diff --git a/Library/Homebrew/extend/os/mac/hardware/cpu.rb b/Library/Homebrew/extend/os/mac/hardware/cpu.rb
index 47d5096b71..cd8adb0ebb 100644
--- a/Library/Homebrew/extend/os/mac/hardware/cpu.rb
+++ b/Library/Homebrew/extend/os/mac/hardware/cpu.rb
@@ -116,6 +116,8 @@ module Hardware
         when 0x72015832             # ARMv8.6-A (M3 Max, Palma)
           :arm_palma
         else
+          # When adding new ARM CPU families, please also update
+          # test/hardware/cpu_spec.rb to include the new families.
           :dunno
         end
       end
diff --git a/Library/Homebrew/test/hardware/cpu_spec.rb b/Library/Homebrew/test/hardware/cpu_spec.rb
index c3cacad5cb..0c971eb9de 100644
--- a/Library/Homebrew/test/hardware/cpu_spec.rb
+++ b/Library/Homebrew/test/hardware/cpu_spec.rb
@@ -28,11 +28,13 @@ describe Hardware::CPU do
         :amd_k12,
         :arm,
         :arm_blizzard_avalanche,
-        :arm_everest_sawtooth,
         :arm_firestorm_icestorm,
         :arm_hurricane_zephyr,
+        :arm_ibiza,
         :arm_lightning_thunder,
+        :arm_lobos,
         :arm_monsoon_mistral,
+        :arm_palma,
         :arm_twister,
         :arm_typhoon,
         :arm_vortex_tempest,