diff --git a/.gitmodules b/.gitmodules
index 536f6e9283..4e1155917e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,11 +1,12 @@
 [submodule "test_lib/bats-core"]
 	path = test_lib/bats-core
 	url = https://github.com/bats-core/bats-core
-	branch = tags/v1.9.0
+	branch = tags/v1.11.1
 [submodule "test_lib/bats-support"]
 	path = test_lib/bats-support
 	url = https://github.com/bats-core/bats-support
-	branch = tags/v0.3.0
+	branch = master
+	#branch = tags/v0.3.0
 [submodule "test_lib/bats-assert"]
 	path = test_lib/bats-assert
 	url = https://github.com/bats-core/bats-assert
@@ -13,4 +14,4 @@
 [submodule "test_lib/bats-file"]
 	path = test_lib/bats-file
 	url = https://github.com/bats-core/bats-file
-	branch = tags/v0.4.0
+	branch = master
diff --git a/install.sh b/install.sh
index 4063f516ed..d53ca65a6e 100755
--- a/install.sh
+++ b/install.sh
@@ -82,8 +82,8 @@ function _bash-it_check_for_backup() {
 	fi
 	echo -e "\033[0;33mBackup file already exists. Make sure to backup your .bashrc before running this installation.\033[0m" >&2
 
-	if [[ -z "${overwrite_backup}" ]]; then
-		while [[ -z "${silent}" ]]; do
+	if [[ -z "${overwrite_backup:-}" ]]; then
+		while [[ -z "${silent:-}" ]]; do
 			read -e -n 1 -r -p "Would you like to overwrite the existing backup? This will delete your existing backup file ($HOME/$BACKUP_FILE) [y/N] " RESP
 			case $RESP in
 				[yY])
@@ -99,9 +99,9 @@ function _bash-it_check_for_backup() {
 			esac
 		done
 	fi
-	if [[ -z "${overwrite_backup}" ]]; then
+	if [[ -z "${overwrite_backup:-}" ]]; then
 		echo -e "\033[91mInstallation aborted. Please come back soon!\033[m"
-		if [[ -n "${silent}" ]]; then
+		if [[ -n "${silent:-}" ]]; then
 			echo -e "\033[91mUse \"-f\" flag to force overwrite of backup.\033[m"
 		fi
 		exit 1
@@ -113,8 +113,8 @@ function _bash-it_check_for_backup() {
 function _bash-it_modify_config_files() {
 	_bash-it_check_for_backup
 
-	if [[ -z "${silent}" ]]; then
-		while [[ -z "${append_to_config}" ]]; do
+	if [[ -z "${silent:-}" ]]; then
+		while [[ -z "${append_to_config:-}" ]]; do
 			read -e -n 1 -r -p "Would you like to keep your $CONFIG_FILE and append bash-it templates at the end? [y/N] " choice
 			case $choice in
 				[yY])
@@ -130,7 +130,7 @@ function _bash-it_modify_config_files() {
 			esac
 		done
 	fi
-	if [[ -n "${append_to_config}" ]]; then
+	if [[ -n "${append_to_config:-}" ]]; then
 		# backup/append
 		_bash-it_backup_append
 	else
@@ -173,12 +173,12 @@ done
 
 shift $((OPTIND - 1))
 
-if [[ -n "${silent}" && -n "${interactive}" ]]; then
+if [[ -n "${silent:-}" && -n "${interactive:-}" ]]; then
 	echo -e "\033[91mOptions --silent and --interactive are mutually exclusive. Please choose one or the other.\033[m"
 	exit 1
 fi
 
-if [[ -n "${no_modify_config}" && -n "${append_to_config}" ]]; then
+if [[ -n "${no_modify_config:-}" && -n "${append_to_config:-}" ]]; then
 	echo -e "\033[91mOptions --no-modify-config and --append-to-config are mutually exclusive. Please choose one or the other.\033[m"
 	exit 1
 fi
@@ -220,7 +220,7 @@ cite _about _param _example _group _author _version
 # shellcheck source=./lib/helpers.bash
 source "$BASH_IT/lib/helpers.bash"
 
-if [[ -n $interactive && -z "${silent}" ]]; then
+if [[ -n ${interactive:-} && -z "${silent:-}" ]]; then
 	for type in "aliases" "plugins" "completion"; do
 		echo -e "\033[0;32mEnabling ${type}\033[0m"
 		_bash-it_load_some "$type"
diff --git a/test/lib/helpers.bats b/test/lib/helpers.bats
index 806a0ce8c0..6d41121822 100644
--- a/test/lib/helpers.bats
+++ b/test/lib/helpers.bats
@@ -40,7 +40,7 @@ function local_setup() {
 }
 
 @test "helpers: bash-it help list aliases with ag aliases enabled" {
-	ln -s "${BASH_IT?}/aliases/available/ag.aliases.bash" "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/ag.aliases.bash" "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
 	assert_link_exist "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
 
 	run _help-list-aliases "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
@@ -48,7 +48,7 @@ function local_setup() {
 }
 
 @test "helpers: bash-it help list aliases with todo.txt-cli aliases enabled" {
-	ln -s "${BASH_IT?}/aliases/available/todo.txt-cli.aliases.bash" "${BASH_IT?}/aliases/enabled/150---todo.txt-cli.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/todo.txt-cli.aliases.bash" "${BASH_IT?}/aliases/enabled/150---todo.txt-cli.aliases.bash"
 	assert_link_exist "${BASH_IT?}/aliases/enabled/150---todo.txt-cli.aliases.bash"
 
 	run _help-list-aliases "${BASH_IT?}/aliases/enabled/150---todo.txt-cli.aliases.bash"
@@ -56,7 +56,7 @@ function local_setup() {
 }
 
 @test "helpers: bash-it help list aliases with docker-compose aliases enabled" {
-	ln -s "${BASH_IT?}/aliases/available/docker-compose.aliases.bash" "${BASH_IT?}/aliases/enabled/150---docker-compose.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/docker-compose.aliases.bash" "${BASH_IT?}/aliases/enabled/150---docker-compose.aliases.bash"
 	assert_link_exist "${BASH_IT?}/aliases/enabled/150---docker-compose.aliases.bash"
 
 	run _help-list-aliases "${BASH_IT?}/aliases/enabled/150---docker-compose.aliases.bash"
@@ -64,7 +64,7 @@ function local_setup() {
 }
 
 @test "helpers: bash-it help list aliases with ag aliases enabled in global directory" {
-	ln -s "${BASH_IT?}/aliases/available/ag.aliases.bash" "${BASH_IT?}/enabled/150---ag.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/ag.aliases.bash" "${BASH_IT?}/enabled/150---ag.aliases.bash"
 	assert_link_exist "${BASH_IT?}/enabled/150---ag.aliases.bash"
 
 	run _help-list-aliases "${BASH_IT?}/enabled/150---ag.aliases.bash"
@@ -72,7 +72,7 @@ function local_setup() {
 }
 
 @test "helpers: bash-it help aliases one alias enabled in the old directory" {
-	ln -s "${BASH_IT?}/aliases/available/ag.aliases.bash" "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/ag.aliases.bash" "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
 	assert_link_exist "${BASH_IT?}/aliases/enabled/150---ag.aliases.bash"
 
 	run bash-it help aliases
@@ -192,7 +192,7 @@ function local_setup() {
 }
 
 @test "helpers: disable the nvm plugin if it was enabled with a priority, but in the component-specific directory" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 	assert [ ! -L "${BASH_IT?}/enabled/225---nvm.plugin.bash" ]
 
@@ -203,7 +203,7 @@ function local_setup() {
 }
 
 @test "helpers: disable the nvm plugin if it was enabled without a priority" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 
 	run _disable-plugin "nvm"
@@ -212,7 +212,7 @@ function local_setup() {
 }
 
 @test "helpers: enable the nvm plugin if it was enabled without a priority" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 
 	run _enable-plugin "nvm"
@@ -223,7 +223,7 @@ function local_setup() {
 }
 
 @test "helpers: enable the nvm plugin if it was enabled with a priority, but in the component-specific directory" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 
 	run _enable-plugin "nvm"
@@ -404,10 +404,10 @@ function local_setup() {
 }
 
 @test "helpers: migrate plugins and completions that share the same name" {
-	ln -s "${BASH_IT?}/completion/available/dirs.completion.bash" "${BASH_IT?}/completion/enabled/350---dirs.completion.bash"
+	run ln -s "${BASH_IT?}/completion/available/dirs.completion.bash" "${BASH_IT?}/completion/enabled/350---dirs.completion.bash"
 	assert_link_exist "${BASH_IT?}/completion/enabled/350---dirs.completion.bash"
 
-	ln -s "${BASH_IT?}/plugins/available/dirs.plugin.bash" "${BASH_IT?}/plugins/enabled/250---dirs.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/dirs.plugin.bash" "${BASH_IT?}/plugins/enabled/250---dirs.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/250---dirs.plugin.bash"
 
 	run _bash-it-migrate
@@ -426,13 +426,13 @@ function local_setup() {
 }
 
 @test "helpers: migrate enabled plugins that don't use the new priority-based configuration" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 
-	ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/node.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/node.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/node.plugin.bash"
 
-	ln -s "${BASH_IT?}/aliases/available/todo.txt-cli.aliases.bash" "${BASH_IT?}/aliases/enabled/todo.txt-cli.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/todo.txt-cli.aliases.bash" "${BASH_IT?}/aliases/enabled/todo.txt-cli.aliases.bash"
 	assert_link_exist "${BASH_IT?}/aliases/enabled/todo.txt-cli.aliases.bash"
 
 	run _enable-plugin "ssh"
@@ -453,13 +453,13 @@ function local_setup() {
 }
 
 @test "helpers: migrate enabled plugins that use the new priority-based configuration in the individual directories" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 
-	ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
 
-	ln -s "${BASH_IT?}/aliases/available/todo.txt-cli.aliases.bash" "${BASH_IT?}/aliases/enabled/250---todo.txt-cli.aliases.bash"
+	run ln -s "${BASH_IT?}/aliases/available/todo.txt-cli.aliases.bash" "${BASH_IT?}/aliases/enabled/250---todo.txt-cli.aliases.bash"
 	assert_link_exist "${BASH_IT?}/aliases/enabled/250---todo.txt-cli.aliases.bash"
 
 	run _enable-plugin "ssh"
@@ -495,9 +495,9 @@ function __migrate_all_components() {
 	for f in "${BASH_IT}/$subdirectory/available/"*.bash; do
 		to_enable=$(basename "$f")
 		if [[ -z "$priority" ]]; then
-			ln -s "../available/$to_enable" "${BASH_IT}/${subdirectory}/enabled/$to_enable"
+			run ln -s "../available/$to_enable" "${BASH_IT}/${subdirectory}/enabled/$to_enable"
 		else
-			ln -s "../available/$to_enable" "${BASH_IT}/${subdirectory}/enabled/$priority---$to_enable"
+			run ln -s "../available/$to_enable" "${BASH_IT}/${subdirectory}/enabled/$priority---$to_enable"
 		fi
 	done
 
@@ -566,7 +566,7 @@ function __migrate_all_components() {
 }
 
 @test "helpers: verify that existing components are automatically migrated when something is enabled" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 
 	run bash-it enable plugin "node"
@@ -581,9 +581,9 @@ function __migrate_all_components() {
 }
 
 @test "helpers: verify that existing components are automatically migrated when something is disabled" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
-	ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
 
 	run bash-it disable plugin "node"
@@ -627,10 +627,10 @@ function __migrate_all_components() {
 
 @test "helpers: disable all plugins in the old directory structure" {
 	local enabled enabled2
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 
-	ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/node.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/node.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/node.plugin.bash"
 
 	enabled=$(find "${BASH_IT?}/plugins/enabled" -name '*.plugin.bash' | wc -l | xargs)
@@ -647,10 +647,10 @@ function __migrate_all_components() {
 
 @test "helpers: disable all plugins in the old directory structure with priority" {
 	local enabled enabled2
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/250---nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/250---nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/250---nvm.plugin.bash"
 
-	ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/node.plugin.bash" "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/250---node.plugin.bash"
 
 	enabled=$(find "${BASH_IT?}/plugins/enabled" -name '*.plugin.bash' | wc -l | xargs)
@@ -698,14 +698,14 @@ function __migrate_all_components() {
 }
 
 @test "helpers: describe the nvm plugin after enabling it in the old directory" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/nvm.plugin.bash"
 
 	_bash-it-plugins | grep "nvm" | grep "\[x\]"
 }
 
 @test "helpers: describe the nvm plugin after enabling it in the old directory with priority" {
-	ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
+	run ln -s "${BASH_IT?}/plugins/available/nvm.plugin.bash" "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 	assert_link_exist "${BASH_IT?}/plugins/enabled/225---nvm.plugin.bash"
 
 	_bash-it-plugins | grep "nvm" | grep "\[x\]"
diff --git a/test/plugins/base.plugin.bats b/test/plugins/base.plugin.bats
index b45ae07999..7398212494 100644
--- a/test/plugins/base.plugin.bats
+++ b/test/plugins/base.plugin.bats
@@ -8,10 +8,14 @@ function local_setup_file() {
 }
 
 @test 'plugins base: ips()' {
-	readonly localhost='127.0.0.1'
+	if [[ -n "${CI:-}" ]]; then
+		skip 'ifconfig probably requires sudo on TravisCI'
+	fi
+
+	declare -r localhost='127.0.0.1'
 	run ips
 	assert_success
-	assert_line "$localhost"
+	assert_line $localhost
 }
 
 @test 'plugins base: myip()' {