diff --git a/lib/liquid/standardfilters.rb b/lib/liquid/standardfilters.rb
index daa2c580..7359062e 100644
--- a/lib/liquid/standardfilters.rb
+++ b/lib/liquid/standardfilters.rb
@@ -386,7 +386,6 @@ module Liquid
         end
       elsif ary.all? { |el| el.respond_to?(:[]) }
         begin
-          property = Utils.to_s(property)
           ary.sort { |a, b| nil_safe_compare(a[property], b[property]) }
         rescue TypeError
           raise_property_error(property)
@@ -416,7 +415,6 @@ module Liquid
         end
       elsif ary.all? { |el| el.respond_to?(:[]) }
         begin
-          property = Utils.to_s(property)
           ary.sort { |a, b| nil_safe_casecmp(a[property], b[property]) }
         rescue TypeError
           raise_property_error(property)
@@ -504,7 +502,6 @@ module Liquid
       elsif ary.empty? # The next two cases assume a non-empty array.
         []
       else
-        property = Utils.to_s(property)
         ary.uniq do |item|
           item[property]
         rescue TypeError
@@ -536,11 +533,6 @@ module Liquid
     # @liquid_syntax array | map: string
     # @liquid_return [array[untyped]]
     def map(input, property)
-      property = Utils.to_s(property)
-
-      # Return the input array if property is empty (no-op)
-      return InputIterator.new(input, context).to_a if property.empty?
-
       InputIterator.new(input, context).map do |e|
         e = e.call if e.is_a?(Proc)
 
@@ -570,7 +562,6 @@ module Liquid
       elsif ary.empty? # The next two cases assume a non-empty array.
         []
       else
-        property = Liquid::Utils.to_s(property)
         ary.reject do |item|
           item[property].nil?
         rescue TypeError
@@ -960,8 +951,6 @@ module Liquid
     # @liquid_syntax array | sum
     # @liquid_return [number]
     def sum(input, property = nil)
-      property = property.nil? ? nil : Utils.to_s(property)
-
       ary = InputIterator.new(input, context)
       return 0 if ary.empty?
 
@@ -990,6 +979,7 @@ module Liquid
 
     def filter_array(input, property, target_value, default_value = [], &block)
       ary = InputIterator.new(input, context)
+
       return default_value if ary.empty?
 
       property = Utils.to_s(property)
@@ -1009,7 +999,7 @@ module Liquid
     end
 
     def raise_property_error(property)
-      raise Liquid::ArgumentError, "cannot select the property '#{property}'"
+      raise Liquid::ArgumentError, "cannot select the property '#{Utils.to_s(property)}'"
     end
 
     def apply_operation(input, operand, operation)
diff --git a/lib/liquid/version.rb b/lib/liquid/version.rb
index 854073d0..2eee338a 100644
--- a/lib/liquid/version.rb
+++ b/lib/liquid/version.rb
@@ -2,5 +2,5 @@
 # frozen_string_literal: true
 
 module Liquid
-  VERSION = "5.8.4"
+  VERSION = "5.8.5"
 end
diff --git a/test/integration/standard_filter_test.rb b/test/integration/standard_filter_test.rb
index 6a2737bb..6b931de5 100644
--- a/test/integration/standard_filter_test.rb
+++ b/test/integration/standard_filter_test.rb
@@ -560,26 +560,6 @@ class StandardFiltersTest < Minitest::Test
     end
   end
 
-  def test_map_with_nil_property
-    array = [
-      { "handle" => "alpha", "value" => "A" },
-      { "handle" => "beta", "value" => "B" },
-      { "handle" => "gamma", "value" => "C" }
-    ]
-
-    assert_template_result("alpha beta gamma", "{{ array | map: nil | map: 'handle' | join: ' ' }}", { "array" => array })
-  end
-
-  def test_map_with_empty_string_property
-    array = [
-      { "handle" => "alpha", "value" => "A" },
-      { "handle" => "beta", "value" => "B" },
-      { "handle" => "gamma", "value" => "C" }
-    ]
-
-    assert_template_result("alpha beta gamma", "{{ array | map: '' | map: 'handle' | join: ' ' }}", { "array" => array })
-  end
-
   def test_map_with_value_property
     array = [
       { "handle" => "alpha", "value" => "A" },
@@ -591,16 +571,15 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_map_returns_input_with_no_property
-    input = [
+    foo = [
       [1],
       [2],
       [3],
     ]
-    result = @filters.map(input, nil)
-    assert_equal(input.flatten, result)
 
-    result = @filters.map(input, '')
-    assert_equal(input.flatten, result)
+    assert_raises(Liquid::ArgumentError) do
+      @filters.map(foo, nil)
+    end
   end
 
   def test_sort_works_on_enumerables
@@ -1109,19 +1088,6 @@ class StandardFiltersTest < Minitest::Test
     assert_template_result(expected_output, template, { "array" => array })
   end
 
-  def test_where_with_non_string_property
-    array = [
-      { "handle" => "alpha", "{}" => true },
-      { "handle" => "beta", "{}" => false },
-      { "handle" => "gamma", "{}" => false },
-      { "handle" => "delta", "{}" => true },
-    ]
-    template = "{{ array | where: some_property, true | map: 'handle' | join: ' ' }}"
-    expected_output = "alpha delta"
-
-    assert_template_result(expected_output, template, { "array" => array, "some_property" => {} })
-  end
-
   def test_where_string_keys
     input = [
       "alpha", "beta", "gamma", "delta"
@@ -1330,7 +1296,7 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_sum_with_non_string_property
-    input = [{ "true" => 1 }, { "1.0" => 0.2, "1" => -0.3 }, { "1..5" => 0.4 }]
+    input = [{ true => 1 }, { 1.0 => 0.2, 1 => -0.3 }, { 1..5 => 0.4 }]
 
     assert_equal(1, @filters.sum(input, true))
     assert_equal(0.2, @filters.sum(input, 1.0))