diff --git a/src/tests/e2e-test b/src/tests/e2e-test
index 1c73bdf..3a9d8c3 100755
--- a/src/tests/e2e-test
+++ b/src/tests/e2e-test
@@ -209,7 +209,7 @@ for run in $server_tests; do
     # XXX tmux 1.8 requires shell command as a single arg; once we move to 2.0, undo these quotes
     # XXX this ignores $TMPDIR, because it results in an overlong pathname on OS X
     tmux_socket="/tmp/.tmux-mosh-test-$$"
-    ${tmux_stdin} tmux -S "${tmux_socket}" -C new-session "${srcdir}/print-exitstatus ${client_wrapper} ${sut} \"${srcdir}/e2e-test-server\" \"${PWD}/${test_dir}/${run}\" \"${PWD}/${test_script} ${testarg}\"" > "${test_dir}/${run}.tmux.log"
+    ${tmux_stdin} tmux -f /dev/null -S "${tmux_socket}" -C new-session "${srcdir}/print-exitstatus ${client_wrapper} ${sut} \"${srcdir}/e2e-test-server\" \"${PWD}/${test_dir}/${run}\" \"${PWD}/${test_script} ${testarg}\"" > "${test_dir}/${run}.tmux.log"
     rv=$?
     rm -f "${tmux_socket}"
     if [ $rv -ne 0 ]; then