diff --git a/test/container/utils/container_prep.py b/test/container/utils/container_prep.py
index 8788f5b..5a0e8a1 100644
--- a/test/container/utils/container_prep.py
+++ b/test/container/utils/container_prep.py
@@ -144,6 +144,11 @@
 
 def main():
     """Entry point."""
+
+    if not (sys.version_info.major == 3 and sys.version_info.minor >= 6):
+        print('python3.6 or greater is required.')
+        sys.exit(1)
+
     args = parse_local_arguments()
     builder = DockerPrep(args)
     builder.config_paths()
diff --git a/test/container/utils/container_prep_caller.sh b/test/container/utils/container_prep_caller.sh
index e88d2d8..08f1780 100644
--- a/test/container/utils/container_prep_caller.sh
+++ b/test/container/utils/container_prep_caller.sh
@@ -29,4 +29,4 @@
 create_venv
 
 # $chroot_path $sysroot_path $output_path are set as ENV VAR's.
-python3.6 container_prep.py -chroot=${chroot_path} -sysroot=${sysroot_path} -path=${output_path} -force_path=True -src=${src_root}
+python3 container_prep.py -chroot=${chroot_path} -sysroot=${sysroot_path} -path=${output_path} -force_path=True -src=${src_root}