diff --git a/hysop/operator/tests/test_velocity_correction.py b/hysop/operator/tests/test_velocity_correction.py
index 8d461caa8368b50564956200afe995a8d3eaf35e..b1aec222c2c1d4d349769836a601a35a1c1b21bd 100644
--- a/hysop/operator/tests/test_velocity_correction.py
+++ b/hysop/operator/tests/test_velocity_correction.py
@@ -15,7 +15,6 @@ from hysop.parameters.scalar_parameter import ScalarParameter, TensorParameter
 from hysop.operator.flowrate_correction import FlowRateCorrection
 from hysop.constants import Implementation
 import numpy as np
-pi  = np.pi
 
 from hysop import Field, Box
 
@@ -89,7 +88,7 @@ class TestFlowRateCorrection(object):
                                          high=size_max+1,
                                          size=dim).tolist())
 
-        domain = Box(length=(2*pi,)*dim)
+        domain = Box(length=(1,)*dim)
         velo = Field(domain=domain, name='velo', dtype=dtype,
                      nb_components=3, register_object=False)
         vorti = Field(domain=domain, name='vorti', dtype=dtype,
@@ -162,7 +161,7 @@ class TestFlowRateCorrection(object):
                 spaceStep = mesh.space_step
                 sl = [_ for _ in mesh.local_compute_slices]
                 sl[-1] = mesh.point_local_indices((0., 0., 0.))[-1]
-                flowrate = np.asarray([np.sum(_[tuple(sl)]) for _ in Fout])
+                flowrate = np.asarray([np.sum(_[tuple(sl)]) for _ in Fout[::-1]])
                 flowrate *= np.prod(spaceStep[0:2])
                 dist = npw.abs(flowrate-self.flowrate())
                 dinf = npw.max(dist)
@@ -174,7 +173,7 @@ class TestFlowRateCorrection(object):
                 print
                 print 'Test output comparisson failed for flowrate:'
                 print ' *dinf={} ({} eps)'.format(dinf, deps)
-                print ' *flowrate={} ({})'.format(flowrate, self.flowrate())
+                print ' *flowrate={} ({})'.format(flowrate, ref_flowrate)
                 print
                 msg = 'Test failed on flowrate for implementation {}.'.format(impl)
                 raise RuntimeError(msg)