diff --git a/Library/Homebrew/dev-cmd/audit.rb b/Library/Homebrew/dev-cmd/audit.rb
index c90a229f74..b97a79fbc9 100644
--- a/Library/Homebrew/dev-cmd/audit.rb
+++ b/Library/Homebrew/dev-cmd/audit.rb
@@ -331,14 +331,14 @@ module Homebrew
     def audit_license
       if formula.license.present?
         non_standard_licenses = []
-        formula.license.each do |lic|
-          next if @spdx_data["licenses"].any? { |standard_lic| standard_lic["licenseId"] == lic }
+        formula.license.each do |license|
+          next if @spdx_data["licenses"].any? { |spdx| spdx["licenseId"] == license }
 
-          non_standard_licenses << lic
+          non_standard_licenses << license
         end
 
         if non_standard_licenses.present?
-          problem "Formula #{formula.name} contains non standard SPDX license: #{non_standard_licenses}."
+          problem "Formula #{formula.name} contains non-standard SPDX licenses: #{non_standard_licenses}."
         end
 
         return unless @online
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index bd87da7562..ab4734cf57 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -2215,7 +2215,7 @@ class Formula
       if args.nil?
         @licenses
       else
-        @licenses = Array(args) unless args == ""
+        @licenses = Array(args)
       end
     end
 
diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index 7d7938a8fb..a288fa5f3e 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -1131,7 +1131,7 @@ class FormulaInstaller
     end
     return if @only_deps
 
-    return unless formula.license.all? { |lic| forbidden_licenses.include? lic }
+    return unless formula.license.all? { |license| forbidden_licenses.include? license }
 
     raise CannotInstallFormulaError, <<~EOS
       #{formula.name}'s licenses are all forbidden: #{formula.license}.