diff --git a/test/libexec/tmuxifier-tmux-test.sh b/test/libexec/tmuxifier-tmux-test.sh
new file mode 100755
index 0000000..0ac6f79
--- /dev/null
+++ b/test/libexec/tmuxifier-tmux-test.sh
@@ -0,0 +1,28 @@
+#! /usr/bin/env bash
+source "../test-helper.sh"
+source "${root}/lib/util.sh"
+
+#
+# tmuxifier-tmux tests.
+#
+
+# Setup.
+libexec="${root}/libexec"
+realTMUX="$TMUX"
+unset TMUX
+export TMUXIFIER_TMUX_OPTS="-L tmuxifier-tests"
+tmux $TMUXIFIER_TMUX_OPTS new -d -s foobar
+tmux $TMUXIFIER_TMUX_OPTS new -d -s dude
+
+# Passes all arguments to Tmux.
+assert "${libexec}/tmuxifier-tmux list-sessions -F \"#{session_id}: #S\"" \
+       "\$1: dude\n\$0: foobar"
+
+# Tear down.
+tmux $TMUXIFIER_TMUX_OPTS kill-server
+unset TMUXIFIER_TMUX_OPTS
+TMUX="$realTMUX"
+unset realTMUX
+
+# End of tests.
+assert_end "tmuxifier-tmux"