAN
-  if ((this->data->mygrid->xbeg[KDIR] == 0)
-      || (this->data->mygrid->xend[KDIR] == 0)) {
-    this->halfdisk = true;
-  } else {
+  #if DIMENSIONS == 3
+    if ((this->data->mygrid->xbeg[KDIR] == 0)
+        || (this->data->mygrid->xend[KDIR] == 0)) {
+      this->halfdisk = true;
+    } else {
+      this->halfdisk = false;
+    }
+  #else // DIMENSIONS == 3
     this->halfdisk = false;
-  }
+  #endif // DIMENSIONS == 3
 #elif GEOMETRY == SPHERICAL
   if ( (this->data->mygrid->xbeg[JDIR] == M_PI/2.0)
         || (this->data->mygrid->xend[JDIR] == M_PI/2.0)) {
diff --git a/src/gravity/laplacian.hpp b/src/gravity/laplacian.hpp
index 4c41842b..28572439 100644
--- a/src/gravity/laplacian.hpp
+++ b/src/gravity/laplacian.hpp
@@ -19,7 +19,14 @@ class DataBlock;
 class Laplacian {
  public:
   // Types of boundary which can be treated
-  enum LaplacianBoundaryType {internalgrav, periodic, nullgrad, nullpot, userdef, axis, origin};
+  enum LaplacianBoundaryType {internalgrav,
+                              periodic,
+                              nullgrad,
+                              nullpot,
+                              userdef,
+                              axis,
+                              origin,
+                              undefined};
 
   Laplacian() = default;
   Laplacian(DataBlock *, std::array<LaplacianBoundaryType,3>,
diff --git a/src/gravity/selfGravity.cpp b/src/gravity/selfGravity.cpp
index 8efef800..43f76471 100644
--- a/src/gravity/selfGravity.cpp
+++ b/src/gravity/selfGravity.cpp
@@ -42,7 +42,11 @@ void SelfGravity::Init(Input &input, DataBlock *datain) {
   }
 
   // Get the gravity-related boundary conditions
-  for(int dir = 0 ; dir < 3 ; dir++) {
+  for (int dir = 0 ; dir < 3 ; dir++) {
+    this->lbound[dir] = Laplacian::LaplacianBoundaryType::undefined;
+    this->rbound[dir] = Laplacian::LaplacianBoundaryType::undefined;
+  }
+  for(int dir = 0 ; dir < DIMENSIONS ; dir++) {
     std::string label = std::string("boundary-X")+std::to_string(dir+1)+std::string("-beg");
     std::string boundary = input.Get<std::string>("SelfGravity",label,0);
 
diff --git a/src/grid.cpp b/src/grid.cpp
index 14a1e174..e4c6b7b4 100644
--- a/src/grid.cpp
+++ b/src/grid.cpp
@@ -55,7 +55,7 @@ Grid::Grid(Input &input) {
     npoints[dir] = 1;
     nghost[dir] = 0;
     std::string label = std::string("X")+std::to_string(dir+1)+std::string("-grid");
-    int numPatch = input.Get<int>("Grid",label,0);
+
 
     if(dir<DIMENSIONS) {
       #if ORDER < 4
@@ -64,6 +64,7 @@ Grid::Grid(Input &input) {
         nghost[dir] = 3;
       #endif
       npoints[dir] = 0;
+      int numPatch = input.Get<int>("Grid",label,0);
       for(int patch = 0; patch < numPatch ; patch++) {
         npoints[dir] += input.Get<int>("Grid",label,2+3*patch );
       }
@@ -73,7 +74,14 @@ Grid::Grid(Input &input) {
   for(int dir = 0 ; dir < 3 ; dir++) {
     np_tot[dir] = npoints[dir] + 2*nghost[dir];
     np_int[dir] = npoints[dir];
+    lbound[dir] = undefined;
+    rbound[dir] = undefined;
+  }
+
+  // Default boundary conditions on each axis
 
+
+  for(int dir = 0 ; dir < DIMENSIONS ; dir++) {
     std::string label = std::string("X")+std::to_string(dir+1)+std::string("-beg");
     std::string boundary = input.Get<std::string>("Boundary",label,0);
 
@@ -337,6 +345,9 @@ void Grid::ShowConfig() {
         case userdef:
           lboundString="userdef";
           break;
+        case undefined:
+          lboundString="undefined";
+          break;
         default:
           lboundString="unknown";
       }
@@ -362,6 +373,8 @@ void Grid::ShowConfig() {
         case userdef:
           rboundString="userdef";
           break;
+        case undefined:
+          lboundString="undefined";
         default:
           rboundString="unknown";
       }
diff --git a/src/gridHost.cpp b/src/gridHost.cpp
index 1c48b53c..d31a232c 100644
--- a/src/gridHost.cpp
+++ b/src/gridHost.cpp
@@ -50,17 +50,17 @@ void GridHost::MakeGrid(Input &input) {
 
   // Get grid parameters from input file, block [Grid]
   for(int dir = 0 ; dir < 3 ; dir++) {
-    std::string label = std::string("X")+std::to_string(dir+1)+std::string("-grid");
-    int numPatch = input.Get<int>("Grid",label,0);
+    // These are extra dimensions that are not being used.
 
-    xstart[dir] = input.Get<real>("Grid",label,1);
-    xend[dir] = input.Get<real>("Grid",label,4+(numPatch-1)*3);
-
-    this->xbeg[dir] = xstart[dir];
-    this->xend[dir] = xend[dir];
+    if(dir<DIMENSIONS) {
+      std::string label = std::string("X")+std::to_string(dir+1)+std::string("-grid");
+      int numPatch = input.Get<int>("Grid",label,0);
 
+      xstart[dir] = input.Get<real>("Grid",label,1);
+      xend[dir] = input.Get<real>("Grid",label,4+(numPatch-1)*3);
 
-    if(dir<DIMENSIONS) {
+      this->xbeg[dir] = xstart[dir];
+      this->xend[dir] = xend[dir];
       // First, we fill cells for any non strecthed patch
       // Loop on all the patches
       int idxstart = nghost[dir];
@@ -200,10 +200,16 @@ void GridHost::MakeGrid(Input &input) {
     } else {
       // dir >= DIMENSIONS/ Init simple uniform grid
       for(int i = 0 ; i < np_tot[dir] ; i++) {
-        dx[dir](i) = (xend[dir]-xstart[dir])/(np_int[dir]);
-        x[dir](i)=xstart[dir] + (i-nghost[dir]+HALF_F)*dx[dir](i);
-        xl[dir](i)=xstart[dir] + (i-nghost[dir])*dx[dir](i);
-        xr[dir](i)=xstart[dir] + (i-nghost[dir]+1)*dx[dir](i);
+        // Initialize to default values
+        xstart[dir] = -0.5;
+        xend[dir] = 0.5;
+
+        this->xbeg[dir] = xstart[dir];
+        this->xend[dir] = xend[dir];
+        dx[dir](i) = 1.0;
+        x[dir](i)=0.0;
+        xl[dir](i)=-0.5;
+        xr[dir](i)=0.5;
       }
     }
   }
diff --git a/src/idefix.hpp b/src/idefix.hpp
index a44bf4c2..8b64c406 100644
--- a/src/idefix.hpp
+++ b/src/idefix.hpp
@@ -216,7 +216,7 @@ using IdfxFileHandler = FILE*;
 #endif
 
 // Types of boundary which can be treated
-enum BoundaryType { internal, periodic, reflective, outflow, shearingbox, axis, userdef};
+enum BoundaryType { internal, periodic, reflective, outflow, shearingbox, axis, userdef, undefined};
 enum BoundarySide { left, right};
 enum class SliceType {Cut, Average};
 
diff --git a/test/HD/FargoPlanet/setup.cpp b/test/HD/FargoPlanet/setup.cpp
index 125834a4..314858ba 100644
--- a/test/HD/FargoPlanet/setup.cpp
+++ b/test/HD/FargoPlanet/setup.cpp
@@ -43,7 +43,6 @@ void UserdefBoundary(Hydro *hydro, int dir, BoundarySide side, real t) {
   IdefixArray4D<real> Vc = hydro->Vc;
   auto *data = hydro->data;
   IdefixArray1D<real> x1 = data->x[IDIR];
-  IdefixArray1D<real> x3 = data->x[KDIR];
   if(dir==IDIR) {
     int ighost,ibeg,iend;
     if(side == left) {
@@ -56,7 +55,6 @@ void UserdefBoundary(Hydro *hydro, int dir, BoundarySide side, real t) {
         ibeg, iend,
         KOKKOS_LAMBDA (int k, int j, int i) {
           real R=x1(i);
-          real z=x3(k);
           real Vk = 1.0/sqrt(R);
 
           Vc(RHO,k,j,i) = Vc(RHO,k,j,2*ighost - i +1);
@@ -75,7 +73,6 @@ void UserdefBoundary(Hydro *hydro, int dir, BoundarySide side, real t) {
         ibeg, iend,
         KOKKOS_LAMBDA (int k, int j, int i) {
           real R=x1(i);
-          real z=x3(k);
           real Vk = 1.0/sqrt(R);
 
           Vc(RHO,k,j,i) = Vc(RHO,k,j,ighost);
diff --git a/test/HD/VSI/idefix.ini b/test/HD/VSI/idefix.ini
index bc728eac..f0ce6a4d 100644
--- a/test/HD/VSI/idefix.ini
+++ b/test/HD/VSI/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  1.0                 1024  l  3.0
 X2-grid    1  1.2707963267948965  512   u  1.8707963267948966
-X3-grid    1  0.0                 1     u  6.283185307179586
 
 [TimeIntegrator]
 CFL         0.8
@@ -22,8 +21,6 @@ X1-beg    userdef
 X1-end    outflow
 X2-beg    outflow
 X2-end    outflow
-X3-beg    periodic
-X3-end    periodic
 
 [Setup]
 epsilon    0.1
diff --git a/test/HD/ViscousDisk/idefix-rkl.ini b/test/HD/ViscousDisk/idefix-rkl.ini
index 63888492..207f3abe 100644
--- a/test/HD/ViscousDisk/idefix-rkl.ini
+++ b/test/HD/ViscousDisk/idefix-rkl.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  1.0                 64  u  3.0
 X2-grid    1  1.2707963267948965  64  u  1.8707963267948966
-X3-grid    1  0.0                 1   u  6.283185307179586
 
 [TimeIntegrator]
 CFL         0.5
@@ -23,8 +22,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    userdef
 X2-end    userdef
-X3-beg    periodic
-X3-end    periodic
 
 [Setup]
 epsilon    0.1
diff --git a/test/HD/ViscousDisk/idefix.ini b/test/HD/ViscousDisk/idefix.ini
index 673d4be7..dbe8a499 100644
--- a/test/HD/ViscousDisk/idefix.ini
+++ b/test/HD/ViscousDisk/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  1.0                 64  u  3.0
 X2-grid    1  1.2707963267948965  64  u  1.8707963267948966
-X3-grid    1  0.0                 1   u  6.283185307179586
 
 [TimeIntegrator]
 CFL         0.5
@@ -23,8 +22,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    userdef
 X2-end    userdef
-X3-beg    periodic
-X3-end    periodic
 
 [Setup]
 epsilon    0.1
diff --git a/test/HD/ViscousFlowPastCylinder/idefix-rkl.ini b/test/HD/ViscousFlowPastCylinder/idefix-rkl.ini
index 8b8b33e3..73b8722b 100644
--- a/test/HD/ViscousFlowPastCylinder/idefix-rkl.ini
+++ b/test/HD/ViscousFlowPastCylinder/idefix-rkl.ini
@@ -1,9 +1,6 @@
 [Grid]
 X1-grid    1  1.0  128  l  10.0
-# X2-grid    3    -3.141592653589793  64   s+   -0.2  128    u   0.2  64 s-  3.141592653589793
-# X2-grid    1    -3.141592653589793  256  u    3.141592653589793
 X2-grid    1  0.0  64   u  6.28318530717958
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.4
@@ -21,8 +18,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    1.0
diff --git a/test/HD/ViscousFlowPastCylinder/idefix.ini b/test/HD/ViscousFlowPastCylinder/idefix.ini
index 33793490..de1cd417 100644
--- a/test/HD/ViscousFlowPastCylinder/idefix.ini
+++ b/test/HD/ViscousFlowPastCylinder/idefix.ini
@@ -1,9 +1,6 @@
 [Grid]
 X1-grid    1  1.0  128  l  10.0
-# X2-grid    3    -3.141592653589793  64   s+   -0.2  128    u   0.2  64 s-  3.141592653589793
-# X2-grid    1    -3.141592653589793  256  u    3.141592653589793
 X2-grid    1  0.0  64   u  6.28318530717958
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.4
@@ -21,8 +18,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    1.0
diff --git a/test/HD/sod-iso/idefix-hll.ini b/test/HD/sod-iso/idefix-hll.ini
index cb6ab432..f7b36503 100644
--- a/test/HD/sod-iso/idefix-hll.ini
+++ b/test/HD/sod-iso/idefix-hll.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod-iso/idefix-hllc-rk3.ini b/test/HD/sod-iso/idefix-hllc-rk3.ini
index 7606c7fc..161237da 100644
--- a/test/HD/sod-iso/idefix-hllc-rk3.ini
+++ b/test/HD/sod-iso/idefix-hllc-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod-iso/idefix-hllc.ini b/test/HD/sod-iso/idefix-hllc.ini
index 751f5e86..a5d3eea8 100644
--- a/test/HD/sod-iso/idefix-hllc.ini
+++ b/test/HD/sod-iso/idefix-hllc.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod-iso/idefix-rk3.ini b/test/HD/sod-iso/idefix-rk3.ini
index e913683d..498a24f3 100644
--- a/test/HD/sod-iso/idefix-rk3.ini
+++ b/test/HD/sod-iso/idefix-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod-iso/idefix-tvdlf.ini b/test/HD/sod-iso/idefix-tvdlf.ini
index f6c7e57d..ecb0b07d 100644
--- a/test/HD/sod-iso/idefix-tvdlf.ini
+++ b/test/HD/sod-iso/idefix-tvdlf.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod-iso/idefix.ini b/test/HD/sod-iso/idefix.ini
index 564286e3..2477fa6d 100644
--- a/test/HD/sod-iso/idefix.ini
+++ b/test/HD/sod-iso/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod/idefix-hll.ini b/test/HD/sod/idefix-hll.ini
index 0bfb03ce..e515254d 100644
--- a/test/HD/sod/idefix-hll.ini
+++ b/test/HD/sod/idefix-hll.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.4
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod/idefix-hllc-rk3.ini b/test/HD/sod/idefix-hllc-rk3.ini
index 68a97c55..0c73d838 100644
--- a/test/HD/sod/idefix-hllc-rk3.ini
+++ b/test/HD/sod/idefix-hllc-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.4
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod/idefix-hllc.ini b/test/HD/sod/idefix-hllc.ini
index 3db50c3c..1acedec1 100644
--- a/test/HD/sod/idefix-hllc.ini
+++ b/test/HD/sod/idefix-hllc.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.4
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod/idefix-rk3.ini b/test/HD/sod/idefix-rk3.ini
index 7fe738ed..96675389 100644
--- a/test/HD/sod/idefix-rk3.ini
+++ b/test/HD/sod/idefix-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.4
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod/idefix-tvdlf.ini b/test/HD/sod/idefix-tvdlf.ini
index 36133b9b..ef465164 100644
--- a/test/HD/sod/idefix-tvdlf.ini
+++ b/test/HD/sod/idefix-tvdlf.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.4
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/HD/sod/idefix.ini b/test/HD/sod/idefix.ini
index b34a23c3..8e089ef6 100644
--- a/test/HD/sod/idefix.ini
+++ b/test/HD/sod/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  500  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.4
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    outflow
-X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.1
diff --git a/test/MHD/AmbipolarCshock/idefix-rkl.ini b/test/MHD/AmbipolarCshock/idefix-rkl.ini
index e02b3415..76a21a44 100644
--- a/test/MHD/AmbipolarCshock/idefix-rkl.ini
+++ b/test/MHD/AmbipolarCshock/idefix-rkl.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  100  u  50.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.9
@@ -17,10 +15,6 @@ csiso        constant  0.1
 [Boundary]
 X1-beg    userdef
 X1-end    userdef
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    100.0
diff --git a/test/MHD/AmbipolarWind/idefix.ini b/test/MHD/AmbipolarWind/idefix.ini
index 22d8006a..24dd839f 100644
--- a/test/MHD/AmbipolarWind/idefix.ini
+++ b/test/MHD/AmbipolarWind/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  1.0  768  l   100.0
 X2-grid    3  0.0  64   s+  1.28   96  u  1.861592653589  64  s-  3.141592653589793
-X3-grid    1  0.0  0    u   1.0
 
 [TimeIntegrator]
 CFL            0.9
@@ -25,8 +24,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    axis
 X2-end    axis
-X3-beg    periodic
-X3-end    periodic
 
 [Setup]
 epsilon                0.05
diff --git a/test/MHD/MTI/idefix-rkl.ini b/test/MHD/MTI/idefix-rkl.ini
index 2eeb7615..1b9b11eb 100644
--- a/test/MHD/MTI/idefix-rkl.ini
+++ b/test/MHD/MTI/idefix-rkl.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.  32  u  0.1
 X2-grid    1  0.  32  u  0.1
-X3-grid    1  0.  1   u  1.
 
 [TimeIntegrator]
 CFL            0.7
@@ -24,8 +23,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    userdef
 X2-end    userdef
-X3-beg    userdef
-X3-end    userdef
 
 [Setup]
 ksi         5e-4
diff --git a/test/MHD/MTI/idefix-sl.ini b/test/MHD/MTI/idefix-sl.ini
index de020034..f2c9deb2 100644
--- a/test/MHD/MTI/idefix-sl.ini
+++ b/test/MHD/MTI/idefix-sl.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.  32  u  0.1
 X2-grid    1  0.  32  u  0.1
-X3-grid    1  0.  1   u  1.
 
 [TimeIntegrator]
 CFL            0.7
@@ -24,8 +23,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    userdef
 X2-end    userdef
-X3-beg    userdef
-X3-end    userdef
 
 [Setup]
 ksi         5e-4
diff --git a/test/MHD/MTI/idefix.ini b/test/MHD/MTI/idefix.ini
index b54bedb0..7a09c406 100644
--- a/test/MHD/MTI/idefix.ini
+++ b/test/MHD/MTI/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.  32  u  0.1
 X2-grid    1  0.  32  u  0.1
-X3-grid    1  0.  1   u  1.
 
 [TimeIntegrator]
 CFL            0.7
@@ -24,8 +23,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    userdef
 X2-end    userdef
-X3-beg    userdef
-X3-end    userdef
 
 [Setup]
 ksi         5e-4
diff --git a/test/MHD/OrszagTang/idefix-hll.ini b/test/MHD/OrszagTang/idefix-hll.ini
index 3dd96a58..4f13fd97 100644
--- a/test/MHD/OrszagTang/idefix-hll.ini
+++ b/test/MHD/OrszagTang/idefix-hll.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -17,8 +16,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix-hlld-arithmetic.ini b/test/MHD/OrszagTang/idefix-hlld-arithmetic.ini
index b8549db5..8a656d7b 100644
--- a/test/MHD/OrszagTang/idefix-hlld-arithmetic.ini
+++ b/test/MHD/OrszagTang/idefix-hlld-arithmetic.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -18,8 +17,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix-hlld-hll.ini b/test/MHD/OrszagTang/idefix-hlld-hll.ini
index 8c3e4ef9..b396e991 100644
--- a/test/MHD/OrszagTang/idefix-hlld-hll.ini
+++ b/test/MHD/OrszagTang/idefix-hlld-hll.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -18,8 +17,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix-hlld-hlld.ini b/test/MHD/OrszagTang/idefix-hlld-hlld.ini
index 50e15897..5e158b93 100644
--- a/test/MHD/OrszagTang/idefix-hlld-hlld.ini
+++ b/test/MHD/OrszagTang/idefix-hlld-hlld.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -18,8 +17,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix-hlld-uct0.ini b/test/MHD/OrszagTang/idefix-hlld-uct0.ini
index fc32e81b..23646b96 100644
--- a/test/MHD/OrszagTang/idefix-hlld-uct0.ini
+++ b/test/MHD/OrszagTang/idefix-hlld-uct0.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -18,8 +17,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix-hlld.ini b/test/MHD/OrszagTang/idefix-hlld.ini
index cf0b0c09..cf6d5cbf 100644
--- a/test/MHD/OrszagTang/idefix-hlld.ini
+++ b/test/MHD/OrszagTang/idefix-hlld.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -17,8 +16,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix-tvdlf.ini b/test/MHD/OrszagTang/idefix-tvdlf.ini
index 47a05bb9..ec9ffe85 100644
--- a/test/MHD/OrszagTang/idefix-tvdlf.ini
+++ b/test/MHD/OrszagTang/idefix-tvdlf.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -17,8 +16,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/OrszagTang/idefix.ini b/test/MHD/OrszagTang/idefix.ini
index e3afb65b..0e742184 100644
--- a/test/MHD/OrszagTang/idefix.ini
+++ b/test/MHD/OrszagTang/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
 X2-grid    1  0.0  128  u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.6
@@ -17,8 +16,6 @@ X1-beg    periodic
 X1-end    periodic
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.5
diff --git a/test/MHD/ResistiveAlfvenWave/idefix-rkl.ini b/test/MHD/ResistiveAlfvenWave/idefix-rkl.ini
index 29299b06..eed2139f 100644
--- a/test/MHD/ResistiveAlfvenWave/idefix-rkl.ini
+++ b/test/MHD/ResistiveAlfvenWave/idefix-rkl.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.9
@@ -16,10 +14,6 @@ resistivity    rkl  constant  0.05
 [Boundary]
 X1-beg    periodic
 X1-end    periodic
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 # vtk       0.1
diff --git a/test/MHD/ResistiveAlfvenWave/idefix.ini b/test/MHD/ResistiveAlfvenWave/idefix.ini
index 60873036..b09cb0a6 100644
--- a/test/MHD/ResistiveAlfvenWave/idefix.ini
+++ b/test/MHD/ResistiveAlfvenWave/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  128  u  1.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.9
@@ -16,10 +14,6 @@ resistivity    explicit  constant  0.05
 [Boundary]
 X1-beg    periodic
 X1-end    periodic
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 # vtk       0.1
diff --git a/test/MHD/RotorCartesian/idefix.ini b/test/MHD/RotorCartesian/idefix.ini
index ecac9205..54d785ab 100644
--- a/test/MHD/RotorCartesian/idefix.ini
+++ b/test/MHD/RotorCartesian/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  -0.5  512  u  0.5
 X2-grid    1  -0.5  512  u  0.5
-X3-grid    1  0.0   1    u  1.0
 
 [TimeIntegrator]
 CFL            0.2
@@ -19,8 +18,6 @@ X1-beg    outflow
 X1-end    outflow
 X2-beg    outflow
 X2-end    outflow
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 vtk    0.01  -1  single_file
diff --git a/test/MHD/RotorPolar/idefix.ini b/test/MHD/RotorPolar/idefix.ini
index b893ed12..ca88369b 100644
--- a/test/MHD/RotorPolar/idefix.ini
+++ b/test/MHD/RotorPolar/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
 X1-grid    1  0.05  256   u  0.5
 X2-grid    1  0.0   1024  u  6.283185307179586
-X3-grid    1  0.0   1     u  1.0
 
 [TimeIntegrator]
 CFL            0.2
@@ -19,8 +18,6 @@ X1-beg    userdef
 X1-end    outflow
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Output]
 uservar    Vx    Vy
diff --git a/test/MHD/sod-iso/idefix-hll.ini b/test/MHD/sod-iso/idefix-hll.ini
index be20a405..52af4cfe 100644
--- a/test/MHD/sod-iso/idefix-hll.ini
+++ b/test/MHD/sod-iso/idefix-hll.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod-iso/idefix-hlld-rk3.ini b/test/MHD/sod-iso/idefix-hlld-rk3.ini
index aa0723e7..2390b88f 100644
--- a/test/MHD/sod-iso/idefix-hlld-rk3.ini
+++ b/test/MHD/sod-iso/idefix-hlld-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod-iso/idefix-hlld.ini b/test/MHD/sod-iso/idefix-hlld.ini
index f9acb7aa..1a8cfee9 100644
--- a/test/MHD/sod-iso/idefix-hlld.ini
+++ b/test/MHD/sod-iso/idefix-hlld.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod-iso/idefix-rk3.ini b/test/MHD/sod-iso/idefix-rk3.ini
index 6e6cd525..602f3492 100644
--- a/test/MHD/sod-iso/idefix-rk3.ini
+++ b/test/MHD/sod-iso/idefix-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod-iso/idefix-tvdlf.ini b/test/MHD/sod-iso/idefix-tvdlf.ini
index 32a33959..97195411 100644
--- a/test/MHD/sod-iso/idefix-tvdlf.ini
+++ b/test/MHD/sod-iso/idefix-tvdlf.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod-iso/idefix.ini b/test/MHD/sod-iso/idefix.ini
index 075eb2ae..134359d5 100644
--- a/test/MHD/sod-iso/idefix.ini
+++ b/test/MHD/sod-iso/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ csiso     constant  1.0
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod/idefix-hll.ini b/test/MHD/sod/idefix-hll.ini
index c6c5dbb1..e353fa75 100644
--- a/test/MHD/sod/idefix-hll.ini
+++ b/test/MHD/sod/idefix-hll.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL            0.8
@@ -18,10 +16,6 @@ gamma     1.66666666666667
 # not used
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod/idefix-hlld-rk3.ini b/test/MHD/sod/idefix-hlld-rk3.ini
index 68aeee11..02925c52 100644
--- a/test/MHD/sod/idefix-hlld-rk3.ini
+++ b/test/MHD/sod/idefix-hlld-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL            0.8
@@ -18,10 +16,6 @@ gamma     1.66666666666667
 # not used
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod/idefix-hlld.ini b/test/MHD/sod/idefix-hlld.ini
index cfbd486e..d8111420 100644
--- a/test/MHD/sod/idefix-hlld.ini
+++ b/test/MHD/sod/idefix-hlld.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL            0.8
@@ -18,10 +16,6 @@ gamma     1.66666666666667
 # not used
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod/idefix-rk3.ini b/test/MHD/sod/idefix-rk3.ini
index c1926956..b074218e 100644
--- a/test/MHD/sod/idefix-rk3.ini
+++ b/test/MHD/sod/idefix-rk3.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.66666666666667
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod/idefix-tvdlf.ini b/test/MHD/sod/idefix-tvdlf.ini
index 4bbc10c4..305cc2fc 100644
--- a/test/MHD/sod/idefix-tvdlf.ini
+++ b/test/MHD/sod/idefix-tvdlf.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL            0.8
@@ -18,10 +16,6 @@ gamma     1.66666666666667
 # not used
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/MHD/sod/idefix.ini b/test/MHD/sod/idefix.ini
index 67741314..39c846dc 100644
--- a/test/MHD/sod/idefix.ini
+++ b/test/MHD/sod/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  800  u  100.0
-X2-grid    1  0.0  1    u  1.0
-X3-grid    1  0.0  1    u  1.0
 
 [TimeIntegrator]
 CFL         0.8
@@ -16,10 +14,6 @@ gamma     1.66666666666667
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    10.0
diff --git a/test/Planet/Planet3Body/idefix.ini b/test/Planet/Planet3Body/idefix.ini
index a8b7bea0..4e354bf9 100644
--- a/test/Planet/Planet3Body/idefix.ini
+++ b/test/Planet/Planet3Body/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
-X1-grid    1  0.042     64  u  2.3
-X2-grid    1  0.0       32  u  6.283185307179586
-X3-grid    1  -0.00125  1   u  0.00125
+X1-grid    1  0.042  64  u  2.3
+X2-grid    1  0.0    32  u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.5
@@ -26,8 +25,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Setup]
 sigma0          0.001
diff --git a/test/Planet/PlanetMigration2D/idefix.ini b/test/Planet/PlanetMigration2D/idefix.ini
index 2be56b1a..04259b9e 100644
--- a/test/Planet/PlanetMigration2D/idefix.ini
+++ b/test/Planet/PlanetMigration2D/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
-X1-grid    1  0.42     192  u  2.14
-X2-grid    1  0.0      768  u  6.283185307179586
-X3-grid    1  -0.0125  1    u  0.0125
+X1-grid    1  0.42  192  u  2.14
+X2-grid    1  0.0   768  u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.5
@@ -29,8 +28,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Setup]
 sigma0          0.001
diff --git a/test/Planet/PlanetPlanetRK42D/idefix.ini b/test/Planet/PlanetPlanetRK42D/idefix.ini
index cbcf3c29..bf9a6bda 100644
--- a/test/Planet/PlanetPlanetRK42D/idefix.ini
+++ b/test/Planet/PlanetPlanetRK42D/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
-X1-grid    1  0.42     96   u  2.14
-X2-grid    1  0.0      384  u  6.283185307179586
-X3-grid    1  -0.0125  1    u  0.0125
+X1-grid    1  0.42  96   u  2.14
+X2-grid    1  0.0   384  u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.5
@@ -24,8 +23,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Setup]
 sigma0          0.001
diff --git a/test/Planet/PlanetSpiral2D/idefix.ini b/test/Planet/PlanetSpiral2D/idefix.ini
index 9864a223..b030e4a4 100644
--- a/test/Planet/PlanetSpiral2D/idefix.ini
+++ b/test/Planet/PlanetSpiral2D/idefix.ini
@@ -1,7 +1,6 @@
 [Grid]
-X1-grid    1  0.42     128  u  2.14
-X2-grid    1  0.0      512  u  6.283185307179586
-X3-grid    1  -0.0125  1    u  0.0125
+X1-grid    1  0.42  128  u  2.14
+X2-grid    1  0.0   512  u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.5
@@ -28,8 +27,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Setup]
 sigma0          1.0
diff --git a/test/Planet/PlanetsIsActiveRK52D/idefix-rk4.ini b/test/Planet/PlanetsIsActiveRK52D/idefix-rk4.ini
index c714362f..7fbedc65 100644
--- a/test/Planet/PlanetsIsActiveRK52D/idefix-rk4.ini
+++ b/test/Planet/PlanetsIsActiveRK52D/idefix-rk4.ini
@@ -1,7 +1,6 @@
 [Grid]
-X1-grid    1  0.42     48   u  2.14
-X2-grid    1  0.0      192  u  6.283185307179586
-X3-grid    1  -0.0125  1    u  0.0125
+X1-grid    1  0.42  48   u  2.14
+X2-grid    1  0.0   192  u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.5
@@ -24,8 +23,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Setup]
 sigma0          0.001
diff --git a/test/Planet/PlanetsIsActiveRK52D/idefix-rk5.ini b/test/Planet/PlanetsIsActiveRK52D/idefix-rk5.ini
index 8f1f8a11..44b22327 100644
--- a/test/Planet/PlanetsIsActiveRK52D/idefix-rk5.ini
+++ b/test/Planet/PlanetsIsActiveRK52D/idefix-rk5.ini
@@ -1,7 +1,6 @@
 [Grid]
-X1-grid    1  0.42     48   u  2.14
-X2-grid    1  0.0      192  u  6.283185307179586
-X3-grid    1  -0.0125  1    u  0.0125
+X1-grid    1  0.42  48   u  2.14
+X2-grid    1  0.0   192  u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.5
@@ -24,8 +23,6 @@ X1-beg    userdef
 X1-end    userdef
 X2-beg    periodic
 X2-end    periodic
-X3-beg    outflow
-X3-end    outflow
 
 [Setup]
 sigma0          0.001
diff --git a/test/SelfGravity/DustyCollapse/idefix.ini b/test/SelfGravity/DustyCollapse/idefix.ini
index 37976368..d650cc88 100644
--- a/test/SelfGravity/DustyCollapse/idefix.ini
+++ b/test/SelfGravity/DustyCollapse/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.1  4096  l  3e4
-X2-grid    1  0    64    u  3.14159265358979
-X3-grid    1  0    64    u  6.28318530717958
 
 [TimeIntegrator]
 CFL         0.2
@@ -25,18 +23,10 @@ targetError        1e-7
 maxIter            10000
 boundary-X1-beg    nullgrad
 boundary-X1-end    nullpot
-boundary-X2-beg    axis
-boundary-X2-end    axis
-boundary-X3-beg    periodic
-boundary-X3-end    periodic
 
 [Boundary]
 X1-beg    outflow
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 dmp        1
diff --git a/test/SelfGravity/JeansInstability/idefix-cg.ini b/test/SelfGravity/JeansInstability/idefix-cg.ini
index 97f1e6c9..3b40ba82 100644
--- a/test/SelfGravity/JeansInstability/idefix-cg.ini
+++ b/test/SelfGravity/JeansInstability/idefix-cg.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  1000  u  10.0
-X2-grid    1  0.0  100   u  10.0
-X3-grid    1  0.0  100   u  10.0
 
 [TimeIntegrator]
 CFL            0.8
@@ -24,18 +22,10 @@ solver             CG
 targetError        1e-6
 boundary-X1-beg    periodic
 boundary-X1-end    periodic
-boundary-X2-beg    periodic
-boundary-X2-end    periodic
-boundary-X3-beg    periodic
-boundary-X3-end    periodic
 
 [Boundary]
 X1-beg    periodic
 X1-end    periodic
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    0.1
diff --git a/test/SelfGravity/JeansInstability/idefix.ini b/test/SelfGravity/JeansInstability/idefix.ini
index 47101406..c21b52b5 100644
--- a/test/SelfGravity/JeansInstability/idefix.ini
+++ b/test/SelfGravity/JeansInstability/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  0.0  1000  u  10.0
-X2-grid    1  0.0  100   u  10.0
-X3-grid    1  0.0  100   u  10.0
 
 [TimeIntegrator]
 CFL            0.8
@@ -24,18 +22,10 @@ targetError        1e-6
 # skip               2
 boundary-X1-beg    periodic
 boundary-X1-end    periodic
-boundary-X2-beg    periodic
-boundary-X2-end    periodic
-boundary-X3-beg    periodic
-boundary-X3-end    periodic
 
 [Boundary]
 X1-beg    periodic
 X1-end    periodic
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 vtk    0.1
diff --git a/test/SelfGravity/UniformCollapse/idefix.ini b/test/SelfGravity/UniformCollapse/idefix.ini
index d5f8e4a4..e0e74a36 100644
--- a/test/SelfGravity/UniformCollapse/idefix.ini
+++ b/test/SelfGravity/UniformCollapse/idefix.ini
@@ -1,7 +1,5 @@
 [Grid]
 X1-grid    1  .01  100  l  1000.
-X2-grid    1  0.0  20   u  3.141592653589793
-X3-grid    1  0.0  20   u  6.283185307179586
 
 [TimeIntegrator]
 CFL            0.8
@@ -25,18 +23,10 @@ skip               5
 targetError        1e-6
 boundary-X1-beg    origin
 boundary-X1-end    nullpot
-boundary-X2-beg    periodic
-boundary-X2-end    periodic
-boundary-X3-beg    periodic
-boundary-X3-end    periodic
 
 [Boundary]
 X1-beg    userdef
 X1-end    outflow
-X2-beg    periodic
-X2-end    periodic
-X3-beg    periodic
-X3-end    periodic
 
 [Output]
 analysis    10.