diff --git a/Brewfile b/Brewfile
index 15977be..c87d4a7 100644
--- a/Brewfile
+++ b/Brewfile
@@ -31,7 +31,7 @@ brew "helm"
 brew "terraform"
 brew "oci-cli"          # Oracle Cloud
 brew "doctl"            # DigitalOcean CLI
-brew "octant"           # Kubernetes dashboard
+brew "k9s"              # Kubernetes cluster dashboard (terminal UI)
 
 # ── Databases ────────────────────────────────────────────────────────────────
 brew "mongosh"          # MongoDB shell
diff --git a/scripts/acceptance-test.sh b/scripts/acceptance-test.sh
index dfe8c76..798b7e8 100755
--- a/scripts/acceptance-test.sh
+++ b/scripts/acceptance-test.sh
@@ -45,6 +45,8 @@ section "Homebrew"
 check "brew is on PATH" "command -v brew"
 check "cirruslabs/cli tap is active" "brew tap | grep -q cirruslabs/cli"
 check "tart is installed" "command -v tart"
+check "no deprecated formulae in Brewfile" \
+  "! brew bundle check --file=\"\$HOME/Repos/amcheste/mac-dev-setup/Brewfile\" 2>&1 | grep -qi deprecated"
 
 # ── Dotfiles ───────────────────────────────────────────────────────────────────