diff --git a/Library/Homebrew/dev-cmd/bump.rb b/Library/Homebrew/dev-cmd/bump.rb
index 0da3372b6a..77d1d37e9d 100644
--- a/Library/Homebrew/dev-cmd/bump.rb
+++ b/Library/Homebrew/dev-cmd/bump.rb
@@ -135,7 +135,10 @@ module Homebrew
 
           if args.repology? && !Utils::Curl.curl_supports_tls13?
             begin
-              ensure_formula_installed!("curl", reason: "Repology queries") unless HOMEBREW_BREWED_CURL_PATH.exist?
+              unless HOMEBREW_BREWED_CURL_PATH.exist?
+                require "formula"
+                ensure_formula_installed!("curl", reason: "Repology queries")
+              end
             rescue FormulaUnavailableError
               opoo "A newer `curl` is required for Repology queries."
             end
diff --git a/Library/Homebrew/extend/kernel.rb b/Library/Homebrew/extend/kernel.rb
index 0b7d12ac9f..90d0988643 100644
--- a/Library/Homebrew/extend/kernel.rb
+++ b/Library/Homebrew/extend/kernel.rb
@@ -441,6 +441,8 @@ module Kernel
 
   # Ensure the given formula is installed
   # This is useful for installing a utility formula (e.g. `shellcheck` for `brew style`)
+  # NOTE: One must `require "formula"` before using this method. Doing `require "formula"` inside the method
+  # doesn't help, and therefore is useless to add.
   sig {
     params(formula_name: String, reason: String, latest: T::Boolean, output_to_stderr: T::Boolean,
            quiet: T::Boolean).returns(Formula)
@@ -460,8 +462,8 @@ module Kernel
       end
     end
 
-    require "formula"
-
+    # Do not `require "formula"` here. It will mask misuse of this method when
+    # it is called without doing `require "formula"` first.
     formula = Formula[formula_name]
     reason = " for #{reason}" if reason.present?
 
@@ -493,6 +495,7 @@ module Kernel
     ].compact.first
     return executable if executable.exist?
 
+    require "formula"
     ensure_formula_installed!(formula_name, reason:, latest:).opt_bin/name
   end
 
diff --git a/Library/Homebrew/style.rb b/Library/Homebrew/style.rb
index eda23c283c..f9049d7fb0 100644
--- a/Library/Homebrew/style.rb
+++ b/Library/Homebrew/style.rb
@@ -321,22 +321,26 @@ module Homebrew
     end
 
     def self.rubocop
+      require "formula"
       ensure_formula_installed!("rubocop", latest: true,
                                            reason: "Ruby style checks").opt_bin/"rubocop"
     end
 
     def self.shellcheck
+      require "formula"
       ensure_formula_installed!("shellcheck", latest: true,
                                               reason: "shell style checks").opt_bin/"shellcheck"
     end
 
     def self.shfmt
+      require "formula"
       ensure_formula_installed!("shfmt", latest: true,
                                          reason: "formatting shell scripts")
       HOMEBREW_LIBRARY/"Homebrew/utils/shfmt.sh"
     end
 
     def self.actionlint
+      require "formula"
       ensure_formula_installed!("actionlint", latest: true,
                                               reason: "GitHub Actions checks").opt_bin/"actionlint"
     end
diff --git a/Library/Homebrew/utils/git.rb b/Library/Homebrew/utils/git.rb
index 994ae07ca2..4eeca69d1d 100644
--- a/Library/Homebrew/utils/git.rb
+++ b/Library/Homebrew/utils/git.rb
@@ -103,6 +103,7 @@ module Utils
           # and will also likely fail due to `OS::Linux` and `OS::Mac` being undefined.
           raise "Refusing to install Git on a generic OS." if ENV["HOMEBREW_TEST_GENERIC_OS"]
 
+          require "formula"
           ensure_formula_installed!("git")
           clear_available_cache
         rescue
diff --git a/Library/Homebrew/utils/pypi.rb b/Library/Homebrew/utils/pypi.rb
index cb3279ad6d..ec3cad9409 100644
--- a/Library/Homebrew/utils/pypi.rb
+++ b/Library/Homebrew/utils/pypi.rb
@@ -152,6 +152,7 @@ module PyPI
         @extras ||= T.let([], T.nilable(T::Array[String]))
         @version ||= T.let(match[2], T.nilable(String))
       elsif @is_url
+        require "formula"
         ensure_formula_installed!(@python_name)
 
         # The URL might be a source distribution hosted somewhere;
@@ -260,6 +261,7 @@ module PyPI
       missing_msg = "formulae required to update \"#{formula.name}\" resources: #{missing_dependencies.join(", ")}"
       odie "Missing #{missing_msg}" unless install_dependencies
       ohai "Installing #{missing_msg}"
+      require "formula"
       missing_dependencies.each(&:ensure_formula_installed!)
     end
 
@@ -334,6 +336,7 @@ module PyPI
       end
     end
 
+    require "formula"
     ensure_formula_installed!(python_name)
 
     # Resolve the dependency tree of all input packages