diff --git a/scripts/run_tests.sh b/scripts/run_tests.sh
index e484e5c..ab9d340 100644
--- a/scripts/run_tests.sh
+++ b/scripts/run_tests.sh
@@ -16,8 +16,11 @@ NODE_VER=20
 MONGO_VER=""
 CI_STEP_NAME="Run tests"
 CODE_COVERAGE=false
-while getopts "n:cr:" option; do
+while getopts "m:n:cr:" option; do
     case $option in
+        m) # defines mongo version
+            MONGO_VER=$OPTARG
+            ;;    
         n) # defines node version
             NODE_VER=$OPTARG
              ;;