diff --git a/pyphare/pyphare/pharesee/hierarchy/hierarchy_utils.py b/pyphare/pyphare/pharesee/hierarchy/hierarchy_utils.py
index 95926cd3c..487dc8605 100644
--- a/pyphare/pyphare/pharesee/hierarchy/hierarchy_utils.py
+++ b/pyphare/pyphare/pharesee/hierarchy/hierarchy_utils.py
@@ -192,15 +192,16 @@ def new_patchdatas_from(compute, patchdatas, layout, id, **kwargs):
 def new_patches_from(compute, hierarchies, ilvl, t, **kwargs):
     reference_hier = hierarchies[0]
     new_patches = []
-    patch_nbr = len(reference_hier.level(ilvl, time=t).patches)
-    for ip in range(patch_nbr):
-        current_patch = reference_hier.level(ilvl, time=t).patches[ip]
+    ref_patches = reference_hier.level(ilvl, time=t).patches
+    for ip, current_patch in enumerate(ref_patches):
         layout = current_patch.layout
         patch_datas = extract_patchdatas(hierarchies, ilvl, t, ip)
         new_patch_datas = new_patchdatas_from(
             compute, patch_datas, layout, id=current_patch.id, **kwargs
         )
-        new_patches.append(Patch(new_patch_datas, current_patch.id))
+        new_patches.append(
+            Patch(new_patch_datas, current_patch.id, attrs=current_patch.attrs)
+        )
     return new_patches
 
 
diff --git a/tests/simulator/test_run.py b/tests/simulator/test_run.py
index f8a4e687e..f935e9768 100644
--- a/tests/simulator/test_run.py
+++ b/tests/simulator/test_run.py
@@ -1,26 +1,22 @@
 #!/usr/bin/env python3
 
+import numpy as np
 from pathlib import Path
+import matplotlib as mpl
 
 import pyphare.pharein as ph
+from pyphare.cpp import cpp_lib
 from pyphare.simulator.simulator import Simulator, startMPI
 from pyphare.pharesee.run import Run
-
-import numpy as np
-
-import matplotlib as mpl
-
-mpl.use("Agg")
-
-from pyphare.cpp import cpp_lib
 from tests.simulator import SimulatorTest
 
+mpl.use("Agg")
 
 cpp = cpp_lib()
 startMPI()
 
 time_step = 0.005
-final_time = 0.1
+final_time = 0.05
 time_step_nbr = int(final_time / time_step)
 timestamps = np.arange(0, final_time + 0.01, 0.05)
 diag_dir = "phare_outputs/test_run"
@@ -224,15 +220,25 @@ def test_run(self):
         sim = config()
         self.register_diag_dir_for_cleanup(diag_dir)
         Simulator(sim).run().reset()
+
+        run = Run(diag_dir)
+        B = run.GetB(timestamps[-1], all_primal=False)
+        self.assertTrue(B.levels()[0].patches[0].attrs)
+
+        B = run.GetB(timestamps[-1])
+        self.assertTrue(B.levels()[0].patches[0].attrs)
+
         if cpp.mpi_rank() == 0:
             plot(diag_dir)
 
             for time in timestamps:
                 for q in ["divb", "Ranks", "N", "jz"]:
                     assert_file_exists_with_size_at_least(plot_file_for_qty(q, time))
-    
+
                 for c in ["x", "y", "z"]:
-                    assert_file_exists_with_size_at_least(plot_file_for_qty(f"b{c}", time))
+                    assert_file_exists_with_size_at_least(
+                        plot_file_for_qty(f"b{c}", time)
+                    )
 
         cpp.mpi_barrier()