Fix tests

Library/Homebrew/cmd/outdated.rb

@@ -100,7 +100,7 @@ module Homebrew
           elsif f.tap.present?
             f.pkg_version.to_s
           else
-            Utils::BottleAPI.latest_pkg_version(f.name).to_s
+            Utils::BottleAPI.latest_pkg_version(f.name)&.to_s || f.pkg_version.to_s
           end
 
           outdated_versions = outdated_kegs.group_by { |keg| Formulary.from_keg(keg).full_name }

Library/Homebrew/cmd/reinstall.rb

@@ -88,7 +88,7 @@ module Homebrew
       args.named.each do |name|
         formula = Formulary.factory(name)
         next unless formula.any_version_installed?
-        next if formula.tap.present? && !formula.tap.installed?
+        next if formula.tap.present?
         next unless Utils::BottleAPI.bottle_available?(name)
 
         Utils::BottleAPI.fetch_bottles(name)

Library/Homebrew/cmd/upgrade.rb

@@ -161,7 +161,7 @@ module Homebrew
 
     if ENV["HOMEBREW_JSON_CORE"].present? && !CoreTap.instance.installed?
       formulae_to_install.map! do |formula|
-        next formula if formula.tap.present? && formula.tap.installed?
+        next formula if formula.tap.present?
         next formula unless Utils::BottleAPI.bottle_available?(formula.name)
 
         Utils::BottleAPI.fetch_bottles(formula.name)

Library/Homebrew/formula.rb

@@ -1328,7 +1328,7 @@ class Formula
       latest_version = if tap.present?
         pkg_version
       else
-        Utils::BottleAPI.latest_pkg_version name
+        Utils::BottleAPI.latest_pkg_version(name) || pkg_version
       end
 
       installed_kegs.each do |keg|

Library/Homebrew/utils/bottle_api.rb

@@ -46,6 +46,9 @@ module Utils
         output = Utils::Curl.curl_output("--fail", FORMULAE_BREW_SH_VERSIONS_API_URL)
         JSON.parse(output.stdout)
       end
+
+      return unless @formula_versions.key? name
+
       PkgVersion.new(@formula_versions[name]["version"], @formula_versions[name]["revision"])
     end