diff --git a/.github/workflows/mantis-discord-status-reactions.yml b/.github/workflows/mantis-discord-status-reactions.yml
index c16446a8f43..de875f5bcb0 100644
--- a/.github/workflows/mantis-discord-status-reactions.yml
+++ b/.github/workflows/mantis-discord-status-reactions.yml
@@ -271,7 +271,7 @@ jobs:
           go build -C "$install_dir/src" -o "$HOME/.local/bin/crabbox" ./cmd/crabbox
           echo "$HOME/.local/bin" >> "$GITHUB_PATH"
           "$HOME/.local/bin/crabbox" --version
-          "$HOME/.local/bin/crabbox" warmup --help 2>&1 | grep -q -- "--desktop"
+          "$HOME/.local/bin/crabbox" warmup --help 2>&1 | grep -q -- "-desktop"
 
       - name: Prepare baseline and candidate worktrees
         shell: bash