diff --git a/functionaltests/run_tests_congress_mistral.sh b/functionaltests/run_tests_congress_mistral.sh
index c17e3bda6..953735bda 100755
--- a/functionaltests/run_tests_congress_mistral.sh
+++ b/functionaltests/run_tests_congress_mistral.sh
@@ -5,6 +5,9 @@ source ./run_tests_common.sh
 # Add tempest source tree to PYTHONPATH
 export PYTHONPATH=$PYTHONPATH:$TEMPEST_DIR
 
+# Add tempest config file path to env variables
+export TEMPEST_CONFIG_DIR=${TEMPEST_CONFIG_DIR:-$TEMPEST_DIR/etc/}
+
 #installing requirements for tempest
 pip install -r $TEMPEST_DIR/requirements.txt