diff --git a/Library/Homebrew/test/abstract_command_spec.rb b/Library/Homebrew/test/abstract_command_spec.rb
index 527a78e0b7..a30080bd89 100644
--- a/Library/Homebrew/test/abstract_command_spec.rb
+++ b/Library/Homebrew/test/abstract_command_spec.rb
@@ -61,7 +61,7 @@ RSpec.describe Homebrew::AbstractCommand do
       ["cmd", "dev-cmd"].each do |dir|
         Dir[File.join(__dir__, "../#{dir}", "*.rb")].each { require(_1) }
       end
-      test_classes = ["Cat", "Tac"]
+      test_classes = ["TestCat", "Tac"]
 
       described_class.subclasses.each do |klass|
         next if test_classes.include?(klass.name)