diff --git a/nvm.sh b/nvm.sh
index 9d4b1d61944..dbbe4527cfd 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -2922,11 +2922,11 @@ nvm_is_natural_num() {
 
 nvm_write_nvmrc() {
   local VERSION_STRING
-  VERSION_STRING=$(nvm_version "${1-$VERSION_STRING}")
-  if [ "$VERSION_STRING" = '∞' ] || [ "$VERSION_STRING" = 'N/A' ]; then
+  VERSION_STRING=$(nvm_version "${1-}")
+  if [ "${VERSION_STRING}" = '∞' ] || [ "${VERSION_STRING}" = 'N/A' ]; then
     return 1
   fi
-  echo "$VERSION_STRING" | tee "$PWD"/.nvmrc > /dev/null || {
+  echo "${VERSION_STRING}" | tee "$PWD"/.nvmrc > /dev/null || {
     if [ "${NVM_SILENT:-0}" -ne 1 ]; then
       nvm_err "Warning: Unable to write version number ($VERSION_STRING) to .nvmrc"
     fi
diff --git a/test/fast/Unit tests/Running 'nvm install --save' works as expected' b/test/fast/Unit tests/Running 'nvm install --save' works as expected'
index 7f6c565cee3..a020382b07f 100755
--- a/test/fast/Unit tests/Running 'nvm install --save' works as expected'	
+++ b/test/fast/Unit tests/Running 'nvm install --save' works as expected'	
@@ -4,40 +4,58 @@
 
 set -e
 
-TEST_VERSION="v0.2.4"
+TEST_VERSION='v0.2.4'
 
 if [ -f .nvmrc ]; then mv .nvmrc .nvmrc.orig; fi
 
-cleanup () {
+cleanup() {
   nvm cache clear
   nvm deactivate
   nvm unalias default
-  rm -rf ${NVM_DIR}/v* .nvmrc
+  rm -rf "${NVM_DIR}/v0.2.4" .nvmrc
   if [ -f .nvmrc.orig ]; then mv .nvmrc.orig .nvmrc; fi
   unset -f nvm_ls_remote nvm_ls_remote_iojs
 }
 
-die () {
+die() {
   echo "$@"
   cleanup
   exit 1
 }
 
-REMOTE="$PWD/mocks/nvm_ls_remote.txt"
+REMOTE="${PWD}/mocks/nvm_ls_remote.txt"
 nvm_ls_remote() {
-  cat "$REMOTE"
+  if [ -n "${PATTERN}" ]; then
+    cat "${REMOTE}" | \grep "${PATTERN}"
+  else
+    cat "${REMOTE}"
+  fi
 }
 REMOTE_IOJS="$PWD/mocks/nvm_ls_remote_iojs.txt"
 nvm_ls_remote_iojs() {
-  cat "$REMOTE_IOJS"
+  local PATTERN
+  PATTERN="${1-}"
+  if [ -n "${PATTERN}" ]; then
+    cat "${REMOTE_IOJS}" | \grep "${PATTERN}"
+  else
+    cat "${REMOTE_IOJS}"
+  fi
 }
 
-make_fake_node "$TEST_VERSION"
+make_fake_node "${TEST_VERSION}"
 
-nvm install --save "$TEST_VERSION" || die "\`nvm install --save $TEST_VERSION\` failed"
+nvm install -w "${TEST_VERSION}" || die "\`nvm install -w ${TEST_VERSION}\` failed"
 OUTPUT="$(cat .nvmrc)"
 
-nvm_is_valid_version "$(cat .nvmrc)" \
-  || die "\`nvm install --save $TEST_VERSION\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
+nvm_is_valid_version "${OUTPUT}" \
+  || die "\`nvm install -w ${TEST_VERSION}\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
+
+rm .nvmrc || die 'removing of .nvmrc failed'
+
+nvm install --save "${TEST_VERSION}" || die "\`nvm install --save ${TEST_VERSION}\` failed"
+OUTPUT="$(cat .nvmrc)"
+
+nvm_is_valid_version "${OUTPUT}" \
+  || die "\`nvm install --save ${TEST_VERSION}\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
 
 cleanup
diff --git a/test/fast/Unit tests/Running 'nvm use --save' works as expected' b/test/fast/Unit tests/Running 'nvm use --save' works as expected'
new file mode 100755
index 00000000000..a1880729698
--- /dev/null
+++ b/test/fast/Unit tests/Running 'nvm use --save' works as expected'	
@@ -0,0 +1,61 @@
+#!/bin/sh
+\. ../../../nvm.sh
+\. ../../common.sh
+
+set -e
+
+TEST_VERSION='v0.2.4'
+
+if [ -f .nvmrc ]; then mv .nvmrc .nvmrc.orig; fi
+
+cleanup() {
+  nvm cache clear
+  nvm deactivate
+  nvm unalias default
+  rm -rf "${NVM_DIR}/v0.2.4" .nvmrc
+  if [ -f .nvmrc.orig ]; then mv .nvmrc.orig .nvmrc; fi
+  unset -f nvm_ls_remote nvm_ls_remote_iojs
+}
+
+die() {
+  echo "$@"
+  cleanup
+  exit 1
+}
+
+REMOTE="${PWD}/mocks/nvm_ls_remote.txt"
+nvm_ls_remote() {
+  if [ -n "${PATTERN}" ]; then
+    cat "${REMOTE}" | \grep "${PATTERN}"
+  else
+    cat "${REMOTE}"
+  fi
+}
+REMOTE_IOJS="$PWD/mocks/nvm_ls_remote_iojs.txt"
+nvm_ls_remote_iojs() {
+  local PATTERN
+  PATTERN="${1-}"
+  if [ -n "${PATTERN}" ]; then
+    cat "${REMOTE_IOJS}" | \grep "${PATTERN}"
+  else
+    cat "${REMOTE_IOJS}"
+  fi
+}
+
+make_fake_node "${TEST_VERSION}"
+
+nvm use -w "${TEST_VERSION}" || die "\`nvm install -w ${TEST_VERSION}\` failed"
+OUTPUT="$(cat .nvmrc)"
+
+nvm_is_valid_version "${OUTPUT}" \
+  || die "\`nvm install -w ${TEST_VERSION}\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
+
+rm .nvmrc || die 'removing of .nvmrc failed'
+
+nvm use --save "${TEST_VERSION}" || die "\`nvm install --save ${TEST_VERSION}\` failed"
+OUTPUT="$(cat .nvmrc)"
+
+nvm_is_valid_version "${OUTPUT}" \
+  || die "\`nvm install --save ${TEST_VERSION}\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
+
+cleanup
diff --git a/test/fast/Unit tests/Running 'nvm use --silent --save' doesn't output anything b/test/fast/Unit tests/Running 'nvm use --silent --save' doesn't output anything
index 0df42514223..578c3155d43 100755
--- a/test/fast/Unit tests/Running 'nvm use --silent --save' doesn't output anything	
+++ b/test/fast/Unit tests/Running 'nvm use --silent --save' doesn't output anything	
@@ -12,7 +12,7 @@ cleanup () {
   nvm cache clear
   nvm deactivate
   nvm unalias default
-  rm -rf ${NVM_DIR}/v* .nvmrc
+  rm -rf "${NVM_DIR}/${TEST_VERSION:?}" .nvmrc
   if [ -f .nvmrc.orig ]; then mv .nvmrc.orig .nvmrc; fi
   unset -f nvm_ls_remote nvm_ls_remote_iojs
 }
@@ -23,21 +23,29 @@ die () {
   exit 1
 }
 
-REMOTE="$PWD/mocks/nvm_ls_remote.txt"
+REMOTE="${PWD}/mocks/nvm_ls_remote.txt"
 nvm_ls_remote() {
-  cat "$REMOTE"
+  cat "${REMOTE}"
 }
-REMOTE_IOJS="$PWD/mocks/nvm_ls_remote_iojs.txt"
+REMOTE_IOJS="${PWD}/mocks/nvm_ls_remote_iojs.txt"
 nvm_ls_remote_iojs() {
-  cat "$REMOTE_IOJS"
+  cat "${REMOTE_IOJS}"
 }
 
-make_fake_node "$TEST_VERSION"
+make_fake_node "${TEST_VERSION}"
 
-OUTPUT=$(nvm use --save --silent "$TEST_VERSION" || die "\`nvm use --save --silent $TEST_VERSION\` failed")
-EXPECTED_OUTPUT=""
+OUTPUT=$(nvm use --save --silent "${TEST_VERSION}" || die "\`nvm use --save --silent ${TEST_VERSION}\` failed")
+EXPECTED_OUTPUT=''
 
-[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] \
-  || die "\`nvm use --save --silent $TEST_VERSION\` output was not silenced to '$EXPECTED_OUTPUT'; got '$OUTPUT'"
+[ "_${OUTPUT}" = "_${EXPECTED_OUTPUT}" ] \
+  || die "\`nvm use --save --silent ${TEST_VERSION}\` output was not silenced to '${EXPECTED_OUTPUT}'; got '${OUTPUT}'"
+
+rm .nvmrc || die 'removing of .nvmrc failed'
+
+OUTPUT=$(nvm use -w --silent "${TEST_VERSION}" || die "\`nvm use -w --silent ${TEST_VERSION}\` failed")
+EXPECTED_OUTPUT=''
+
+[ "_${OUTPUT}" = "_${EXPECTED_OUTPUT}" ] \
+  || die "\`nvm use -w --silent ${TEST_VERSION}\` output was not silenced to '${EXPECTED_OUTPUT}'; got '${OUTPUT}'"
 
 cleanup
diff --git a/test/fast/Unit tests/Running 'nvm use -w' works as expected' b/test/fast/Unit tests/Running 'nvm use -w' works as expected'
deleted file mode 100755
index afa5835987a..00000000000
--- a/test/fast/Unit tests/Running 'nvm use -w' works as expected'	
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/bin/sh
-\. ../../../nvm.sh
-
-set -e
-
-if [ -f .nvmrc ]; then mv .nvmrc .nvmrc.orig; fi
-
-TEST_VERSION="v0.2.4"
-
-cleanup () {
-  nvm cache clear
-  nvm deactivate
-  nvm unalias default
-  rm -rf ${NVM_DIR}/v* .nvmrc
-  if [ -f .nvmrc.orig ]; then mv .nvmrc.orig .nvmrc; fi
-  unset -f nvm_ls_remote nvm_ls_remote_iojs
-}
-
-die () {
-  echo "$@"
-  cleanup
-  exit 1
-}
-
-nvm deactivate 2>/dev/null || die 'unable to deactivate'
-
-\. ../../common.sh
-
-REMOTE="$PWD/mocks/nvm_ls_remote.txt"
-nvm_ls_remote() {
-  cat "$REMOTE"
-}
-REMOTE_IOJS="$PWD/mocks/nvm_ls_remote_iojs.txt"
-nvm_ls_remote_iojs() {
-  cat "$REMOTE_IOJS"
-}
-
-make_fake_node "$TEST_VERSION"
-
-# 1. install
-
-nvm install -w "$TEST_VERSION" || die "\`nvm install -w $TEST_VERSION\` failed"
-OUTPUT="$(cat .nvmrc)"
-
-nvm_is_valid_version "$(cat .nvmrc)" \
-  || die "\`nvm install -w $TEST_VERSION\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
-
-#
-
-unset OUTPUT
-
-# 2. use
-
-nvm use -w "$TEST_VERSION" || die "\`nvm use -w $TEST_VERSION\` failed"
-OUTPUT="$(cat .nvmrc)"
-
-nvm_is_valid_version "$(cat .nvmrc)" \
-  || die "\`nvm use -w $TEST_VERSION\`+ \`cat .nvmrc\` outputted invalid version: got '${OUTPUT}'"
-
-#
-
-cleanup
diff --git a/test/fast/Unit tests/nvm ls-remote b/test/fast/Unit tests/nvm ls-remote
index bb1ac944653..0c65bfb57fe 100755
--- a/test/fast/Unit tests/nvm ls-remote	
+++ b/test/fast/Unit tests/nvm ls-remote	
@@ -22,11 +22,11 @@ nvm deactivate 2>/dev/null || die 'unable to deactivate'
 
 \. ../../common.sh
 
-MOCKS_DIR="$PWD/mocks"
+MOCKS_DIR="${PWD}/mocks"
 
 nvm_download() {
   if [ "$*" = "-L -s $(nvm_get_mirror node std)/index.tab -o -" ]; then
-    cat "$MOCKS_DIR/nodejs.org-dist-index.tab"
+    cat "${MOCKS_DIR}/nodejs.org-dist-index.tab"
     return
   fi
   return 42
@@ -34,15 +34,15 @@ nvm_download() {
 
 EXPECTED_OUTPUT_PATH="${MOCKS_DIR}/nvm ls-remote lts.txt"
 OUTPUT="$(nvm ls-remote --lts | sed 's/[ \t]*$//')"
-EXPECTED_OUTPUT="$(cat "$EXPECTED_OUTPUT_PATH" | sed 's/[ \t]*$//' )"
-[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] || die "nvm ls-remote --lts did not output expected sorted versions; got $(echo ">$OUTPUT<") expected $(echo ">$EXPECTED_OUTPUT<")"
+EXPECTED_OUTPUT="$(cat "${EXPECTED_OUTPUT_PATH}" | sed 's/[ \t]*$//' )"
+[ "_${OUTPUT}" = "_${EXPECTED_OUTPUT}" ] || die "nvm ls-remote --lts did not output expected sorted versions; got >${OUTPUT}< expected >${EXPECTED_OUTPUT}<"
 
 EXPECTED_OUTPUT_PATH="${MOCKS_DIR}/nvm ls-remote lts.txt"
 OUTPUT="$(nvm ls-remote "lts/*" | sed 's/[ \t]*$//')"
-EXPECTED_OUTPUT="$(cat "$EXPECTED_OUTPUT_PATH" | sed 's/[ \t]*$//' )"
-[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] || die "nvm ls-remote lts/* did not output expected sorted versions; got $(echo ">$OUTPUT<") expected $(echo ">$EXPECTED_OUTPUT<")"
+EXPECTED_OUTPUT="$(cat "${EXPECTED_OUTPUT_PATH}" | sed 's/[ \t]*$//' )"
+[ "_${OUTPUT}" = "_${EXPECTED_OUTPUT}" ] || die "nvm ls-remote lts/* did not output expected sorted versions; got >${OUTPUT}< expected >${EXPECTED_OUTPUT}<"
 
-MOCKS_DIR="$PWD/mocks"
+MOCKS_DIR="${PWD}/mocks"
 LTS_NAMES_PATH="${MOCKS_DIR}/LTS_names.txt"
 LTS_LIST="$(cat "${LTS_NAMES_PATH}" | tail -n +2)"
 
@@ -56,18 +56,18 @@ printf '%s\n' "${LTS_LIST}" | while IFS= read -r LTS; do
   INDEX=$(($INDEX + 1))
 done
 
-REMOTE="$PWD/mocks/nvm_ls_remote.txt"
+REMOTE="${PWD}/mocks/nvm_ls_remote.txt"
 nvm_ls_remote() {
-  cat "$REMOTE"
+  cat "${REMOTE}"
 }
-REMOTE_IOJS="$PWD/mocks/nvm_ls_remote_iojs.txt"
+REMOTE_IOJS="${PWD}/mocks/nvm_ls_remote_iojs.txt"
 nvm_ls_remote_iojs() {
-  cat "$REMOTE_IOJS"
+  cat "${REMOTE_IOJS}"
 }
 
 EXPECTED_OUTPUT_PATH="${MOCKS_DIR}/nvm ls-remote.txt"
 OUTPUT="$(nvm ls-remote | sed 's/[ \t]*$//')"
-EXPECTED_OUTPUT="$(cat "$EXPECTED_OUTPUT_PATH" | sed 's/[ \t]*$//' )"
-[ "_$OUTPUT" = "_$EXPECTED_OUTPUT" ] || die "bare nvm ls-remote did not output expected sorted versions; got $(echo ">$OUTPUT<") expected $(echo ">$EXPECTED_OUTPUT<")"
+EXPECTED_OUTPUT="$(cat "${EXPECTED_OUTPUT_PATH}" | sed 's/[ \t]*$//' )"
+[ "_${OUTPUT}" = "_${EXPECTED_OUTPUT}" ] || die "bare nvm ls-remote did not output expected sorted versions; got >${OUTPUT}< expected >${EXPECTED_OUTPUT}<"
 
 cleanup
diff --git a/test/fast/Unit tests/nvm_download b/test/fast/Unit tests/nvm_download
index fcb58e29a7e..9211b81722f 100755
--- a/test/fast/Unit tests/nvm_download	
+++ b/test/fast/Unit tests/nvm_download	
@@ -17,13 +17,12 @@ nvm_download "https://raw.githubusercontent.com/nvm-sh/nvm/HEAD/install.sh" >/de
 ! nvm_download "https://raw.githubusercontent.com/nvm-sh/nvm/HEAD/wrong_install.sh" >/dev/null || die "nvm_download should fail to download no existing file"
 
 # nvm_download should pass when calling with auth header
-docker pull kennethreitz/httpbin && docker run --shell=bash -d --name httpbin -p 80:80 kennethreitz/httpbin
+docker pull kennethreitz/httpbin && SHELL=bash docker run -d --name httpbin -p 80:80 kennethreitz/httpbin
 sleep 1 # wait for httpbin to start
 NVM_AUTH_HEADER="Bearer test-token" nvm_download "http://127.0.0.1/bearer" > /dev/null || die 'nvm_download with auth header should send correctly'
 
 # nvm_download should fail when calling without auth header
 nvm_download "http://127.0.0.1/bearer" > /dev/null && die 'nvm_download with no auth header should not send the header and should fail'
-docker stop httpbin && docker rm httpbin
 
 # ensure quoted extra args remain quoted
 nvm_download "https://raw.githubusercontent.com/nvm-sh/nvm/HEAD/install.sh" -o "; die quoted-command-not-quoted" || die 'command failed'
diff --git a/test/fast/Unit tests/nvm_get_default_packages b/test/fast/Unit tests/nvm_get_default_packages
index c57ace933f9..d8a8157bc2f 100755
--- a/test/fast/Unit tests/nvm_get_default_packages	
+++ b/test/fast/Unit tests/nvm_get_default_packages	
@@ -2,27 +2,29 @@
 
 \. ../../../nvm.sh
 
-FILE="$NVM_DIR/default-packages"
+FILE="${NVM_DIR}/default-packages"
 
 die () { echo "$@" ; cleanup ; exit 1; }
 setup () {
-  if [ -f $FILE ]; then
-    ORIG_DEFAULT_PACKAGES=$(cat $FILE)
+  if [ -f "${FILE}" ]; then
+    ORIG_DEFAULT_PACKAGES=$(cat "${FILE}")
     mkdir -p ./tmp/ ||:
-    mv $FILE ./tmp/default-packages ||:
+    mv "${FILE}" ./tmp/default-packages ||:
   fi
-  touch $FILE
+  touch "${FILE}"
 }
 cleanup () {
-  if [ "$ORIG_DEFAULT_PACKAGES" != "" ]; then
+  if [ "${ORIG_DEFAULT_PACKAGES}" != "" ]; then
     rm -rf ./tmp/
-    echo "$ORIG_DEFAULT_PACKAGES" > $FILE
+    echo "${ORIG_DEFAULT_PACKAGES}" > "${FILE}"
+  else
+    rm "${FILE}"
   fi
 }
 
 setup
 
-cat > $FILE << EOF
+cat > "${FILE}" << EOF
 rimraf
 object-inspect@1.0.2
 
@@ -39,7 +41,7 @@ cleanup
 
 setup
 
-cat > $FILE << EOF
+cat > "${FILE}" << EOF
 rimraf
 not~a~package~name
 mkdirp
@@ -53,12 +55,12 @@ cleanup
 
 setup
 
-cat > $FILE << EOF
+cat > "${FILE}" << EOF
 rimraf
 not~a~package~name
 mkdirp
 EOF
-printf %s "$(cat "${FILE}")" > $FILE # strip trailing newline
+printf %s "$(cat "${FILE}")" > "${FILE}" # strip trailing newline
 
 DEFAULT_PKGS="$(nvm_get_default_packages)"
 EXPECTED_PKGS='rimraf not~a~package~name mkdirp'
@@ -68,7 +70,7 @@ cleanup
 
 setup
 
-cat > $FILE << EOF
+cat > "${FILE}" << EOF
 object-inspect @ 1.0.2
 rimraf
 EOF
@@ -81,12 +83,12 @@ cleanup
 
 setup
 
-rm -rf $FILE
+rm -rf "${FILE}"
 
 DEFAULT_PKGS="$(nvm_get_default_packages)"
 EXPECTED_PKGS=''
 [ "${DEFAULT_PKGS}" = "${EXPECTED_PKGS}" ] || die "5: expected default packages >${EXPECTED_PKGS}<; got >${DEFAULT_PKGS}<"
 
-touch $FILE
+touch "${FILE}"
 
 cleanup
diff --git a/test/fast/Unit tests/nvm_install_binary_extract b/test/fast/Unit tests/nvm_install_binary_extract
index 8b8782a5b8e..b2a9594e606 100755
--- a/test/fast/Unit tests/nvm_install_binary_extract	
+++ b/test/fast/Unit tests/nvm_install_binary_extract	
@@ -1,33 +1,48 @@
 #!/bin/sh
 
-cleanup () {
-  [ -d "$tmp_dir" ] && rm -rf "$tmp_dir"
-  [ -d "$NVM_DIR" ] && rm -rf "$NVM_DIR"
+cleanup() {
+  [ -d "${tmp_dir}" ] && rm -rf "${tmp_dir}"
+  [ -d "${NVM_DIR}" ] && rm -rf "${NVM_DIR}"
   unset -f die cleanup test_archi nvm_supports_xz
   unset NVM_DIR tmp_dir version archi
 }
 
-die () { echo "$@" ; cleanup ; exit 1; }
+die() { echo "$@" ; cleanup ; exit 1; }
 
-test_archi(){
-  local os="$1"
-  local version="$2"
-  local archi="$os-$3"
-  local node="$4"
-  local ext="$5"
-  local command="$6"
-  local command_option="$7"
-  local node_path="$tmp_dir/node-$version-$archi/$node"
+test_archi() {
+  local os
+  os="$1"
+  local version
+  version="$2"
+  local archi
+  archi="$os-$3"
+  local node
+  node="$4"
+  local ext
+  ext="$5"
+  local command
+  command="$6"
+  local command_option
+  command_option="$7"
+  local node_dir
+  node_dir="${tmp_dir}/node-${version}-${archi}"
+  local node_path
+  node_path="${node_dir}/${node}"
 
   # Create tarball
-  mkdir -p "$(dirname "$node_path")"
-  echo "node $version" > "$node_path"
-  (cd "$tmp_dir" && "$command" "$command_option" "$tmp_dir/node-$version-$archi.$ext" "node-$version-$archi" && rm -rf "$tmp_dir/node-$version-$archi")
-  [ -f "$tmp_dir/node-$version-$archi.$ext" ] || die "Unable to create fake $ext file"
+  mkdir -p "${node_dir}"
+  echo "node ${version}" > "${node_path}"
+  (cd "${tmp_dir}" && "${command}" "${command_option}" "${node_dir}.${ext}" "node-${version}-${archi}")
+  [ -f "${node_dir}.${ext}" ] || die "Unable to create fake ${ext} file"
+
+  if [ "${os}" = 'win' ]; then
+    mkdir -p "${tmp_dir}/${version}/bin"
+    touch "${tmp_dir}/${version}/bin/node.exe"
+  fi
 
   # Extract it
-  nvm_install_binary_extract "$os" "$version" "${version:1}" "$tmp_dir/node-$version-$archi.$ext" "$tmp_dir/files"
-  [ "$(cat "$NVM_DIR/versions/node/$version/bin/node")" = "node $version" ] || die "Unable to extract $ext file"
+  nvm_install_binary_extract "$os" "$version" "${version:1}" "${node_dir}.$ext" "${tmp_dir}/files"
+  [ "$(cat "${NVM_DIR}/versions/node/${version}/bin/node")" = "node ${version}" ] || die "Unable to extract ${ext} file"
 }
 
 \. ../../../nvm.sh
@@ -39,7 +54,7 @@ type nvm_install_binary_extract > /dev/null 2>&1 || die 'nvm_install_binary_extr
 
 NVM_DIR=$(mktemp -d)
 tmp_dir=$(mktemp -d)
-if [ -z "$NVM_DIR" ] || [ -z "$tmp_dir" ]; then
+if [ -z "${NVM_DIR}" ] || [ -z "${tmp_dir}" ]; then
   die 'Unable to create temporary folder'
 fi
 
@@ -49,7 +64,7 @@ test_archi 'win' 'v15.6.0' 'x64' 'node' 'zip' 'zip' '-qr'
 # Test linux tar.xz
 test_archi 'linux' 'v14.15.4' 'x64' 'bin/node' 'tar.xz' 'tar' '-cJf'
 
-nvm_supports_xz(){
+nvm_supports_xz() {
   return 1
 }
 
diff --git a/test/fast/Unit tests/nvm_install_no_progress_bar b/test/fast/Unit tests/nvm_install_no_progress_bar
index d43194dc879..5687f0c3750 100755
--- a/test/fast/Unit tests/nvm_install_no_progress_bar	
+++ b/test/fast/Unit tests/nvm_install_no_progress_bar	
@@ -13,11 +13,9 @@ die () { >&2 echo "$@" ; cleanup ; exit 1; }
 
 \. ../../../nvm.sh
 
-nvm_has_colors() { return 1 ; }
-
 cleanup
 
-OUTPUT="$(2>&1 nvm install --no-progress v0.12.18)"
+OUTPUT="$(TERM=dumb 2>&1 nvm install --no-progress v0.12.18)"
 EXPECTED_OUTPUT="Downloading and installing node v0.12.18...
 Downloading https://nodejs.org/dist/v0.12.18/node-v0.12.18-linux-x64.tar.xz...
 Computing checksum with sha256sum
@@ -25,19 +23,29 @@ Checksums matched!
 Now using node v0.12.18 (npm v2.15.11)
 Creating default alias: default -> v0.12.18 *"
 
-[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "expected >${EXPECTED_OUTPUT}<, got >${OUTPUT}<"
+[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "1: expected >
+${EXPECTED_OUTPUT}<, got >
+${OUTPUT}<"
 
 cleanup
 
-OUTPUT="$(2>&1 nvm install v0.12.18)"
+OUTPUT="$(TERM=dumb 2>&1 nvm install v0.12.18)"
 EXPECTED_OUTPUT="Downloading and installing node v0.12.18...
 Downloading https://nodejs.org/dist/v0.12.18/node-v0.12.18-linux-x64.tar.xz...
-######################################################################## 100.0%
+######################################################################### 100.0%
 Computing checksum with sha256sum
 Checksums matched!
 Now using node v0.12.18 (npm v2.15.11)
 Creating default alias: default -> v0.12.18 *"
 
-[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "expected >${EXPECTED_OUTPUT}<, got >${OUTPUT}<"
+[ "$(echo "${OUTPUT}" | wc -l)" = "$(echo "${EXPECTED_OUTPUT}" | wc -l)" ] || die "2: expected 7 lines, got $(echo "${OUTPUT}" | wc -l)"
+
+echo "${OUTPUT}" > a
+echo "${EXPECTED_OUTPUT}" > b
+comm -2 -3 a b || die "3: comm failed"
+
+[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || (diff "${OUTPUT}" "${EXPECTED_OUTPUT}" ; die "4: expected >
+${EXPECTED_OUTPUT}<, got >
+${OUTPUT}<")
 
 cleanup