diff --git a/Reconstruction/tauRec/test/test_tau_q221_serial.sh b/Reconstruction/tauRec/test/test_tau_q221_multithread.sh
similarity index 93%
rename from Reconstruction/tauRec/test/test_tau_q221_serial.sh
rename to Reconstruction/tauRec/test/test_tau_q221_multithread.sh
index 9280bfca3a1f3690c3352dbcd4c8840ea51dd27a..58db41e077b8e73531713ecf061eb18774ed160b 100755
--- a/Reconstruction/tauRec/test/test_tau_q221_serial.sh
+++ b/Reconstruction/tauRec/test/test_tau_q221_multithread.sh
@@ -14,8 +14,10 @@
 NEVENTS=500
 REF_DIR="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/tauRec/reference/q221"
 
+export ATHENA_CORE_NUMBER=4
+
 # run the reconstruction
-Reco_tf.py --maxEvents ${NEVENTS} --AMI q221
+Reco_tf.py --maxEvents ${NEVENTS} --AMI q221 --multithreaded True
 echo "art-result: $? Reconstrution"
 
 # compare the AOD file