Fixed test on gpu

lbmpy_tests/test_shear_flow.py

@@ -55,12 +55,12 @@ width = 40  # of box
 wall_thickness = 2
 actual_width = width - wall_thickness  # subtract boundary layer from box width
 shear_velocity = 0.2  # scale by width to keep stable
-t_max = 20000
+t_max = 2000
 
 
 @pytest.mark.parametrize('target', ('cpu', 'gpu', 'opencl'))
 @pytest.mark.parametrize('stencil_name', ("D2Q9", "D3Q19",))
-def test_poiseuille_channel(target, stencil_name):
+def test_shear_flow(target, stencil_name):
     # OpenCL and Cuda
     if target == 'opencl':
         import pytest
@@ -118,7 +118,7 @@ def test_poiseuille_channel(target, stencil_name):
     getter_eqs = cqc.output_equations_from_pdfs(src.center_vector,
                                                 {'moment2': p})
 
-    kernel_compute_p = ps.create_kernel(getter_eqs, ghost_layers=0).compile()
+    kernel_compute_p = ps.create_kernel(getter_eqs, **opts).compile()
 
     # ## Set up the simulation