diff --git a/spec/features/admin/budget_investments_spec.rb b/spec/features/admin/budget_investments_spec.rb
index 8a83e4ce4..5195c6c7e 100644
--- a/spec/features/admin/budget_investments_spec.rb
+++ b/spec/features/admin/budget_investments_spec.rb
@@ -88,11 +88,10 @@ describe "Admin budget investments" do
       admin = create(:administrator, user: create(:user, username: "Gema"))
 
       budget_investment1 = create(:budget_investment, budget: budget, valuators: [valuator1])
-      budget_investment2 = create(:budget_investment, budget: budget, valuators: [valuator1, valuator2])
+      budget_investment2 = create(:budget_investment, budget: budget, valuators: [valuator1, valuator2],
+                                  valuator_groups: [valuator_group])
       budget_investment3 = create(:budget_investment, budget: budget)
 
-      budget_investment2.valuator_groups << valuator_group
-
       visit admin_budget_budget_investments_path(budget_id: budget.id)
 
       within("#budget_investment_#{budget_investment1.id}") do
@@ -241,11 +240,8 @@ describe "Admin budget investments" do
       health_group = create(:valuator_group, name: "Health")
       culture_group = create(:valuator_group, name: "Culture")
 
-      budget_investment1 = create(:budget_investment, title: "Build a hospital", budget: budget)
-      budget_investment1.valuator_groups << health_group
-
-      budget_investment2 = create(:budget_investment, title: "Build a theatre", budget: budget)
-      budget_investment2.valuator_groups << culture_group
+      create(:budget_investment, title: "Build a hospital", budget: budget, valuator_groups: [health_group])
+      create(:budget_investment, title: "Build a theatre", budget: budget, valuator_groups: [culture_group])
 
       visit admin_budget_budget_investments_path(budget_id: budget)
       expect(page).to have_link("Build a hospital")
diff --git a/spec/features/valuation/budget_investments_spec.rb b/spec/features/valuation/budget_investments_spec.rb
index e55288940..b8f787c01 100644
--- a/spec/features/valuation/budget_investments_spec.rb
+++ b/spec/features/valuation/budget_investments_spec.rb
@@ -231,7 +231,7 @@ describe "Valuation budget investments" do
       create(:budget_investment, :unfeasible, budget: budget, price: 1234,
                                  unfeasibility_explanation: "It is impossible",
                                  administrator: administrator,
-                                 valuators: [valuator, second_valuator] )
+                                 valuators: [valuator, second_valuator])
     end
 
     scenario "visible for assigned valuators" do
diff --git a/spec/models/abilities/valuator_spec.rb b/spec/models/abilities/valuator_spec.rb
index 1415a030f..379001a25 100644
--- a/spec/models/abilities/valuator_spec.rb
+++ b/spec/models/abilities/valuator_spec.rb
@@ -5,18 +5,13 @@ describe Abilities::Valuator do
   subject(:ability) { Ability.new(user) }
 
   let(:user) { valuator.user }
-  let(:valuator) { create(:valuator) }
   let(:group) { create(:valuator_group) }
+  let(:valuator) { create(:valuator, valuator_group: group) }
   let(:non_assigned_investment) { create(:budget_investment) }
   let(:assigned_investment) { create(:budget_investment, budget: create(:budget, :valuating), valuators: [valuator]) }
-  let(:group_assigned_investment) { create(:budget_investment, budget: create(:budget, :valuating)) }
+  let(:group_assigned_investment) { create(:budget_investment, budget: create(:budget, :valuating), valuator_groups: [group]) }
   let(:finished_assigned_investment) { create(:budget_investment, budget: create(:budget, :finished), valuators: [valuator]) }
 
-  before do
-    group_assigned_investment.valuator_groups << group
-    valuator.update(valuator_group: group)
-  end
-
   it "cannot valuate an assigned investment with a finished valuation" do
     assigned_investment.update(valuation_finished: true)
 
diff --git a/spec/models/budget/investment_spec.rb b/spec/models/budget/investment_spec.rb
index 01d812ea2..960acb9bc 100644
--- a/spec/models/budget/investment_spec.rb
+++ b/spec/models/budget/investment_spec.rb
@@ -439,11 +439,8 @@ describe Budget::Investment do
 
       it "returns all investments with assigned valuator groups but valuation not finished" do
         investment1 = create(:budget_investment)
-        investment2 = create(:budget_investment)
-        investment3 = create(:budget_investment, :finished)
-
-        investment2.valuator_groups << create(:valuator_group)
-        investment3.valuator_groups << create(:valuator_group)
+        investment2 = create(:budget_investment, valuator_groups: [create(:valuator_group)])
+        investment3 = create(:budget_investment, :finished, valuator_groups: [create(:valuator_group)])
 
         valuating = Budget::Investment.valuating
 
diff --git a/spec/models/valuator_spec.rb b/spec/models/valuator_spec.rb
index 3224beaa5..f652757b1 100644
--- a/spec/models/valuator_spec.rb
+++ b/spec/models/valuator_spec.rb
@@ -34,13 +34,10 @@ describe Valuator do
       group = create(:valuator_group)
       valuator = create(:valuator, valuator_group: group)
 
-      investment1 = create(:budget_investment)
-      investment2 = create(:budget_investment)
+      investment1 = create(:budget_investment, valuator_groups: [group])
+      investment2 = create(:budget_investment, valuator_groups: [group])
       investment3 = create(:budget_investment)
 
-      investment1.valuator_groups << group
-      investment2.valuator_groups << group
-
       assigned_investment_ids = valuator.assigned_investment_ids
 
       expect(assigned_investment_ids).to match_array [investment1.id, investment2.id]