diff --git a/libexec/sourcezap/commands/sourcezap-checkout b/libexec/sourcezap/commands/sourcezap-checkout
index 9427427..ad5352e 100755
--- a/libexec/sourcezap/commands/sourcezap-checkout
+++ b/libexec/sourcezap/commands/sourcezap-checkout
@@ -21,7 +21,7 @@ if [ "$(id -u)" = "0" ]; then
     exit 1
 fi
 
-if ! "${libexec}"/utils/issourcezap-member > /dev/null 2>&1; then
+if ! "${libexec}"/utils/issourcezap-member; then
     printerr "$(id -un) is not a member of _sourcezap"
     exit 1
 fi
diff --git a/libexec/sourcezap/commands/sourcezap-clone b/libexec/sourcezap/commands/sourcezap-clone
index 0745236..04bf36b 100755
--- a/libexec/sourcezap/commands/sourcezap-clone
+++ b/libexec/sourcezap/commands/sourcezap-clone
@@ -22,7 +22,7 @@ if [ "$(id -u)" = "0" ]; then
     exit 1
 fi
 
-if ! "${libexec}"/utils/issourcezap-member > /dev/null 2>&1; then
+if ! "${libexec}"/utils/issourcezap-member; then
     printerr "$(id -un) is not a member of _sourcezap"
     exit 1
 fi
diff --git a/libexec/sourcezap/commands/sourcezap-pull b/libexec/sourcezap/commands/sourcezap-pull
index 51c527a..c971dd3 100755
--- a/libexec/sourcezap/commands/sourcezap-pull
+++ b/libexec/sourcezap/commands/sourcezap-pull
@@ -20,7 +20,7 @@ if [ "$(id -u)" = "0" ]; then
     exit 1
 fi
 
-if ! "${libexec}"/utils/issourcezap-member > /dev/null 2>&1; then
+if ! "${libexec}"/utils/issourcezap-member; then
     printerr "$(id -un) is not a member of _sourcezap"
     exit 1
 fi
diff --git a/libexec/sourcezap/utils/issourcezap-member b/libexec/sourcezap/utils/issourcezap-member
index 65742b1..54069a3 100755
--- a/libexec/sourcezap/utils/issourcezap-member
+++ b/libexec/sourcezap/utils/issourcezap-member
@@ -5,5 +5,5 @@ set -e
 # main
 group="_sourcezap"
 mygroups=$(id -Gn | tr ' ' '\n')
-echo "${mygroups}" | grep -e "^${group}$"
+echo "${mygroups}" | grep -e "^${group}$" > /dev/null 2>&1
 exit "${?}"