diff --git a/_test/lib.sh b/_test/lib.sh
index 8d2603565e..82e7e260f1 100644
--- a/_test/lib.sh
+++ b/_test/lib.sh
@@ -15,7 +15,7 @@ function install-helm {
   mkdir -p .bin
   (
     cd .bin
-    curl -s https://get.helm.sh | sh
+    curl -s https://get.helm.sh | bash
   )
   export PATH="$(pwd)/.bin:${PATH}"