diff --git a/test/Vagrantfile b/test/Vagrantfile
index db4c03d..868abbf 100644
--- a/test/Vagrantfile
+++ b/test/Vagrantfile
@@ -8,7 +8,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
     d.has_ssh = true
   end
 
-  # tpm is synced with `/root/tmux_plugin_manager` in vagrant
+  # tpm is synced to `/root/tmux_plugin_manager` in vagrant
   config.vm.synced_folder '../', '/root/tmux_plugin_manager'
 
   config.ssh.username = 'root'
diff --git a/test/run b/test/run
index 318f1df..ec36b41 100755
--- a/test/run
+++ b/test/run
@@ -7,7 +7,7 @@ run_vagrant() {
 }
 
 stop_vagrant() {
-	vagrant destroy -f
+	vagrant halt
 }
 
 run_tests() {
diff --git a/test/tests/helpers.sh b/test/tests/test_helpers.sh
similarity index 90%
rename from test/tests/helpers.sh
rename to test/tests/test_helpers.sh
index 207fafc..a5f7b97 100644
--- a/test/tests/helpers.sh
+++ b/test/tests/test_helpers.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+export TEST_FAIL=false
+
 set_tmux_conf_helper() {
 	> ~/.tmux.conf	# empty filename
 	while read -r line; do
@@ -33,8 +35,12 @@ check_dir_exists_helper() {
 	fi
 }
 
+fail_test() {
+	TEST_FAIL=true
+}
+
 exit_value_helper() {
-	if $FAIL; then
+	if $TEST_FAIL; then
 		echo
 		echo "Test failed"
 		exit 1
diff --git a/test/tests/test_plugin_installation.sh b/test/tests/test_plugin_installation.sh
index 57a8731..7594417 100755
--- a/test/tests/test_plugin_installation.sh
+++ b/test/tests/test_plugin_installation.sh
@@ -2,23 +2,21 @@
 
 CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-source $CURRENT_DIR/helpers.sh
-
-export FAIL=false
+source $CURRENT_DIR/test_helpers.sh
 
 test_plugin_installation() {
 	set_tmux_conf_helper <<- HERE
 	set -g @tpm_plugins "bruno-/tmux_example_plugin"
-	run-shell '~/tmux_plugin_manager/tpm'
+	run-shell '/root/tmux_plugin_manager/tpm'
 	HERE
 
 	# opens tmux and test it with `expect`
 	$CURRENT_DIR/expect_successful_plugin_download ||
-		(echo "Tmux plugin installation fails" >&2; FAIL=true)
+		(echo "Tmux plugin installation fails" >&2; fail_test)
 
 	# check plugin dir exists after download
 	check_dir_exists_helper "/root/.tmux/plugins/tmux_example_plugin/" ||
-		(echo "Plugin download fails" >&2; FAIL=true)
+		(echo "Plugin download fails" >&2; fail_test)
 
 	teardown_helper
 }
diff --git a/test/tests/test_plugin_sourcing.sh b/test/tests/test_plugin_sourcing.sh
index 0f89f7f..a63146a 100755
--- a/test/tests/test_plugin_sourcing.sh
+++ b/test/tests/test_plugin_sourcing.sh
@@ -2,9 +2,7 @@
 
 CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
-source $CURRENT_DIR/helpers.sh
-
-export FAIL=false
+source $CURRENT_DIR/test_helpers.sh
 
 check_binding_defined() {
 	local binding=$1
@@ -15,16 +13,17 @@ test_plugin_sourcing() {
 	set_tmux_conf_helper <<- HERE
 	set -g @tpm_plugins "doesnt_matter/tmux_test_plugin"
 	# change this
-	run-shell '~/tmux_plugin_manager/tpm'
+	run-shell '/root/tmux_plugin_manager/tpm'
 	HERE
 
+	# manually creates a local tmux plugin
 	create_test_plugin_helper <<- HERE
 	tmux bind-key R run-shell foo_command
 	HERE
 
 	tmux new-session -d  # tmux starts detached
-	check_binding_defined 'R run-shell foo_command' ||
-		(echo "Plugin sourcing fails" >&2; FAIL=true)
+	check_binding_defined "R run-shell foo_command" ||
+		(echo "Plugin sourcing fails" >&2; fail_test)
 
 	teardown_helper
 }