diff --git a/test/system/units_test.rb b/test/system/units_test.rb
index 55c0b7b..bf7ccef 100644
--- a/test/system/units_test.rb
+++ b/test/system/units_test.rb
@@ -35,21 +35,21 @@ class UnitsTest < ApplicationSystemTestCase
     add_link.click
     assert_equal 'disabled', add_link[:disabled]
 
-    params = nil
+    values = nil
     within 'tbody > tr:has(input[type=text], textarea)' do
       assert_selector ':focus'
 
       maxlength = all(:fillable_field).to_h { |f| [f[:name], f[:maxlength].to_i || 2**16] }
-      params = {
+      values = {
         symbol: random_string(rand([1..3, 4..maxlength['unit[symbol]']].sample),
                               except: units.map(&:symbol)),
         description: random_string(rand(0..maxlength['unit[description]']))
       }.with_indifferent_access
       within :field, 'unit[multiplier]' do |field|
-        params[:multiplier] = random_number(field[:max], field[:step])
+        values[:multiplier] = random_number(field[:max], field[:step])
       end if type == :add_subunit
 
-      params.each_pair { |name, value| fill_in "unit[#{name}]", with: value }
+      values.each_pair { |name, value| fill_in "unit[#{name}]", with: value }
 
       assert_difference ->{ Unit.count }, 1 do
         click_on t('helpers.submit.create')
@@ -63,7 +63,7 @@ class UnitsTest < ApplicationSystemTestCase
     assert_no_selector :element, :a, 'disabled': 'disabled',
       exact_text: Regexp.union(LINK_LABELS.fetch_values(:add_unit, :add_subunit))
     assert_selector '.flash.notice', text: t('units.create.success', unit: Unit.last.symbol)
-    assert_equal params, Unit.last.attributes.slice(*params.keys)
+    assert_equal values, Unit.last.attributes.slice(*values.keys)
   end
 
   # TODO: check proper form/button redisplay and flash messages on add/edit