diff --git a/Examples/Tests/collision/inputs_3d b/Examples/Tests/collision/inputs_3d
index ed413ba2776..11d6b150dd2 100644
--- a/Examples/Tests/collision/inputs_3d
+++ b/Examples/Tests/collision/inputs_3d
@@ -22,6 +22,7 @@ boundary.field_hi = periodic periodic periodic
 warpx.serialize_initial_conditions = 1
 warpx.verbose = 1
 warpx.const_dt = 1.224744871e-07
+warpx.random_seed = 2034958209
 
 # Do not evolve the E and B fields
 algo.maxwell_solver = none
diff --git a/Regression/Checksum/benchmarks_json/collisionXYZ.json b/Regression/Checksum/benchmarks_json/collisionXYZ.json
index 984dd1d2761..7436302a99e 100644
--- a/Regression/Checksum/benchmarks_json/collisionXYZ.json
+++ b/Regression/Checksum/benchmarks_json/collisionXYZ.json
@@ -6,7 +6,7 @@
     "Ex": 0.0,
     "Ey": 0.0,
     "Ez": 0.0,
-    "T_electron": 351375.5409141184,
-    "T_ion": 349005.3985888339
+    "T_electron": 351570.64632548566,
+    "T_ion": 350085.3998917431
   }
 }