1 files changed, 6 insertions, 1 deletions
diff --git a/lib/rubygems/psych_tree.rb b/lib/rubygems/psych_tree.rb
index 6f399a289e..24857adb9d 100644
--- a/lib/rubygems/psych_tree.rb
+++ b/lib/rubygems/psych_tree.rb
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 module Gem
   if defined? ::Psych::Visitors
     class NoAliasYAMLTree < Psych::Visitors::YAMLTree
@@ -7,12 +8,16 @@ module Gem
       end unless respond_to? :create
 
       def visit_String(str)
-        return super unless str == '=' # or whatever you want
+        return super unless str == "=" # or whatever you want
 
         quote = Psych::Nodes::Scalar::SINGLE_QUOTED
         @emitter.scalar str, nil, nil, false, true, quote
       end
 
+      def visit_Hash(o)
+        super(o.compact)
+      end
+
       # Noop this out so there are no anchors
       def register(target, obj)
       end