diff --git a/themes/modern-t/modern-t.theme.bash b/themes/modern-t/modern-t.theme.bash
index eed15a94de..644332364e 100644
--- a/themes/modern-t/modern-t.theme.bash
+++ b/themes/modern-t/modern-t.theme.bash
@@ -29,7 +29,7 @@ esac
 PS3=">> "
 
 is_vim_shell() {
-	if [ ! -z "$VIMRUNTIME" ]; then
+	if [ -n "$VIMRUNTIME" ]; then
 		echo "[${cyan?}vim shell${normal?}]"
 	fi
 }
diff --git a/themes/powerturk/powerturk.theme.bash b/themes/powerturk/powerturk.theme.bash
index 01be0f19b2..e61abfb6e7 100644
--- a/themes/powerturk/powerturk.theme.bash
+++ b/themes/powerturk/powerturk.theme.bash
@@ -41,6 +41,7 @@ _collapsed_wd() {
 		| sed -re "s/\//  /g"
 }
 
+# shellcheck disable=SC2120
 _swd() {
 	# Adapted from http://stackoverflow.com/a/2951707/1766716
 	begin=""            # The unshortened beginning of the path.