diff --git a/tests/checks/tmux-multiline-prompt.fish b/tests/checks/tmux-multiline-prompt.fish
index d2b8435e5..28c61479e 100644
--- a/tests/checks/tmux-multiline-prompt.fish
+++ b/tests/checks/tmux-multiline-prompt.fish
@@ -1,6 +1,6 @@
 #RUN: %fish %s
 #REQUIRES: command -v tmux && ! tmux -V | grep -qE '^tmux (next-3.4|3\.[0123][a-z]*($|[.-]))'
-#REQUIRES: command -v less && ! less --version 2>&1 || grep -q BusyBox
+#REQUIRES: command -v less && ! less --version 2>&1 | grep -q BusyBox
 # Disable on GitHub macOS CI because it fails more than it passes there
 #REQUIRES: uname -s | grep -qv Darwin || test -z "$CI"