diff --git a/modules/git/functions/git-commit-lost b/modules/git/functions/git-commit-lost
index 671e1e7..b327ec7 100644
--- a/modules/git/functions/git-commit-lost
+++ b/modules/git/functions/git-commit-lost
@@ -1,4 +1,4 @@
-if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+if ! command git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   print "${0}: not a repository work tree: ${PWD}" >&2
   return 1
 fi
diff --git a/modules/git/functions/git-stash-clear-interactive b/modules/git/functions/git-stash-clear-interactive
index 0197be9..1342364 100644
--- a/modules/git/functions/git-stash-clear-interactive
+++ b/modules/git/functions/git-stash-clear-interactive
@@ -1,4 +1,4 @@
-if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+if ! command git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   print "${0}: not a repository work tree: ${PWD}" >&2
   return 1
 fi
diff --git a/modules/git/functions/git-stash-dropped b/modules/git/functions/git-stash-dropped
index 1cc979b..2190d05 100644
--- a/modules/git/functions/git-stash-dropped
+++ b/modules/git/functions/git-stash-dropped
@@ -1,4 +1,4 @@
-if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+if ! command git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   print "${0}: not a repository work tree: ${PWD}" >&2
   return 1
 fi
diff --git a/modules/git/functions/git-stash-recover b/modules/git/functions/git-stash-recover
index 8b5adec..cdfbc2f 100644
--- a/modules/git/functions/git-stash-recover
+++ b/modules/git/functions/git-stash-recover
@@ -1,4 +1,4 @@
-if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+if ! command git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   print "${0}: not a repository work tree: ${PWD}" >&2
   return 1
 fi
diff --git a/modules/git/functions/git-submodule-move b/modules/git/functions/git-submodule-move
index 2f7132c..0596785 100644
--- a/modules/git/functions/git-submodule-move
+++ b/modules/git/functions/git-submodule-move
@@ -1,4 +1,4 @@
-if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+if ! command git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   print "${0}: not a repository work tree: ${PWD}" >&2
   return 1
 elif [[ "${PWD}" != "$(git-root)" ]]; then
diff --git a/modules/git/functions/git-submodule-remove b/modules/git/functions/git-submodule-remove
index 033d39a..aa4c852 100644
--- a/modules/git/functions/git-submodule-remove
+++ b/modules/git/functions/git-submodule-remove
@@ -1,4 +1,4 @@
-if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
+if ! command git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
   print "${0}: not a repository work tree: ${PWD}" >&2
   return 1
 elif [[ "${PWD}" != "$(git-root)" ]]; then