diff --git a/init.zsh b/init.zsh
index 5d7996af..099cab00 100644
--- a/init.zsh
+++ b/init.zsh
@@ -173,7 +173,7 @@ if [[ -s "${ZDOTDIR:-$HOME}/.zpreztorc" ]]; then
 fi
 
 # Disable color and theme in dumb terminals.
-if [[ "$TERM" == 'dumb' ]]; then
+if [[ $TERM == dumb ]]; then
   zstyle ':prezto:*:*' color 'no'
   zstyle ':prezto:module:prompt' theme 'off'
 fi
diff --git a/modules/completion/init.zsh b/modules/completion/init.zsh
index 12cb3336..7f5de862 100644
--- a/modules/completion/init.zsh
+++ b/modules/completion/init.zsh
@@ -7,7 +7,7 @@
 #
 
 # Return if requirements are not found.
-if [[ $TERM == 'dumb' ]]; then
+if [[ $TERM == dumb ]]; then
   return 1
 fi
 
diff --git a/modules/environment/init.zsh b/modules/environment/init.zsh
index 3011f590..9f49c088 100644
--- a/modules/environment/init.zsh
+++ b/modules/environment/init.zsh
@@ -14,7 +14,7 @@
 # paste had a regression. Additionally, 5.2 added bracketed-paste-url-magic
 # which is generally better than url-quote-magic so we load that when possible.
 autoload -Uz is-at-least
-if [[ ${ZSH_VERSION} != 5.1.1 && ${TERM} != "dumb" ]]; then
+if [[ $ZSH_VERSION != 5.1.1 && $TERM != dumb ]]; then
   if is-at-least 5.2; then
     autoload -Uz bracketed-paste-url-magic
     zle -N bracketed-paste bracketed-paste-url-magic
@@ -34,7 +34,8 @@ setopt COMBINING_CHARS      # Combine zero-length punctuation characters (accent
                             # with the base character.
 setopt INTERACTIVE_COMMENTS # Enable comments in interactive shell.
 setopt RC_QUOTES            # Allow 'Henry''s Garage' instead of 'Henry'\''s Garage'.
-unsetopt MAIL_WARNING       # Don't print a warning message if a mail file has been accessed.
+unsetopt MAIL_WARNING       # Don't print a warning message if a mail file has
+                            # been accessed.
 
 # Allow mapping Ctrl+S and Ctrl+Q shortcuts
 [[ -r ${TTY:-} && -w ${TTY:-} && $+commands[stty] == 1 ]] && stty -ixon <$TTY >$TTY
@@ -43,23 +44,23 @@ unsetopt MAIL_WARNING       # Don't print a warning message if a mail file has b
 # Jobs
 #
 
-setopt LONG_LIST_JOBS     # List jobs in the long format by default.
-setopt AUTO_RESUME        # Attempt to resume existing job before creating a new process.
-setopt NOTIFY             # Report status of background jobs immediately.
-unsetopt BG_NICE          # Don't run all background jobs at a lower priority.
-unsetopt HUP              # Don't kill jobs on shell exit.
-unsetopt CHECK_JOBS       # Don't report on jobs when shell exit.
+setopt LONG_LIST_JOBS       # List jobs in the long format by default.
+setopt AUTO_RESUME          # Attempt to resume existing job before creating a new process.
+setopt NOTIFY               # Report status of background jobs immediately.
+unsetopt BG_NICE            # Don't run all background jobs at a lower priority.
+unsetopt HUP                # Don't kill jobs on shell exit.
+unsetopt CHECK_JOBS         # Don't report on jobs when shell exit.
 
 #
 # Termcap
 #
 
 if zstyle -t ':prezto:environment:termcap' color; then
-  export LESS_TERMCAP_mb=$'\E[01;31m'      # Begins blinking.
-  export LESS_TERMCAP_md=$'\E[01;31m'      # Begins bold.
-  export LESS_TERMCAP_me=$'\E[0m'          # Ends mode.
-  export LESS_TERMCAP_se=$'\E[0m'          # Ends standout-mode.
-  export LESS_TERMCAP_so=$'\E[00;47;30m'   # Begins standout-mode.
-  export LESS_TERMCAP_ue=$'\E[0m'          # Ends underline.
-  export LESS_TERMCAP_us=$'\E[01;32m'      # Begins underline.
+  export LESS_TERMCAP_mb=$'\E[01;31m'       # Begins blinking.
+  export LESS_TERMCAP_md=$'\E[01;31m'       # Begins bold.
+  export LESS_TERMCAP_me=$'\E[0m'           # Ends mode.
+  export LESS_TERMCAP_se=$'\E[0m'           # Ends standout-mode.
+  export LESS_TERMCAP_so=$'\E[00;47;30m'    # Begins standout-mode.
+  export LESS_TERMCAP_ue=$'\E[0m'           # Ends underline.
+  export LESS_TERMCAP_us=$'\E[01;32m'       # Begins underline.
 fi
diff --git a/modules/spectrum/init.zsh b/modules/spectrum/init.zsh
index 78beaed4..37b7d7b6 100644
--- a/modules/spectrum/init.zsh
+++ b/modules/spectrum/init.zsh
@@ -7,7 +7,7 @@
 #
 
 # Return if requirements are not found.
-if [[ "$TERM" == 'dumb' ]]; then
+if [[ $TERM == dumb ]]; then
   return 1
 fi
 
diff --git a/modules/terminal/init.zsh b/modules/terminal/init.zsh
index 2a5b9bed..bed0c0d0 100644
--- a/modules/terminal/init.zsh
+++ b/modules/terminal/init.zsh
@@ -7,7 +7,7 @@
 #
 
 # Return if requirements are not found.
-if [[ "$TERM" == (dumb|linux|*bsd*|eterm*) ]]; then
+if [[ $TERM == (dumb|linux|*bsd*|eterm*) ]]; then
   return 1
 fi
 
@@ -60,7 +60,7 @@ function _terminal-set-titles-with-command {
     local truncated_cmd="${cmd/(#m)?(#c15,)/${MATCH[1,12]}...}"
     unset MATCH
 
-    if [[ "$TERM" == screen* ]]; then
+    if [[ $TERM == screen* ]]; then
       set-multiplexer-title "$truncated_cmd"
     fi
     set-tab-title "$truncated_cmd"
@@ -78,7 +78,7 @@ function _terminal-set-titles-with-path {
   local truncated_path="${abbreviated_path/(#m)?(#c15,)/...${MATCH[-12,-1]}}"
   unset MATCH
 
-  if [[ "$TERM" == screen* ]]; then
+  if [[ $TERM == screen* ]]; then
     set-multiplexer-title "$truncated_path"
   fi
   set-tab-title "$truncated_path"
@@ -89,7 +89,7 @@ function _terminal-set-titles-with-path {
 autoload -Uz add-zsh-hook
 
 # Set up the Apple Terminal.
-if [[ "$TERM_PROGRAM" == 'Apple_Terminal' ]] \
+if [[ $TERM_PROGRAM == Apple_Terminal ]] \
   && ( ! [[ -n "$STY" || -n "$TMUX" || -n "$DVTM" ]] )
 then
   # Sets the Terminal.app current working directory before the prompt is
diff --git a/runcoms/zlogout b/runcoms/zlogout
index b5d9858c..3eba9cf7 100644
--- a/runcoms/zlogout
+++ b/runcoms/zlogout
@@ -14,6 +14,6 @@ SAYINGS=(
 )
 
 # Print a randomly-chosen message:
-echo $SAYINGS[$(($RANDOM % ${#SAYINGS} + 1))]
+echo $SAYINGS[$(($RANDOM % $#SAYINGS + 1))]
 
 } >&2