diff --git a/Library/Homebrew/test/api/internal_tap_json/formula_spec.rb b/Library/Homebrew/test/api/internal_tap_json/formula_spec.rb
index 1426677483..cc03354e23 100644
--- a/Library/Homebrew/test/api/internal_tap_json/formula_spec.rb
+++ b/Library/Homebrew/test/api/internal_tap_json/formula_spec.rb
@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 RSpec.describe "Internal Tap JSON -- Formula" do
+  include FileUtils
+
   let(:internal_tap_json) { File.read(TEST_FIXTURE_DIR/"internal_tap_json/homebrew-core.json").chomp }
   let(:tap_git_head) { "9977471165641744a829d3e494fa563407503297" }
 
diff --git a/Library/Homebrew/test/cmd/deps_spec.rb b/Library/Homebrew/test/cmd/deps_spec.rb
index aa6277196b..e7e19faa01 100644
--- a/Library/Homebrew/test/cmd/deps_spec.rb
+++ b/Library/Homebrew/test/cmd/deps_spec.rb
@@ -3,6 +3,8 @@
 require "cmd/shared_examples/args_parse"
 
 RSpec.describe "brew deps" do
+  include FileUtils
+
   it_behaves_like "parseable arguments"
 
   it "outputs all of a Formula's dependencies and their dependencies on separate lines", :integration_test do
diff --git a/Library/Homebrew/test/cmd/uses_spec.rb b/Library/Homebrew/test/cmd/uses_spec.rb
index 3495adca0a..6c1b864235 100644
--- a/Library/Homebrew/test/cmd/uses_spec.rb
+++ b/Library/Homebrew/test/cmd/uses_spec.rb
@@ -3,6 +3,8 @@
 require "cmd/shared_examples/args_parse"
 
 RSpec.describe "brew uses" do
+  include FileUtils
+
   it_behaves_like "parseable arguments"
 
   it "prints the Formulae a given Formula is used by", :integration_test do
diff --git a/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb b/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb
index 422c9ea485..8850c1cb98 100644
--- a/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/pr-pull_spec.rb
@@ -6,6 +6,8 @@ require "tap"
 require "cmd/shared_examples/args_parse"
 
 RSpec.describe Homebrew::DevCmd::PrPull do
+  include FileUtils
+
   let(:pr_pull) { described_class.new(["foo"]) }
   let(:formula_rebuild) do
     <<~EOS
diff --git a/Library/Homebrew/test/formula_auditor_spec.rb b/Library/Homebrew/test/formula_auditor_spec.rb
index 1270a266c2..f25a1920e2 100644
--- a/Library/Homebrew/test/formula_auditor_spec.rb
+++ b/Library/Homebrew/test/formula_auditor_spec.rb
@@ -3,6 +3,8 @@
 require "formula_auditor"
 
 RSpec.describe Homebrew::FormulaAuditor do
+  include FileUtils
+
   let(:dir) { mktmpdir }
   let(:foo_version) do
     @count ||= 0
diff --git a/Library/Homebrew/test/keg_spec.rb b/Library/Homebrew/test/keg_spec.rb
index 5231fe619f..d7f6d804b6 100644
--- a/Library/Homebrew/test/keg_spec.rb
+++ b/Library/Homebrew/test/keg_spec.rb
@@ -4,6 +4,8 @@ require "keg"
 require "stringio"
 
 RSpec.describe Keg do
+  include FileUtils
+
   def setup_test_keg(name, version)
     path = HOMEBREW_CELLAR/name/version
     (path/"bin").mkpath
diff --git a/Library/Homebrew/test/spec_helper.rb b/Library/Homebrew/test/spec_helper.rb
index f6ce098f5d..141bee02f7 100644
--- a/Library/Homebrew/test/spec_helper.rb
+++ b/Library/Homebrew/test/spec_helper.rb
@@ -128,8 +128,6 @@ RSpec.configure do |config|
   # Never truncate output objects.
   RSpec::Support::ObjectFormatter.default_instance.max_formatted_output_length = nil
 
-  config.include(FileUtils)
-
   config.include(RuboCop::RSpec::ExpectOffense)
 
   config.include(Test::Helper::Cask)
diff --git a/Library/Homebrew/test/tap_spec.rb b/Library/Homebrew/test/tap_spec.rb
index ecfa2b8996..2a87f189df 100644
--- a/Library/Homebrew/test/tap_spec.rb
+++ b/Library/Homebrew/test/tap_spec.rb
@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 RSpec.describe Tap do
+  include FileUtils
+
   alias_matcher :have_formula_file, :be_formula_file
   alias_matcher :have_custom_remote, :be_custom_remote
 
diff --git a/Library/Homebrew/test/utils/gzip_spec.rb b/Library/Homebrew/test/utils/gzip_spec.rb
index 59540a1675..4679a15e1e 100644
--- a/Library/Homebrew/test/utils/gzip_spec.rb
+++ b/Library/Homebrew/test/utils/gzip_spec.rb
@@ -3,6 +3,8 @@
 require "utils/gzip"
 
 RSpec.describe Utils::Gzip do
+  include FileUtils
+
   describe "compress_with_options" do
     it "uses the explicitly specified mtime, orig_name, and output path when passed" do
       mktmpdir do |path|