Only spec standard Warning.categories

Author: eregon

core/warning/categories_spec.rb

@@ -2,8 +2,11 @@
 
 ruby_version_is "3.4" do
   describe "Warning.categories" do
+    # There might be more, but these are standard across Ruby implementations
     it "returns the list of possible warning categories" do
-      Warning.categories.sort.should == [:deprecated, :experimental, :performance, :strict_unused_block]
+      Warning.categories.should.include? :deprecated
+      Warning.categories.should.include? :experimental
+      Warning.categories.should.include? :performance
     end
   end
 end