diff --git a/nodejs.keyring b/nodejs.keyring
new file mode 100644
index 0000000..6e55127
Binary files /dev/null and b/nodejs.keyring differ
diff --git a/update_npm_tarball.sh b/update_npm_tarball.sh
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--- /dev/null
+++ b/update_npm_tarball.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+#
+# Fetch npm module tarball that is required to run unit tests
+# which are not provided by upstream tarball
+#
+set -e
+
+tar Jxf node-v*.tar.xz
+cd node-v*/tools/doc
+npm ci
+cd ../..
+exec tar Jcf ../node_modules.tar.xz tools/doc/node_modules