diff --git a/Library/Homebrew/abstract_command.rb b/Library/Homebrew/abstract_command.rb
index cf13b3c759..e7a5713755 100644
--- a/Library/Homebrew/abstract_command.rb
+++ b/Library/Homebrew/abstract_command.rb
@@ -17,7 +17,7 @@ module Homebrew
 
     class << self
       sig { returns(String) }
-      def command_name = T.must(name).split("::").fetch(-1).downcase
+      def command_name = Utils.underscore(T.must(name).split("::").fetch(-1)).tr("_", "-")
 
       # @return the AbstractCommand subclass associated with the brew CLI command name.
       sig { params(name: String).returns(T.nilable(T.class_of(AbstractCommand))) }
diff --git a/Library/Homebrew/cli/parser.rb b/Library/Homebrew/cli/parser.rb
index d475d6d418..0f042094b8 100644
--- a/Library/Homebrew/cli/parser.rb
+++ b/Library/Homebrew/cli/parser.rb
@@ -20,7 +20,7 @@ module Homebrew
 
       def self.from_cmd_path(cmd_path)
         cmd_args_method_name = Commands.args_method_name(cmd_path)
-        cmd_name = cmd_args_method_name.to_s.delete_suffix("_args")
+        cmd_name = cmd_args_method_name.to_s.delete_suffix("_args").tr("_", "-")
 
         begin
           if require?(cmd_path)