diff --git a/Library/Homebrew/extend/os/linux/cleanup.rb b/Library/Homebrew/extend/os/linux/cleanup.rb
index a9443a3d59..b6cd428fe8 100644
--- a/Library/Homebrew/extend/os/linux/cleanup.rb
+++ b/Library/Homebrew/extend/os/linux/cleanup.rb
@@ -5,6 +5,7 @@ module Homebrew
   class Cleanup
     undef use_system_ruby?
 
+    sig { returns(T::Boolean) }
     def use_system_ruby?
       return false if Homebrew::EnvConfig.force_vendor_ruby?
 
diff --git a/Library/Homebrew/extend/os/mac/cleanup.rb b/Library/Homebrew/extend/os/mac/cleanup.rb
index 6ede0bcd7a..3565e162b4 100644
--- a/Library/Homebrew/extend/os/mac/cleanup.rb
+++ b/Library/Homebrew/extend/os/mac/cleanup.rb
@@ -1,10 +1,11 @@
-# typed: true # rubocop:disable Sorbet/StrictSigil
+# typed: strict
 # frozen_string_literal: true
 
 module Homebrew
   class Cleanup
     undef use_system_ruby?
 
+    sig { returns(T::Boolean) }
     def use_system_ruby?
       return false if Homebrew::EnvConfig.force_vendor_ruby?
 
diff --git a/Library/Homebrew/extend/os/mac/linkage_checker.rb b/Library/Homebrew/extend/os/mac/linkage_checker.rb
index 6c69fd291b..b48d2b90d3 100644
--- a/Library/Homebrew/extend/os/mac/linkage_checker.rb
+++ b/Library/Homebrew/extend/os/mac/linkage_checker.rb
@@ -6,6 +6,7 @@ class LinkageChecker
 
   private
 
+  sig { returns(T::Boolean) }
   def system_libraries_exist_in_cache?
     # In macOS Big Sur and later, system libraries do not exist on-disk and instead exist in a cache.
     MacOS.version >= :big_sur
diff --git a/Library/Homebrew/sorbet/tapioca/compilers/args.rb b/Library/Homebrew/sorbet/tapioca/compilers/args.rb
index 947527d5a5..b59ecaff3d 100644
--- a/Library/Homebrew/sorbet/tapioca/compilers/args.rb
+++ b/Library/Homebrew/sorbet/tapioca/compilers/args.rb
@@ -32,7 +32,7 @@ module Tapioca
       def decorate
         cmd = T.cast(constant, T.class_of(Homebrew::AbstractCommand))
         # This is a dummy class to make the `brew` command parsable
-        return if cmd.name == "Homebrew::Cmd::Brew"
+        return if cmd == Homebrew::Cmd::Brew
 
         args_class_name = T.must(T.must(cmd.args_class).name)
         root.create_class(args_class_name, superclass_name: "Homebrew::CLI::Args") do |klass|