diff --git a/hysop/operator/discrete/velocity_correction.py b/hysop/operator/discrete/velocity_correction.py
index ffd41bf716d309871b8abbec5ca2843adf166fe0..c09104af5f9a0f59a617f738bada36ef3e5f3a1a 100755
--- a/hysop/operator/discrete/velocity_correction.py
+++ b/hysop/operator/discrete/velocity_correction.py
@@ -126,8 +126,7 @@ class VelocityCorrection_D(DiscreteOperator):
         self.req_flowrate.update(simulation)
 
         # warning : the flow rate value is divided by surf.
-        self.req_flowrate_val = self.req_flowrate[self.req_flowrate.name] \
-            * self._inv_ds
+        self.req_flowrate_val = self.req_flowrate.data * self._inv_ds
         # Computation of the required velocity shift
         # for the current state
         self.computeCorrection()
diff --git a/hysop/operator/tests/test_poisson.py b/hysop/operator/tests/test_poisson.py
index 3cc2fb0391abefc6d030ffd08892c5c9f792bd24..97eb83cf7cf5dfb6f21b3ba2abe123196e1697a5 100755
--- a/hysop/operator/tests/test_poisson.py
+++ b/hysop/operator/tests/test_poisson.py
@@ -12,6 +12,8 @@ import numpy as np
 import hysop.tools.numpywrappers as npw
 import math
 from hysop.domain.subsets import SubBox
+from hysop import testsenv
+
 
 pi = math.pi
 sin = np.sin
@@ -94,6 +96,7 @@ def computeRef2D(res, x, y, t):
 
     return res
 
+@testsenv.fftw_failed
 def test_Poisson_Pressure_3D():
     dom = pp.Box(length=LL)
 
@@ -125,6 +128,7 @@ def test_Poisson_Pressure_3D():
     poisson.finalize()
 
 
+@testsenv.fftw_failed
 def test_Poisson3D():
     dom = pp.Box(length=LL)
 
@@ -156,6 +160,7 @@ def test_Poisson3D():
     poisson.finalize()
 
 
+@testsenv.fftw_failed
 def test_Poisson2D():
     dom = pp.Box(length=[2. * pi, 2. * pi], origin=[0., 0.])
 
@@ -189,6 +194,7 @@ def test_Poisson2D():
     poisson.finalize()
 
 
+@testsenv.fftw_failed
 def test_Poisson3D_correction():
     dom = pp.Box(length=LL)
 
@@ -200,7 +206,7 @@ def test_Poisson3D_correction():
     # Definition of the Poisson operator
     ref_rate = npw.zeros(3)
     ref_rate[0] = uinf * LL[1] * LL[2]
-    rate = pp.VariableParameter(data=ref_rate, name='flowrate')
+    rate = pp.VariableParameter(data=ref_rate)
     poisson = Poisson(velocity, vorticity, discretization=d3D, flowrate=rate)
 
     poisson.discretize()
@@ -228,6 +234,7 @@ def test_Poisson3D_correction():
     poisson.finalize()
 
 
+@testsenv.fftw_failed
 def test_Poisson3D_projection_1():
     dom = pp.Box(length=LL)
 
@@ -262,6 +269,7 @@ def test_Poisson3D_projection_1():
     poisson.finalize()
 
 
+@testsenv.fftw_failed
 def test_Poisson3D_projection_2():
     dom = pp.Box(length=LL)
 
diff --git a/hysop/operator/tests/test_velocity_correction.py b/hysop/operator/tests/test_velocity_correction.py
index a24cbb315e604897ebcc54670eff8c87af101525..7c883152045cf49aac2e72ee5bb5563b646294a7 100755
--- a/hysop/operator/tests/test_velocity_correction.py
+++ b/hysop/operator/tests/test_velocity_correction.py
@@ -62,7 +62,7 @@ def test_velocity_correction_3D():
 
     ref_rate = npw.zeros(3)
     ref_rate[0] = uinf * box.length[1] * box.length[2]
-    rate = pp.VariableParameter(data=ref_rate, name='flowrate')
+    rate = pp.VariableParameter(data=ref_rate)
     op = VelocityCorrection(velo, vorti, req_flowrate=rate,
                             discretization=topo, io_params={})
     op.discretize()
@@ -95,7 +95,7 @@ def test_velocity_correction_2D():
 
     ref_rate = npw.zeros(2)
     ref_rate[0] = uinf * box.length[1]
-    rate = pp.VariableParameter(data=ref_rate, name='flowrate')
+    rate = pp.VariableParameter(data=ref_rate)
     op = VelocityCorrection(velo, vorti, req_flowrate=rate,
                             discretization=topo)
     op.discretize()
diff --git a/hysop/tools/profiler.py b/hysop/tools/profiler.py
index abba88b8ccbc5d2c209040392997c6dfced84690..28e1f3a5c2b99ce6d255de5318f637e855e0bca6 100644
--- a/hysop/tools/profiler.py
+++ b/hysop/tools/profiler.py
@@ -33,7 +33,7 @@ class FProfiler(object):
 
         Usage:
 
-        >>> from hysop.tools.profiler FProfiler, ftime
+        >>> from hysop.tools.profiler import FProfiler, ftime
         >>> prof = FProfiler('some_name')
         >>> start = ftime()
         >>> # do something ... [1]
@@ -41,7 +41,7 @@ class FProfiler(object):
         >>> # do something else ... [2]
         >>> prof += ftime() - start
         >>> # ...
-        >>> print prof
+        >>> # print prof
         >>> # --> display total time spent in do [1] and [2]
         >>> # and number of calls of prof