diff --git a/test/fast/Unit tests/nvm_get_download_slug b/test/fast/Unit tests/nvm_get_download_slug
new file mode 100755
index 0000000000..a4a0bc4cf1
--- /dev/null
+++ b/test/fast/Unit tests/nvm_get_download_slug	
@@ -0,0 +1,111 @@
+#!/bin/sh
+
+cleanup() {
+    unset nvm_get_os
+    unset nvm_get_arch
+}
+
+die () { cleanup; echo "$@" ; exit 1; }
+
+\. ../../../nvm.sh
+
+[ "$(nvm_get_download_slug 2>/dev/null ; echo $?)" = '1' ] || die 'invalid flavor did not fail with exit code 1'
+[ "$(nvm_get_download_slug 2>&1)" = 'supported flavors: node, iojs' ] || die 'invalid flavor did not fail with expected message'
+
+[ "$(nvm_get_download_slug node 2>/dev/null ; echo $?)" = '2' ] || die 'invalid kind did not fail with exit code 2'
+[ "$(nvm_get_download_slug node 2>&1)" = 'supported kinds: binary, source' ] || die 'invalid kind did not fail with expected message'
+[ "$(nvm_get_download_slug iojs 2>/dev/null ; echo $?)" = '2' ] || die 'invalid kind did not fail with exit code 2'
+[ "$(nvm_get_download_slug iojs 2>&1)" = 'supported kinds: binary, source' ] || die 'invalid kind did not fail with expected message'
+
+nvm_get_os() {
+    echo omgOS
+}
+nvm_get_arch() {
+    echo nemesis
+}
+
+ACTUAL="$(nvm_get_download_slug node binary 1.2.3)"
+EXPECTED='node-1.2.3-omgOS-nemesis'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs binary 1.2.3)"
+EXPECTED='iojs-1.2.3-omgOS-nemesis'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+ACTUAL="$(nvm_get_download_slug node source 1.2.3)"
+EXPECTED="node-1.2.3"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs source 1.2.3)"
+EXPECTED="iojs-1.2.3"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+nvm_get_arch() {
+    echo armv6l
+}
+ACTUAL="$(nvm_get_download_slug node binary 1.2.3)"
+EXPECTED='node-1.2.3-omgOS-arm-pi'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs binary 1.2.3)"
+EXPECTED='iojs-1.2.3-omgOS-arm-pi'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+ACTUAL="$(nvm_get_download_slug node source 1.2.3)"
+EXPECTED="node-1.2.3"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs source 1.2.3)"
+EXPECTED="iojs-1.2.3"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+nvm_get_arch() {
+    echo armv7l
+}
+ACTUAL="$(nvm_get_download_slug node binary 1.2.3)"
+EXPECTED='node-1.2.3-omgOS-arm-pi'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs binary 1.2.3)"
+EXPECTED='iojs-1.2.3-omgOS-arm-pi'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+ACTUAL="$(nvm_get_download_slug node source 1.2.3)"
+EXPECTED="node-1.2.3"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs source 1.2.3)"
+EXPECTED="iojs-1.2.3"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+nvm_get_os() {
+    echo darwin
+}
+nvm_get_arch() {
+    echo nemesis
+}
+ACTUAL="$(nvm_get_download_slug node binary 15.99.99)"
+EXPECTED='node-15.99.99-darwin-nemesis'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs binary 15.99.99)"
+EXPECTED='iojs-15.99.99-darwin-nemesis'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+ACTUAL="$(nvm_get_download_slug node source 15.99.99)"
+EXPECTED="node-15.99.99"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs source 15.99.99)"
+EXPECTED="iojs-15.99.99"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+nvm_get_arch() {
+    echo arm64
+}
+ACTUAL="$(nvm_get_download_slug node binary 15.99.99)"
+EXPECTED='node-15.99.99-darwin-x64'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs binary 15.99.99)"
+EXPECTED='iojs-15.99.99-darwin-x64'
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+
+ACTUAL="$(nvm_get_download_slug node source 15.99.99)"
+EXPECTED="node-15.99.99"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+ACTUAL="$(nvm_get_download_slug iojs source 15.99.99)"
+EXPECTED="iojs-15.99.99"
+[ "${ACTUAL}" = "${EXPECTED}" ] || die "expected >${EXPECTED}<, got >${ACTUAL}<"
+