diff --git a/app/models/submission.rb b/app/models/submission.rb
index 74472d9f3..61c640286 100644
--- a/app/models/submission.rb
+++ b/app/models/submission.rb
@@ -266,51 +266,47 @@ def self.bulk_corrections!(tutorial, assignment, files)
     report
   end
 
-  private
+  def self.number_of_submissions(tutorial, assignment)
+    Submission.where(tutorial: tutorial, assignment: assignment)
+              .where.not(manuscript_data: nil).size
+  end
 
-    def matching_lecture
-      return true if tutorial&.lecture == assignment&.lecture
+  def self.number_of_corrections(tutorial, assignment)
+    Submission.where(tutorial: tutorial, assignment: assignment)
+              .where.not(correction_data: nil).size
+  end
 
-      errors.add(:tutorial, :lecture_not_matching)
-    end
+  def self.number_of_late_submissions(tutorial, assignment)
+    Submission.where(tutorial: tutorial, assignment: assignment)
+              .where.not(manuscript_data: nil)
+              .count(&:too_late?)
+  end
 
-    def set_token
-      self.token = Submission.generate_token
-    end
+  def self.submissions_total(assignment)
+    Submission.where(assignment: assignment)
+              .where.not(manuscript_data: nil).size
+  end
 
-    def self.number_of_submissions(tutorial, assignment)
-      Submission.where(tutorial: tutorial, assignment: assignment)
-                .where.not(manuscript_data: nil).size
-    end
+  def self.corrections_total(assignment)
+    Submission.where(assignment: assignment)
+              .where.not(correction_data: nil).size
+  end
 
-    def self.number_of_corrections(tutorial, assignment)
-      Submission.where(tutorial: tutorial, assignment: assignment)
-                .where.not(correction_data: nil).size
-    end
+  def self.late_submissions_total(assignment)
+    Submission.where(assignment: assignment)
+              .where.not(manuscript_data: nil)
+              .count(&:too_late?)
+  end
 
-    def self.number_of_late_submissions(tutorial, assignment)
-      Submission.where(tutorial: tutorial, assignment: assignment)
-                .where.not(manuscript_data: nil)
-                .count(&:too_late?)
-    end
+  private
 
-    def self.submissions_total(assignment)
-      Submission.where(assignment: assignment)
-                .where.not(manuscript_data: nil).size
-    end
+    def matching_lecture
+      return true if tutorial&.lecture == assignment&.lecture
 
-    def self.corrections_total(assignment)
-      Submission.where(assignment: assignment)
-                .where.not(correction_data: nil).size
+      errors.add(:tutorial, :lecture_not_matching)
     end
 
-    def self.late_submissions_total(assignment)
-      Submission.where(assignment: assignment)
-                .where.not(manuscript_data: nil)
-                .count(&:too_late?)
+    def set_token
+      self.token = Submission.generate_token
     end
-
-    private_class_method :number_of_submissions, :number_of_corrections,
-                         :number_of_late_submissions, :submissions_total,
-                         :corrections_total, :late_submissions_total
 end