diff --git a/Library/Homebrew/test/rubocops/lines/generate_completions_spec.rb b/Library/Homebrew/test/rubocops/lines/generate_completions_spec.rb
index f927b9cf08..248f95f362 100644
--- a/Library/Homebrew/test/rubocops/lines/generate_completions_spec.rb
+++ b/Library/Homebrew/test/rubocops/lines/generate_completions_spec.rb
@@ -30,6 +30,52 @@ describe RuboCop::Cop::FormulaAudit do
       RUBY
     end
 
+    it "reports an offense when writing to a shell completions file differing from the formula name" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo-cli.rb")
+        class FooCli < Formula
+          name "foo-cli"
+
+          def install
+            (bash_completion/"foo").write Utils.safe_popen_read(bin/"foo", "completions", "bash")
+            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Use `generate_completions_from_executable(bin/"foo", "completions", base_name: "foo", shells: [:bash])` instead of `(bash_completion/"foo").write Utils.safe_popen_read(bin/"foo", "completions", "bash")`.
+          end
+        end
+      RUBY
+
+      expect_correction(<<~RUBY)
+        class FooCli < Formula
+          name "foo-cli"
+
+          def install
+            generate_completions_from_executable(bin/"foo", "completions", base_name: "foo", shells: [:bash])
+          end
+        end
+      RUBY
+    end
+
+    it "reports an offense when writing to a shell completions file using an arg for the shell parameter" do
+      expect_offense(<<~RUBY, "/homebrew-core/Formula/foo.rb")
+        class Foo < Formula
+          name "foo"
+
+          def install
+            (bash_completion/"foo").write Utils.safe_popen_read(bin/"foo", "completions", "--shell=bash")
+            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Use `generate_completions_from_executable(bin/"foo", "completions", shells: [:bash], shell_parameter_format: :arg)` instead of `(bash_completion/"foo").write Utils.safe_popen_read(bin/"foo", "completions", "--shell=bash")`.
+          end
+        end
+      RUBY
+
+      expect_correction(<<~RUBY)
+        class Foo < Formula
+          name "foo"
+
+          def install
+            generate_completions_from_executable(bin/"foo", "completions", shells: [:bash], shell_parameter_format: :arg)
+          end
+        end
+      RUBY
+    end
+
     it "reports an offense when writing to a completions file indirectly" do
       expect_offense(<<~RUBY)
         class Foo < Formula