diff --git a/completion/awscli.completion.sh b/completion/awscli.completion.sh
index 530bdd2..e144cf1 100644
--- a/completion/awscli.completion.sh
+++ b/completion/awscli.completion.sh
@@ -1 +1 @@
-[[ -x "$(which aws_completer)" ]] && complete -C "$(which aws_completer)" aws
+[[ -x "$(which aws_completer)" ]] &>/dev/null && complete -C "$(which aws_completer)" aws
diff --git a/completion/conda.completion.sh b/completion/conda.completion.sh
index f43889f..e835dfe 100644
--- a/completion/conda.completion.sh
+++ b/completion/conda.completion.sh
@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
-which register-python-argcomplete > /dev/null \
+which register-python-argcomplete &> /dev/null \
   && eval "$(register-python-argcomplete conda)" \
   || echo "Please install argcomplete to use conda completion" > /dev/null
diff --git a/completion/jungle.completion.sh b/completion/jungle.completion.sh
index 351da28..c7a92b4 100644
--- a/completion/jungle.completion.sh
+++ b/completion/jungle.completion.sh
@@ -1 +1 @@
-[[ -x "$(which jungle)" ]] && eval "$(_JUNGLE_COMPLETE=source jungle)"
+[[ -x "$(which jungle)" ]] &>/dev/null  && eval "$(_JUNGLE_COMPLETE=source jungle)"
diff --git a/completion/kontena.completion.sh b/completion/kontena.completion.sh
index a1d24b3..6626b02 100644
--- a/completion/kontena.completion.sh
+++ b/completion/kontena.completion.sh
@@ -1 +1 @@
-which kontena > /dev/null && . "$( kontena whoami --bash-completion-path )"
+which kontena &> /dev/null && . "$( kontena whoami --bash-completion-path )"