diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index 50ebce4e8d8..9be9a0d364d 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -46,8 +46,7 @@ def display_dashboard
     @inactive_students = User.with_attached_avatar.inactive_students_and_trainees.order(last_activity_at: :desc)
     @job_seeking_users = User.with_attached_avatar.job_seeking.includes(:reports, :products, :works, :course, :company)
     @colleague_trainees = current_user.colleague_trainees.with_attached_avatar.includes(:reports, :products, :comments)
-    colleague_trainees_reports = Report.with_avatar.where(wip: false).where(user: current_user.colleague_trainees.with_attached_avatar)
-    @colleague_trainees_recent_reports = colleague_trainees_reports.order(reported_on: :desc).limit(10)
+    @colleague_trainees_recent_reports = ColleagueTraineesRecentReportsQuery.new(current_user:).call.limit(10)
     @recent_reports = Report.with_avatar.where(wip: false).order(reported_on: :desc, created_at: :desc).limit(10)
     @product_deadline_day = Product::PRODUCT_DEADLINE
     @colleagues = current_user.colleagues_other_than_self
diff --git a/app/queries/colleague_trainees_recent_reports_query.rb b/app/queries/colleague_trainees_recent_reports_query.rb
new file mode 100644
index 00000000000..93f0e7ddee7
--- /dev/null
+++ b/app/queries/colleague_trainees_recent_reports_query.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class ColleagueTraineesRecentReportsQuery < Patterns::Query
+  queries Report
+
+  private
+
+  def query
+    relation
+      .joins(:user)
+      .where(users: { id: colleague_trainee_ids })
+      .not_wip
+      .default_order
+      .with_avatar
+  end
+
+  def initialize(relation = Report.all, current_user:)
+    super(relation)
+    @current_user = current_user
+  end
+
+  def colleague_trainee_ids
+    @current_user.colleague_trainees.pluck(:id)
+  end
+end
diff --git a/test/fixtures/reports.yml b/test/fixtures/reports.yml
index 9425488d21d..96ac2491bd9 100644
--- a/test/fixtures/reports.yml
+++ b/test/fixtures/reports.yml
@@ -350,3 +350,11 @@ report74:
   description: 休会します
   wip: true
   reported_on: "2019-12-31"
+
+report75:
+  user: kensyu
+  title: WIPの日報
+  emotion: 1
+  description: WIPです
+  wip: true
+  reported_on: "2022-04-02"
diff --git a/test/queries/colleague_trainees_recent_reports_query_test.rb b/test/queries/colleague_trainees_recent_reports_query_test.rb
new file mode 100644
index 00000000000..4353b97a2e9
--- /dev/null
+++ b/test/queries/colleague_trainees_recent_reports_query_test.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class ColleagueTraineesRecentReportsQueryTest < ActiveSupport::TestCase
+  test 'should return colleague trainees recent reports' do
+    user = users(:senpai)
+    trainee_report = reports(:report11)
+    other_report = reports(:report10)
+
+    result = ColleagueTraineesRecentReportsQuery.new(current_user: user).call
+
+    assert_includes result, trainee_report
+    assert_not_includes result, other_report
+  end
+
+  test 'should exclude report with wip' do
+    user = users(:senpai)
+    wip_report = reports(:report75)
+
+    result = ColleagueTraineesRecentReportsQuery.new(current_user: user).call
+
+    assert_not_includes result, wip_report
+  end
+
+  test 'should be ordered by recent' do
+    user = users(:senpai)
+
+    result = ColleagueTraineesRecentReportsQuery.new(current_user: user).call
+
+    dates = result.map(&:reported_on)
+    assert_equal dates, dates.sort.reverse
+  end
+end
diff --git a/test/system/training_completion_test.rb b/test/system/training_completion_test.rb
index 61976cf5fbe..784faad9da8 100644
--- a/test/system/training_completion_test.rb
+++ b/test/system/training_completion_test.rb
@@ -86,12 +86,13 @@ class TrainingCompletionTest < ApplicationSystemTestCase
 
     visit new_training_completion_path
     find('label', text: 'とても良い').click
-    assert_difference '@user.reports.wip.count', -1 do
-      page.accept_confirm '本当によろしいですか？' do
-        click_on '研修を終了する'
-      end
-      assert_text '研修終了手続きが完了しました'
+
+    page.accept_confirm '本当によろしいですか？' do
+      click_on '研修を終了する'
     end
+
+    assert_text '研修終了手続きが完了しました'
+    assert_not @user.reports.wip.exists?
     assert_equal Time.current, @user.reload.training_completed_at
   end