diff --git a/Library/Homebrew/api.rb b/Library/Homebrew/api.rb
index 3e293d5768..4caf17e825 100644
--- a/Library/Homebrew/api.rb
+++ b/Library/Homebrew/api.rb
@@ -40,6 +40,9 @@ module Homebrew
     }
     def self.fetch_json_api_file(endpoint, target: HOMEBREW_CACHE_API/endpoint,
                                  stale_seconds: Homebrew::EnvConfig.api_auto_update_secs.to_i)
+      # Lazy-load dependency.
+      require "development_tools"
+
       retry_count = 0
       url = "#{Homebrew::EnvConfig.api_domain}/#{endpoint}"
       default_url = "#{HOMEBREW_API_DEFAULT_DOMAIN}/#{endpoint}"
diff --git a/Library/Homebrew/downloadable.rb b/Library/Homebrew/downloadable.rb
index 8c03630621..5a1d4dbd02 100644
--- a/Library/Homebrew/downloadable.rb
+++ b/Library/Homebrew/downloadable.rb
@@ -3,6 +3,7 @@
 
 require "url"
 require "checksum"
+require "download_strategy"
 
 class Downloadable
   include Context
diff --git a/Library/Homebrew/tap.rb b/Library/Homebrew/tap.rb
index 941c351e09..97e58ceb99 100644
--- a/Library/Homebrew/tap.rb
+++ b/Library/Homebrew/tap.rb
@@ -1,6 +1,7 @@
 # typed: true
 # frozen_string_literal: true
 
+require "api"
 require "commands"
 require "settings"