diff --git a/dev/run-tests-jenkins b/dev/run-tests-jenkins
index c3adc696a5122..c155d4ea3f076 100755
--- a/dev/run-tests-jenkins
+++ b/dev/run-tests-jenkins
@@ -26,6 +26,7 @@ FWDIR="$( cd "$( dirname "$0" )/.." && pwd )"
 cd "$FWDIR"
 
 export PATH=/home/anaconda/envs/py36/bin:$PATH
+export LANG="en_US.UTF-8"
 
 PYTHON_VERSION_CHECK=$(python3 -c 'import sys; print(sys.version_info < (3, 6, 0))')
 if [[ "$PYTHON_VERSION_CHECK" == "True" ]]; then