diff --git a/helper.zsh b/helper.zsh
index cf28d076..dc25281e 100644
--- a/helper.zsh
+++ b/helper.zsh
@@ -4,7 +4,7 @@ function autoloadable() {
 }
 
 # Checks boolean variable for "true" (case insensitive "1", "y", "yes", "t", "true", "o", and "on").
-function check-bool() {
+function is-true() {
   [[ -n "$1" && "$1" == (1|[Yy]([Ee][Ss]|)|[Tt]([Rr][Uu][Ee]|)|[Oo]([Nn]|)) ]]
 }
 
diff --git a/plugins/git/functions/git-info b/plugins/git/functions/git-info
index 0d2f931a..c0854c4a 100644
--- a/plugins/git/functions/git-info
+++ b/plugins/git/functions/git-info
@@ -60,7 +60,7 @@ function _git-action() {
 
 # Turns off git-info for the current repository.
 function _git-info-abort() {
-  if ! check-bool "$_git_info_executing"; then
+  if ! is-true "$_git_info_executing"; then
     return 1
   fi
 
@@ -146,7 +146,7 @@ function git-info() {
   unset git_rprompt_info
 
   # Return if not inside a Git repository work tree.
-  if ! check-bool "$(git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+  if ! is-true "$(git rev-parse --is-inside-work-tree 2> /dev/null)"; then
     return 1
   fi
 
@@ -162,7 +162,7 @@ function git-info() {
   fi
 
   # Return if git-info is disabled.
-  if ! check-bool "${$(git config --bool prompt.showinfo):-true}"; then
+  if ! is-true "${$(git config --bool prompt.showinfo):-true}"; then
     return 1
   fi
 
diff --git a/plugins/screen/init.zsh b/plugins/screen/init.zsh
index 9e45e2c2..e46283b8 100644
--- a/plugins/screen/init.zsh
+++ b/plugins/screen/init.zsh
@@ -11,7 +11,7 @@ alias sn="screen -U -S"
 alias sr="screen -a -A -U -D -R"
 
 # Auto
-if (( $SHLVL == 1 )) && check-bool "$AUTO_SCREEN"; then
+if (( $SHLVL == 1 )) && is-true "$AUTO_SCREEN"; then
   (( SHLVL += 1 )) && export SHLVL
   session="$(screen -list 2> /dev/null | sed '1d;$d' | awk '{print $1}' | head -1)"
   if [[ -n "$session" ]]; then
diff --git a/plugins/ssh-agent/init.zsh b/plugins/ssh-agent/init.zsh
index b92dcd78..3f7a5266 100644
--- a/plugins/ssh-agent/init.zsh
+++ b/plugins/ssh-agent/init.zsh
@@ -40,7 +40,7 @@ function _ssh-agent-start() {
 
 # Test if agent-forwarding is enabled.
 zstyle -b ':omz:plugin:ssh-agent' forwarding '_ssh_agent_forwarding'
-if check-bool "${_ssh_agent_forwarding}" && [[ -n "$SSH_AUTH_SOCK" ]]; then
+if is-true "${_ssh_agent_forwarding}" && [[ -n "$SSH_AUTH_SOCK" ]]; then
   # Add a nifty symlink for screen/tmux if agent forwarding.
   [[ -L "$SSH_AUTH_SOCK" ]] || ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USER-screen
 elif [ -f "${_ssh_agent_env}" ]; then
diff --git a/plugins/tmux/init.zsh b/plugins/tmux/init.zsh
index 3e54acff..8e213358 100644
--- a/plugins/tmux/init.zsh
+++ b/plugins/tmux/init.zsh
@@ -10,7 +10,7 @@ alias ta="tmux attach-session"
 alias tl="tmux list-sessions"
 
 # Auto
-if (( $SHLVL == 1 )) && check-bool "$AUTO_TMUX"; then
+if (( $SHLVL == 1 )) && is-true "$AUTO_TMUX"; then
   (( SHLVL += 1 )) && export SHLVL
   session="$(tmux list-sessions 2> /dev/null | cut -d':' -f1 | head -1)"
   if [[ -n "$session" ]]; then