diff --git a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_grid.py b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_grid.py
index 777044199df5ef2d5a047a39ef0743ff1db59641..4e806448361a610ff5c2fec6b12b939bd094030b 100755
--- a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_grid.py
+++ b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_grid.py
@@ -4,6 +4,7 @@
 # art-description: Trigger RDO->RDO_TRIG athena test of the Dev_pp_run3_v1 menu
 # art-type: grid
 # art-include: master/Athena
+# art-athena-mt: 4
 # art-output: *.txt
 # art-output: *.log
 # art-output: log.*
@@ -24,7 +25,8 @@ ex = ExecStep.ExecStep()
 ex.type = 'athena'
 ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
 ex.input = 'ttbar'
-ex.threads = 1
+ex.threads = 4
+ex.concurrent_events = 4
 # LS2_v1 soon to be renamed to Dev_pp_run3_v1
 ex.args = '-c "setMenu=\'LS2_v1_TriggerValidation_mc_prescale\';doWriteBS=False;doWriteRDOTrigger=True;"'
 
diff --git a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_pu80_grid.py b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_pu80_grid.py
index 59cae14f1c5fb857e1e3d6c97c3e6028b9c57d6d..b44906f430bf9a6542815ed84b1f8958efc47eb2 100755
--- a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_pu80_grid.py
+++ b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_pu80_grid.py
@@ -4,6 +4,7 @@
 # art-description: Trigger RDO->RDO_TRIG athena test of the Dev_pp_run3_v1 menu with pileup80 ttbar sample
 # art-type: grid
 # art-include: master/Athena
+# art-athena-mt: 4
 # art-output: *.txt
 # art-output: *.log
 # art-output: log.*
@@ -24,7 +25,8 @@ ex = ExecStep.ExecStep()
 ex.type = 'athena'
 ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
 ex.input = 'ttbar_pu80'
-ex.threads = 1
+ex.threads = 4
+ex.concurrent_events = 4
 # LS2_v1 soon to be renamed to Dev_pp_run3_v1
 ex.args = '-c "setMenu=\'LS2_v1_TriggerValidation_mc_prescale\';doWriteBS=False;doWriteRDOTrigger=True;"'
 
diff --git a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_writeBS_grid.py b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_writeBS_grid.py
index dbea883df517d7009893fe7ae475cade00e7025d..d25b9b9371ef627b4815e650ae2e8a781631f3b2 100755
--- a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_writeBS_grid.py
+++ b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Dev_writeBS_grid.py
@@ -4,6 +4,7 @@
 # art-description: Trigger RDO->BS athena test of the Dev_pp_run3_v1 menu
 # art-type: grid
 # art-include: master/Athena
+# art-athena-mt: 4
 # art-output: *.txt
 # art-output: *.log
 # art-output: log.*
@@ -25,7 +26,8 @@ ex = ExecStep.ExecStep()
 ex.type = 'athena'
 ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
 ex.input = 'ttbar'
-ex.threads = 1
+ex.threads = 4
+ex.concurrent_events = 4
 # LS2_v1 soon to be renamed to Dev_pp_run3_v1
 ex.args = '-c "setMenu=\'LS2_v1_TriggerValidation_mc_prescale\';doWriteBS=True;doWriteRDOTrigger=False;"'
 
diff --git a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1MC_grid.py b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1MC_grid.py
index 07af8bc468f483cee70105a1f33553f41be3ae03..bbd854cd380249b12b9186ad01d47904c98b66bd 100755
--- a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1MC_grid.py
+++ b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1MC_grid.py
@@ -4,6 +4,7 @@
 # art-description: Trigger RDO->RDO_TRIG athena test of the MC_pp_run3_v1 menu
 # art-type: grid
 # art-include: master/Athena
+# art-athena-mt: 4
 # art-output: *.txt
 # art-output: *.log
 # art-output: log.*
@@ -24,7 +25,8 @@ ex = ExecStep.ExecStep()
 ex.type = 'athena'
 ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
 ex.input = 'ttbar'
-ex.threads = 1
+ex.threads = 4
+ex.concurrent_events = 4
 ex.args = '-c "setMenu=\'MC_pp_run3_v1\';doWriteBS=False;doWriteRDOTrigger=True;"'
 
 test = Test.Test()
diff --git a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1PhysP1_grid.py b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1PhysP1_grid.py
index a950aa8984a180b93a700136d08bd3333f8db3e1..50c63fa1915875a8e3c0e9b5ffb48fe97adaa419 100755
--- a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1PhysP1_grid.py
+++ b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1PhysP1_grid.py
@@ -4,6 +4,7 @@
 # art-description: Trigger RDO->RDO_TRIG athena test of the PhysicsP1_pp_run3_v1 menu
 # art-type: grid
 # art-include: master/Athena
+# art-athena-mt: 4
 # art-output: *.txt
 # art-output: *.log
 # art-output: log.*
@@ -24,7 +25,8 @@ ex = ExecStep.ExecStep()
 ex.type = 'athena'
 ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
 ex.input = 'ttbar'
-ex.threads = 1
+ex.threads = 4
+ex.concurrent_events = 4
 ex.args = '-c "setMenu=\'PhysicsP1_pp_run3_v1\';doWriteBS=False;doWriteRDOTrigger=True;"'
 
 test = Test.Test()
diff --git a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Phys_grid.py b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Phys_grid.py
index 732a19a4b137723cf5aad1ba54f0dc3e950a34b2..3be147f9fa51f4ee6ebfc6e5939f65e77b8640ba 100755
--- a/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Phys_grid.py
+++ b/Trigger/TrigValidation/TriggerTest/test/test_trig_mc_v1Phys_grid.py
@@ -4,6 +4,7 @@
 # art-description: Trigger RDO->RDO_TRIG athena test of the Physics_pp_run3_v1 menu
 # art-type: grid
 # art-include: master/Athena
+# art-athena-mt: 4
 # art-output: *.txt
 # art-output: *.log
 # art-output: log.*
@@ -24,7 +25,8 @@ ex = ExecStep.ExecStep()
 ex.type = 'athena'
 ex.job_options = 'TriggerJobOpts/runHLT_standalone.py'
 ex.input = 'ttbar'
-ex.threads = 1
+ex.threads = 4
+ex.concurrent_events = 4
 ex.args = '-c "setMenu=\'Physics_pp_run3_v1\';doWriteBS=False;doWriteRDOTrigger=True;"'
 
 test = Test.Test()