diff --git a/unit_test/test_aprox_rates/aprox_rates_util.cpp b/unit_test/test_aprox_rates/aprox_rates_util.cpp
index 65c0dfe2d..6f2aef365 100644
--- a/unit_test/test_aprox_rates/aprox_rates_util.cpp
+++ b/unit_test/test_aprox_rates/aprox_rates_util.cpp
@@ -24,7 +24,8 @@ void aprox_rates_test(const Box& bx,
 
   const int ini56 = network_spec_index("nickel-56");
 
-  AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+  amrex::ParallelFor(bx,
+  [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
   {
 
     eos_extra_t eos_state;
@@ -444,7 +445,8 @@ void aprox_rates_extra_c12ag(const Box& bx,
 
     const int ini56 = network_spec_index("nickel-56");
 
-    AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+    amrex::ParallelFor(bx,
+    [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
     {
 
         eos_extra_t eos_state;
diff --git a/unit_test/test_conductivity/conductivity_util.cpp b/unit_test/test_conductivity/conductivity_util.cpp
index ca31bd202..38163433e 100644
--- a/unit_test/test_conductivity/conductivity_util.cpp
+++ b/unit_test/test_conductivity/conductivity_util.cpp
@@ -22,7 +22,8 @@ void cond_test_C(const amrex::Box& bx,
   const int ih1 = network_spec_index("hydrogen-1");
   const int ihe4 = network_spec_index("helium-4");
 
-  AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+  amrex::ParallelFor(bx,
+  [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
   {
 
     // set the composition -- approximately solar
diff --git a/unit_test/test_eos/eos_util.cpp b/unit_test/test_eos/eos_util.cpp
index d77826444..ce20ab1d7 100644
--- a/unit_test/test_eos/eos_util.cpp
+++ b/unit_test/test_eos/eos_util.cpp
@@ -26,7 +26,8 @@ void eos_test_C(const Box& bx,
   const int ihe4 = network_spec_index("helium-4");
 
 
-  AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+  amrex::ParallelFor(bx,
+  [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
   {
 
     // set the composition -- approximately solar
diff --git a/unit_test/test_jac/main.cpp b/unit_test/test_jac/main.cpp
index 2aa372b6f..1150000fe 100644
--- a/unit_test/test_jac/main.cpp
+++ b/unit_test/test_jac/main.cpp
@@ -172,7 +172,8 @@ void main_main ()
 
         auto s = state.array(mfi);
 
-        AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+        amrex::ParallelFor(bx,
+        [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
         {
             do_jac(i, j, k, s, vars);
         });
diff --git a/unit_test/test_rhs/main.cpp b/unit_test/test_rhs/main.cpp
index e7ee5fcb2..7aba206a9 100644
--- a/unit_test/test_rhs/main.cpp
+++ b/unit_test/test_rhs/main.cpp
@@ -180,7 +180,8 @@ void main_main ()
 
         auto s = state.array(mfi);
 
-        AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+        amrex::ParallelFor(bx,
+        [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
         {
             do_rhs(i, j, k, s, vars);
         });
diff --git a/unit_test/test_sdc/main.cpp b/unit_test/test_sdc/main.cpp
index 9b75a9ab5..1aabb86f6 100644
--- a/unit_test/test_sdc/main.cpp
+++ b/unit_test/test_sdc/main.cpp
@@ -197,7 +197,8 @@ void main_main ()
         auto s = state.array(mfi);
         auto n_rhs = integrator_n_rhs.array(mfi);
 
-        AMREX_PARALLEL_FOR_3D(bx, i, j, k,
+        amrex::ParallelFor(bx,
+        [=] AMREX_GPU_HOST_DEVICE (int i, int j, int k)
         {
             bool success = do_react(vars, i, j, k, s, n_rhs);