diff --git a/lib/graphql/execution/input_values.rb b/lib/graphql/execution/input_values.rb
index ca6438cd57..133fa0bf91 100644
--- a/lib/graphql/execution/input_values.rb
+++ b/lib/graphql/execution/input_values.rb
@@ -45,10 +45,12 @@ def argument_values(owner_defn, argument_nodes, field_resolve_step)
           arg_node = argument_nodes.find { |a| a.name == arg_graphql_key }
           if arg_node.nil? || (arg_node.value.is_a?(Language::Nodes::VariableIdentifier) && !variable_values.key?(arg_node.value.name))
             if argument_definition.default_value?
-              argument_value(argument_values, arg_ruby_key, argument_definition, argument_definition.default_value, nil, field_resolve_step)
+              arg_value = value_from_ast(argument_definition.default_value, argument_definition.type)
+              argument_value(argument_values, arg_ruby_key, argument_definition, arg_value, nil, field_resolve_step)
             end
           else
-            argument_value(argument_values, arg_ruby_key, argument_definition, arg_node.value, nil, field_resolve_step)
+            arg_value = value_from_ast(arg_node.value, argument_definition.type)
+            argument_value(argument_values, arg_ruby_key, argument_definition, arg_value, nil, field_resolve_step)
           end
         end
 
@@ -110,8 +112,6 @@ def argument_value(argument_values, argument_key, argument_definition, arg_value
           treat_as_type = treat_as_type.of_type
         end
 
-        arg_value = value_from_ast(arg_value, treat_as_type)
-
         if treat_as_type.kind.list? && !arg_value.nil?
           inner_t = treat_as_type.unwrap
           arg_value = if arg_value.is_a?(Array)
@@ -125,14 +125,6 @@ def argument_value(argument_values, argument_key, argument_definition, arg_value
           end
         end
 
-        if override_type.nil? # only on root arguments, not list elements
-          arg_value = begin
-            argument_definition.prepare_value(nil, arg_value, context: @query.context)
-          rescue StandardError => err
-            @runner.schema.handle_or_reraise(@query.context, err)
-          end
-        end
-
         if arg_value && treat_as_type.kind.input_object?
           arg_defns = @query.types.arguments(treat_as_type)
           new_arg_value = {}
@@ -151,7 +143,15 @@ def argument_value(argument_values, argument_key, argument_definition, arg_value
               end
             end
           end
-          arg_value = new_arg_value
+          arg_value = treat_as_type.new(nil, ruby_kwargs: new_arg_value, context: @query.context, defaults_used: nil)
+        end
+
+        if override_type.nil? # only on root arguments, not list elements
+          arg_value = begin
+            argument_definition.prepare_value(nil, arg_value, context: @query.context)
+          rescue StandardError => err
+            @runner.schema.handle_or_reraise(@query.context, err)
+          end
         end
 
         if field_resolve_step && arg_value && override_type.nil? && argument_definition.loads
diff --git a/lib/graphql/schema/argument.rb b/lib/graphql/schema/argument.rb
index eb0879ee24..239ce4dc51 100644
--- a/lib/graphql/schema/argument.rb
+++ b/lib/graphql/schema/argument.rb
@@ -426,9 +426,6 @@ def recursively_prepare_input_object(value, type, context)
         elsif value.is_a?(GraphQL::Schema::InputObject)
           value.validate_for(context)
           value.prepare
-        elsif value.is_a?(Hash)
-          type.validate_for(value, context)
-          value
         else
           value
         end
diff --git a/lib/graphql/schema/input_object.rb b/lib/graphql/schema/input_object.rb
index 7af9b3cecd..05420201b4 100644
--- a/lib/graphql/schema/input_object.rb
+++ b/lib/graphql/schema/input_object.rb
@@ -112,12 +112,6 @@ def validate_for(context)
         nil
       end
 
-      # @api private
-      def self.validate_for(ruby_style_hash, context)
-        # Pass this object's class with `as` so that messages are rendered correctly from inherited validators
-        Schema::Validator.validate!(validators, nil, context, ruby_style_hash, as: self)
-        nil
-      end
       class << self
         def authorized?(obj, value, ctx)
           # Authorize each argument (but this doesn't apply if `prepare` is implemented):
diff --git a/spec/graphql/execution/input_values_spec.rb b/spec/graphql/execution/input_values_spec.rb
index 7b26cf9281..6abbb98c66 100644
--- a/spec/graphql/execution/input_values_spec.rb
+++ b/spec/graphql/execution/input_values_spec.rb
@@ -2,37 +2,41 @@
 require "spec_helper"
 
 class ExecutionInputValuesTest < Minitest::Test
-  TEST_SCHEMA = GraphQL::Schema.from_definition(%|
-    enum TestStatus {
-      ACTIVE
-      INACTIVE
-    }
+  class TestSchema < GraphQL::Schema
+    class TestStatus < GraphQL::Schema::Enum
+      value :ACTIVE
+      value :INACTIVE
+    end
 
-    input TestInput {
-      string: String
-      float: Float
-      int: Int
-      enum: TestStatus
-    }
+    class TestInput < GraphQL::Schema::InputObject
+      argument :string, String, required: false
+      argument :float, Float, required: false
+      argument :int, Int, required: false
+      argument :enum, TestStatus, required: false
+    end
 
-    type Mutation {
-      testInput(input: TestInput): Boolean
-    }
+    class Mutation < GraphQL::Schema::Object
+      field :test_input, Boolean do
+        argument :input, TestInput, required: false
+      end
 
-    type Query {
-      ping: Boolean
-    }
-  |)
+      field :test_list_input, Boolean do
+        argument :input, [TestInput, null: true], required: false
+      end
+    end
 
+    mutation(Mutation)
+    query(Mutation) # Just to have something
+  end
 
   class DummyRunner
     def add_step(s); end
-    def schema; TEST_SCHEMA; end
+    def schema; TestSchema; end
   end
 
-  def get_input_values(variables_string: nil, variables: nil)
-    query_str = "query#{variables_string ? "(#{variables_string})" : ""} { __typename }"
-    query = GraphQL::Query.new(TEST_SCHEMA, query_str, validate: false, variables: variables)
+  def get_input_values(query_string: nil, variables_string: nil, variables: nil)
+    query_string ||= "query#{variables_string ? "(#{variables_string})" : ""} { __typename }"
+    query = GraphQL::Query.new(TestSchema, query_string, validate: false, variables: variables)
     GraphQL::Execution::InputValues.new(query, DummyRunner.new)
   end
 
@@ -67,6 +71,38 @@ def test_it_produces_argument_values_for_simple_scalars
 
   def test_it_produces_argument_values_for_input_objects
     input = get_input_values
-    assert_equal({input: { string: "a", enum: "ACTIVE" } }, input.argument_values(TEST_SCHEMA.find("Mutation.testInput"), get_argument_nodes("input: { string: \"a\", enum: ACTIVE }"), nil))
+    assert_equal_input( {input: { string: "a", enum: "ACTIVE" } }, input.argument_values(TestSchema.find("Mutation.testInput"), get_argument_nodes("input: { string: \"a\", enum: ACTIVE }"), nil))
+  end
+
+  def assert_equal_input(expected_ruby_hash, graphql_input, path = [])
+    case expected_ruby_hash
+    when Array
+      assert_instance_of Array, graphql_input, "Matches at `#{path.join(".")}`"
+      expected_ruby_hash.each_with_index do |next_expected, idx|
+        assert_equal_input(next_expected, graphql_input[idx], path + [idx])
+      end
+    when Hash
+      if path.empty?
+        assert_instance_of Hash, graphql_input, "Matches at `#{path.join(".")}`"
+      else
+        assert_kind_of GraphQL::Schema::InputObject, graphql_input, "Matches at `#{path.join(".")}`"
+        graphql_input = graphql_input.to_h
+      end
+      expected_ruby_hash.each do |k, v|
+        assert_equal_input(v, graphql_input[k], path + [k])
+      end
+    else
+      assert_equal expected_ruby_hash, graphql_input, "Matches at `#{path.join(".")}`"
+    end
+  end
+
+  def test_it_works_with_arrays_of_input_objects
+    input = get_input_values(variables_string: "$string: String = \"abc\", $string2: String, $input: TestInput!", variables: { string2: "xyz", input: { string: "nested" }})
+    assert_equal_input({input: [{}]}, input.argument_values(TestSchema.find("Mutation.testListInput"), get_argument_nodes("input: { string: $s }"), nil))
+    assert_equal_input({input: [{ string: "Str" }]}, input.argument_values(TestSchema.find("Mutation.testListInput"), get_argument_nodes("input: { string: \"Str\" }"), nil))
+    assert_equal_input({input: [{ string: "abc" }]}, input.argument_values(TestSchema.find("Mutation.testListInput"), get_argument_nodes("input: { string: $string }"), nil))
+    assert_equal_input({input: [{ string: "xyz" }]}, input.argument_values(TestSchema.find("Mutation.testListInput"), get_argument_nodes("input: { string: $string2 }"), nil))
+    assert_equal_input({input: [{ string: "nested" }]}, input.argument_values(TestSchema.find("Mutation.testListInput"), get_argument_nodes("input: $input"), nil))
+    assert_equal_input({input: [{}, {string: "Str"}, {string: "abc"}, {string: "xyz"}, {string: "nested"}]}, input.argument_values(TestSchema.find("Mutation.testListInput"), get_argument_nodes("input: [{string: $s}, {string: \"Str\"}, {string: $string }, { string: $string2 }, $input]"), nil))
   end
 end