diff --git a/Tools/Tier0ChainTests/test/test_q431.sh b/Tools/Tier0ChainTests/test/test_q431.sh
index 67043285c0acba0a9a9abfcbd01886eebda4c2e1..47d12d3c523e56673b7b9b938351530d8ae685ee 100755
--- a/Tools/Tier0ChainTests/test/test_q431.sh
+++ b/Tools/Tier0ChainTests/test/test_q431.sh
@@ -8,7 +8,7 @@
 # art-include: 21.3/Athena
 # art-include: 21.9/Athena
 
-Reco_tf.py --AMI=q431 --outputAODFile=myAOD.pool.root --outputESDFile=myESD.pool.root --outputHISTFile=myHIST.root --imf False
+Reco_tf.py --AMI=q431 --outputAODFile=myAOD.pool.root --outputESDFile=myESD.pool.root --outputHISTFile=myHIST.root --imf False --maxEvents=1000
 echo "art-result: $? Reco"
 
 ArtPackage=$1
diff --git a/Tools/Tier0ChainTests/test/test_q431_mp.sh b/Tools/Tier0ChainTests/test/test_q431_mp.sh
index 724d6fb7c05e5a17d81c6fb625b9e5126d3ed7b2..c3682da02683f638dfe30715b740bf2ea620f30e 100755
--- a/Tools/Tier0ChainTests/test/test_q431_mp.sh
+++ b/Tools/Tier0ChainTests/test/test_q431_mp.sh
@@ -8,7 +8,7 @@
 # art-include: 21.3/Athena
 # art-include: 21.9/Athena
 
-Reco_tf.py --AMI=q431 --athenaopts='--nprocs=2' --outputAODFile=myAOD.pool.root --outputESDFile=myESD.pool.root --outputHISTFile=myHIST.root --imf False
+Reco_tf.py --AMI=q431 --athenaopts='--nprocs=2' --outputAODFile=myAOD.pool.root --outputESDFile=myESD.pool.root --outputHISTFile=myHIST.root --imf False --maxEvents=1000
 echo "art-result: $? Reco"
 
 ArtPackage=$1
diff --git a/Tools/Tier0ChainTests/test/test_q431_mt.sh b/Tools/Tier0ChainTests/test/test_q431_mt.sh
index 0c60e7dd53c3ebfc599407d92df9c66e3bf799f7..a755a1d7b1f1f7f0a78e99d775e795c1e6c564c6 100755
--- a/Tools/Tier0ChainTests/test/test_q431_mt.sh
+++ b/Tools/Tier0ChainTests/test/test_q431_mt.sh
@@ -8,7 +8,7 @@
 # art-include: 21.3/Athena
 # art-include: 21.9/Athena
 
-Reco_tf.py --AMI=q431 --athenaopts='--threads=1' --outputAODFile=myAOD.pool.root --outputESDFile=myESD.pool.root --imf False
+Reco_tf.py --AMI=q431 --athenaopts='--threads=2' --outputAODFile=myAOD.pool.root --outputESDFile=myESD.pool.root --imf False --maxEvents=1000
 echo "art-result: $? Reco"
 
 ArtPackage=$1