diff --git a/.travis.yml b/.travis.yml
index 28d8e125..f13a2fc5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -109,7 +109,7 @@ install:
     # hdf5
     - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then sudo $apt_get_install  -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" libpango-1.0-0 libpangocairo-1.0-0 libhdf5-dev; fi
     - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then sudo $apt_get_install hdf5-tools; fi
-    - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then brew install hdf5 --with-cxx; fi
+    - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then brew install hdf5; fi
 
     # gnuplot-iostream
     - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then sudo $apt_get_install gnuplot-nox; fi
diff --git a/tests/sandbox/convergence_adv_diffusion/convergence_adv_diffusion.cpp b/tests/sandbox/convergence_adv_diffusion/convergence_adv_diffusion.cpp
index 881302bf..59d52d07 100644
--- a/tests/sandbox/convergence_adv_diffusion/convergence_adv_diffusion.cpp
+++ b/tests/sandbox/convergence_adv_diffusion/convergence_adv_diffusion.cpp
@@ -41,6 +41,7 @@ err_t test(int np)
     time = 1.0,
     dx = 2.0 * pi / (np - 1),  
     dt = 0.4 * dx,
+    advective_vel = 1.0,
     mu = 0.001;
 
   int nt = time / dt;
@@ -54,6 +55,7 @@ err_t test(int np)
   p.di = dx;
   p.dt = dt;
   p.mu = mu;
+  p.advective_vel = advective_vel;
 
   concurr::serial<
     slv_t, 
@@ -62,11 +64,11 @@ err_t test(int np)
 
   blitz::firstIndex i;
 
-  run.advectee(0) = exact_f{0., mu}(i * dx);
+  run.advectee(0) = exact_f{0., mu, advective_vel}(i * dx);
   run.advectee(1) = 0;
 
   decltype(run.advectee()) true_solution(run.advectee().shape());
-  true_solution = exact_f{time, mu}(i * dx);
+  true_solution = exact_f{time, mu, advective_vel}(i * dx);
 
   run.advance(nt);
 
diff --git a/tests/sandbox/convergence_adv_diffusion/solver.hpp b/tests/sandbox/convergence_adv_diffusion/solver.hpp
index d8e460fd..eee2f8b5 100644
--- a/tests/sandbox/convergence_adv_diffusion/solver.hpp
+++ b/tests/sandbox/convergence_adv_diffusion/solver.hpp
@@ -18,11 +18,11 @@ using real_t = double;
 
 struct exact_f
 {
-  real_t t, mu;
+  real_t t, mu, advective_vel;
 
   real_t operator()(const real_t x) const
   {
-    return 2 + std::sin(x - t) * std::exp(-mu * t);
+    return 2 + std::sin(x - advective_vel * t) * std::exp(-mu * t);
 
   }
   BZ_DECLARE_FUNCTOR(exact_f);
@@ -71,7 +71,7 @@ class adv_diffusion_solver : public libmpdataxx::solvers::mpdata_rhs_vip<ct_para
 
   protected:
   
-  real_t mu;
+  real_t mu, advective_vel;
 
   void hook_ante_loop(const typename parent_t::advance_arg_t nt)
   {
@@ -91,7 +91,7 @@ class adv_diffusion_solver : public libmpdataxx::solvers::mpdata_rhs_vip<ct_para
       tmp(ii) = exact_f{-this->dt, mu}(ii * this->di);
     }
     this->xchng_sclr(tmp);
-    this->vip_stash(-1)[0](i) = 1 + diffusive_vel<diffusive_vel_ord>(tmp, i, this->di, mu);
+    this->vip_stash(-1)[0](i) = advective_vel + diffusive_vel<diffusive_vel_ord>(tmp, i, this->di, mu);
 
     if (parent_t::div3_mpdata)
     {
@@ -101,7 +101,7 @@ class adv_diffusion_solver : public libmpdataxx::solvers::mpdata_rhs_vip<ct_para
         tmp(ii) = exact_f{-2 * this->dt, mu}(ii * this->di);
       }
       this->xchng_sclr(tmp);
-      this->vip_stash(-2)[0](i) = 1 + diffusive_vel<diffusive_vel_ord>(tmp, i, this->di, mu);
+      this->vip_stash(-2)[0](i) = advective_vel + diffusive_vel<diffusive_vel_ord>(tmp, i, this->di, mu);
     }
   }
   
@@ -111,7 +111,7 @@ class adv_diffusion_solver : public libmpdataxx::solvers::mpdata_rhs_vip<ct_para
     const auto &i = this->i;
 
     this->xchng_sclr(psi);
-    this->vips()[0](i) = 1 + diffusive_vel<diffusive_vel_ord>(psi, i, this->di, mu);
+    this->vips()[0](i) = advective_vel + diffusive_vel<diffusive_vel_ord>(psi, i, this->di, mu);
 
     return parent_t::calc_gc();
   }
@@ -120,7 +120,7 @@ class adv_diffusion_solver : public libmpdataxx::solvers::mpdata_rhs_vip<ct_para
 
   struct rt_params_t : parent_t::rt_params_t 
   { 
-    real_t mu;
+    real_t mu, advective_vel;
   };
 
   adv_diffusion_solver(
@@ -128,6 +128,7 @@ class adv_diffusion_solver : public libmpdataxx::solvers::mpdata_rhs_vip<ct_para
     const rt_params_t &p
   ) :
   parent_t(args, p),
-  mu(p.mu)
+  mu(p.mu),
+  advective_vel(p.advective_vel)
   {}
 };