diff --git a/Library/Homebrew/api/formula.rb b/Library/Homebrew/api/formula.rb
index 388c52cfab..42b3049bbf 100644
--- a/Library/Homebrew/api/formula.rb
+++ b/Library/Homebrew/api/formula.rb
@@ -171,7 +171,7 @@ module Homebrew
           files = hash.dig("bottle", "stable", "files") || {}
           files.map do |tag, bottle_spec|
             {
-              cellar: Formulary.convert_to_string_or_symbol(bottle_spec.fetch("cellar")),
+              cellar: Utils.convert_to_string_or_symbol(bottle_spec.fetch("cellar")),
               tag.to_sym => bottle_spec.fetch("sha256"),
             }
           end
@@ -214,7 +214,7 @@ module Homebrew
         end
 
         if (keg_only_hash = hash["keg_only_reason"])
-          reason = Formulary.convert_to_string_or_symbol(keg_only_hash.fetch("reason"))
+          reason = Utils.convert_to_string_or_symbol(keg_only_hash.fetch("reason"))
           explanation = keg_only_hash["explanation"]
           hash["keg_only_args"] = [reason, explanation].compact
         end
diff --git a/Library/Homebrew/formulary.rb b/Library/Homebrew/formulary.rb
index 6a350b1637..9d4841a9a5 100644
--- a/Library/Homebrew/formulary.rb
+++ b/Library/Homebrew/formulary.rb
@@ -467,13 +467,6 @@ module Formulary
     class_name
   end
 
-  sig { params(string: String).returns(T.any(String, Symbol)) }
-  def self.convert_to_string_or_symbol(string)
-    return T.must(string[1..]).to_sym if string.start_with?(":")
-
-    string
-  end
-
   # A {FormulaLoader} returns instances of formulae.
   # Subclasses implement loaders for particular sources of formulae.
   class FormulaLoader
diff --git a/Library/Homebrew/test/formulary_spec.rb b/Library/Homebrew/test/formulary_spec.rb
index 737b18f54a..97267f9e1e 100644
--- a/Library/Homebrew/test/formulary_spec.rb
+++ b/Library/Homebrew/test/formulary_spec.rb
@@ -748,16 +748,6 @@ RSpec.describe Formulary do
     end
   end
 
-  describe "::convert_to_string_or_symbol" do
-    it "returns the original string if it doesn't start with a colon" do
-      expect(described_class.convert_to_string_or_symbol("foo")).to eq "foo"
-    end
-
-    it "returns a symbol if the original string starts with a colon" do
-      expect(described_class.convert_to_string_or_symbol(":foo")).to eq :foo
-    end
-  end
-
   describe "::loader_for" do
     context "when given a relative path with two slashes" do
       it "returns a `FromPathLoader`" do
diff --git a/Library/Homebrew/test/utils_spec.rb b/Library/Homebrew/test/utils_spec.rb
index 466ef342d7..16ffbf0aed 100644
--- a/Library/Homebrew/test/utils_spec.rb
+++ b/Library/Homebrew/test/utils_spec.rb
@@ -117,4 +117,11 @@ RSpec.describe Utils do
       end
     end
   end
+
+  describe ".convert_to_string_or_symbol" do
+    specify(:aggregate_failures) do
+      expect(described_class.convert_to_string_or_symbol(":example")).to eq(:example)
+      expect(described_class.convert_to_string_or_symbol("example")).to eq("example")
+    end
+  end
 end
diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index 94acc69acb..05423b7b50 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -220,4 +220,16 @@ module Utils
   def self.safe_filename(basename)
     basename.gsub(SAFE_FILENAME_REGEX, "")
   end
+
+  # Converts a string starting with `:` to a symbol, otherwise returns the
+  # string itself.
+  #
+  #   convert_to_string_or_symbol(":example") # => :example
+  #   convert_to_string_or_symbol("example")  # => "example"
+  sig { params(string: String).returns(T.any(String, Symbol)) }
+  def self.convert_to_string_or_symbol(string)
+    return T.must(string[1..]).to_sym if string.start_with?(":")
+
+    string
+  end
 end