diff --git a/plugins/available/node.plugin.bash b/plugins/available/node.plugin.bash
index f0467cef..597875ee 100644
--- a/plugins/available/node.plugin.bash
+++ b/plugins/available/node.plugin.bash
@@ -4,4 +4,4 @@ about-plugin 'Node.js helper functions'
 pathmunge ./node_modules/.bin
 
 # Make sure the global npm prefix is on the path
-[[ `which npm` ]] && pathmunge $(npm config get prefix)/bin
+[[ `which npm 2>/dev/null` ]] && pathmunge $(npm config get prefix)/bin
diff --git a/plugins/available/pyenv.plugin.bash b/plugins/available/pyenv.plugin.bash
index dced31a8..4d8db4fb 100644
--- a/plugins/available/pyenv.plugin.bash
+++ b/plugins/available/pyenv.plugin.bash
@@ -4,7 +4,7 @@ about-plugin 'load pyenv, if you are using it'
 export PYENV_ROOT="$HOME/.pyenv"
 pathmunge "$PYENV_ROOT/bin"
 
-[[ `which pyenv` ]] && eval "$(pyenv init - bash)"
+[[ `which pyenv 2>/dev/null` ]] && eval "$(pyenv init - bash)"
 
 #Load pyenv virtualenv if the virtualenv plugin is installed.
 if pyenv virtualenv-init - &> /dev/null; then
diff --git a/plugins/available/rbenv.plugin.bash b/plugins/available/rbenv.plugin.bash
index ecba0c89..2b01669d 100644
--- a/plugins/available/rbenv.plugin.bash
+++ b/plugins/available/rbenv.plugin.bash
@@ -4,4 +4,4 @@ about-plugin 'load rbenv, if you are using it'
 export RBENV_ROOT="$HOME/.rbenv"
 pathmunge "$RBENV_ROOT/bin"
 
-[[ `which rbenv` ]] && eval "$(rbenv init - bash)"
+[[ `which rbenv 2>/dev/null` ]] && eval "$(rbenv init - bash)"