diff --git a/src/setups/rectangular_tank.jl b/src/setups/rectangular_tank.jl
index 2b59bbc8b0..52cc5a01e5 100644
--- a/src/setups/rectangular_tank.jl
+++ b/src/setups/rectangular_tank.jl
@@ -737,6 +737,7 @@ The selected walls of the tank will be placed at the new positions.
 """
 function reset_wall!(rectangular_tank, reset_faces, positions)
     (; boundary, particle_spacing, spacing_ratio, n_layers, face_indices) = rectangular_tank
+    boundary_spacing = particle_spacing / spacing_ratio
 
     for face in eachindex(reset_faces)
         dim = div(face - 1, 2) + 1
@@ -749,17 +750,17 @@ function reset_wall!(rectangular_tank, reset_faces, positions)
                 # For "odd" faces the layer direction is outwards
                 # and for "even" faces inwards.
                 layer_shift = if iseven(face)
-                    (layer - 1) * particle_spacing / spacing_ratio
+                    (layer - 1) * boundary_spacing
                 else
-                    # Odd faces need to be shifted outwards by `particle_spacing`
+                    # Odd faces need to be shifted outwards by `boundary_spacing`
                     # to be outside of the fluid.
-                    -(layer - 1) * particle_spacing / spacing_ratio - particle_spacing
+                    -(layer - 1) * boundary_spacing - boundary_spacing
                 end
 
                 # Set position
                 boundary.coordinates[dim,
                                      particle] = positions[face] + layer_shift +
-                                                 0.5particle_spacing
+                                                 0.5boundary_spacing
             end
         end
     end
diff --git a/test/setups/rectangular_tank.jl b/test/setups/rectangular_tank.jl
index c8dc286013..1a1fc88508 100644
--- a/test/setups/rectangular_tank.jl
+++ b/test/setups/rectangular_tank.jl
@@ -89,6 +89,16 @@
 
                 @test isapprox(tank.boundary.coordinates, expected_coordinates[i])
             end
+
+            @testset "Spacing Ratio" begin
+                tank = RectangularTank(0.1, (0.2, 0.2), (0.3, 0.3), water_density,
+                                       spacing_ratio=3)
+                expected_coordinates = copy(tank.boundary.coordinates)
+
+                reset_wall!(tank, (true, true, true, true), (0.0, 0.3, 0.0, 0.3))
+
+                @test isapprox(tank.boundary.coordinates, expected_coordinates)
+            end
         end
 
         @testset "Info and Error" begin