diff --git a/test/install_script/nvm_install_with_node_version b/test/install_script/nvm_install_with_node_version
index e88ab2b..5f5208f 100755
--- a/test/install_script/nvm_install_with_node_version
+++ b/test/install_script/nvm_install_with_node_version
@@ -5,4 +5,4 @@ die () { echo "$@" ; exit 1; }
 NODE_VERSION=8 \. ../../install.sh
 
 # nvm installed node 8
-(nvm ls | grep 8) > /dev/null 2>&1 || die "nvm didn't install node 8"
+nvm ls 8 > /dev/null 2>&1 || die "nvm didn't install node 8"