diff --git a/app/models/spree/variant.rb b/app/models/spree/variant.rb
index 1d8dda53ff..d91498e310 100644
--- a/app/models/spree/variant.rb
+++ b/app/models/spree/variant.rb
@@ -69,7 +69,7 @@ module Spree
       %w(weight volume).include?(variant.product&.variant_unit)
     }
 
-    validates :unit_value, numericality: { greater_than: 0 }
+    validates :unit_value, numericality: { greater_than: 0 }, allow_blank: true
     validates :price, numericality: { greater_than_or_equal_to: 0 }
 
     validates :unit_description, presence: true, if: ->(variant) {
diff --git a/spec/system/admin/bulk_product_update_spec.rb b/spec/system/admin/bulk_product_update_spec.rb
index 199c8e218f..a15d7621b4 100644
--- a/spec/system/admin/bulk_product_update_spec.rb
+++ b/spec/system/admin/bulk_product_update_spec.rb
@@ -307,7 +307,7 @@ describe '
 
         click_button 'Save Changes', match: :first
         expect(page.find("#status-message"))
-          .to have_content "Variant unit value can't be blank Variant unit value is not a number"
+          .to have_content "Variant unit value can't be blank"
       end
 
       it "creating a variant with unit value is: '120g' and 'on_demand' checked" do
@@ -323,7 +323,7 @@ describe '
 
         click_button 'Save Changes', match: :first
         expect(page.find("#status-message"))
-          .to have_content "Variant unit value can't be blank Variant unit value is not a number"
+          .to have_content "Variant unit value can't be blank"
       end
     end
   end