diff --git a/test/getenv.sh b/test/getenv.sh
index 8012390..6a735b1 100755
--- a/test/getenv.sh
+++ b/test/getenv.sh
@@ -19,7 +19,7 @@ get_os_version() {
   # Replace " " with _
   utils_version="${utils_version// /_}"
 
-  echo "${os_version}_${bash_version:+bash_${bash_version}}_${utils_version}"
+  echo "${os_version:-"$(uname -s)"}_${bash_version:+bash_${bash_version}}_${utils_version}"
 }
 
 get_os_version