diff --git a/tests/checks/tmux-complete3.fish b/tests/checks/tmux-complete3.fish
index 0b6964fab..40bfee4cc 100644
--- a/tests/checks/tmux-complete3.fish
+++ b/tests/checks/tmux-complete3.fish
@@ -15,5 +15,6 @@ isolated-tmux capture-pane -p
 # But not if the completion pager wasn't empty.
 mkdir somedirectory2 somedirectory3
 isolated-tmux send-keys Tab
+tmux-sleep
 isolated-tmux capture-pane -p
 # CHECK: prompt 0> : somedirectory/