diff --git a/examples/neuronet_test/dump.out.REFERENCE b/examples/neuronet_test/dump.out.REFERENCE
new file mode 100644
index 000000000..4c306285e
--- /dev/null
+++ b/examples/neuronet_test/dump.out.REFERENCE
@@ -0,0 +1,24 @@
+ITEM: TIMESTEP
+0
+ITEM: NUMBER OF ATOMS
+3
+ITEM: BOX BOUNDS pp pp pp
+0.0000000000000000e+00 1.2000000000000000e+01
+0.0000000000000000e+00 1.2000000000000000e+01
+0.0000000000000000e+00 1.2000000000000000e+01
+ITEM: ATOMS id xs ys zs fx fy fz 
+1 0 0 0 -0.169302 0.038219 -0.207521 
+2 0.25 0.25 0 -0.038219 -0.253563 0.215344 
+3 0.25 0 0.25 0.207521 0.215344 -0.00782258 
+ITEM: TIMESTEP
+1
+ITEM: NUMBER OF ATOMS
+3
+ITEM: BOX BOUNDS pp pp pp
+0.0000000000000000e+00 1.2000000000000000e+01
+0.0000000000000000e+00 1.2000000000000000e+01
+0.0000000000000000e+00 1.2000000000000000e+01
+ITEM: ATOMS id xs ys zs fx fy fz 
+1 -6.80632e-05 1.53649e-05 -8.34281e-05 -0.167912 0.0380914 -0.206003 
+2 0.249985 0.249898 8.6573e-05 -0.0380902 -0.255163 0.217073 
+3 0.250083 8.6573e-05 0.249997 0.206002 0.217072 -0.0110701