diff --git a/app/controllers/admin/edition_workflow_controller.rb b/app/controllers/admin/edition_workflow_controller.rb
index 6272388fc08..69dbe31cb38 100644
--- a/app/controllers/admin/edition_workflow_controller.rb
+++ b/app/controllers/admin/edition_workflow_controller.rb
@@ -19,7 +19,7 @@ class Admin::EditionWorkflowController < Admin::BaseController
 
   rescue_from ActiveRecord::RecordInvalid do
     redirect_to admin_edition_path(@edition),
-                alert: "Unable to #{action_name_as_human_interaction(params[:action])} because it is invalid (#{@edition.errors.full_messages.to_sentence}). Please edit it and try again."
+                alert: "Unable to #{action_name_as_human_interaction(params[:action])} because #{@edition.errors.full_messages.to_sentence.downcase}. Please edit it and try again."
   end
 
   rescue_from Transitions::InvalidTransition do
diff --git a/app/models/edition/publishing.rb b/app/models/edition/publishing.rb
index 441d761d1fb..0c581eba463 100644
--- a/app/models/edition/publishing.rb
+++ b/app/models/edition/publishing.rb
@@ -57,7 +57,7 @@ def asset_manager_check_required?
   end
 
   def attachment_uploaded_to_asset_manager!
-    errors.add(:attachments, "must have finished uploading.") unless uploaded_to_asset_manager?
+    errors.add(:attachments, "must have finished uploading") unless uploaded_to_asset_manager?
   end
 
   def build_unpublishing(attributes = {})
diff --git a/test/functional/admin/edition_workflow_controller_test.rb b/test/functional/admin/edition_workflow_controller_test.rb
index 37f593c6859..d322a750718 100644
--- a/test/functional/admin/edition_workflow_controller_test.rb
+++ b/test/functional/admin/edition_workflow_controller_test.rb
@@ -169,7 +169,19 @@ class Admin::EditionWorkflowControllerTest < ActionController::TestCase
     post :submit, params: { id: draft_edition, lock_version: draft_edition.lock_version }
 
     assert_redirected_to admin_publication_path(draft_edition)
-    assert_equal "Unable to submit this edition because it is invalid (Summary can't be blank). Please edit it and try again.", flash[:alert]
+    assert_equal "Unable to submit this edition because summary can't be blank. Please edit it and try again.", flash[:alert]
+  end
+
+  test "submission error should read as a sentence when there are multiple validation errors" do
+    draft_edition.summary = nil
+    draft_edition.title = nil
+    attachment = build(:file_attachment_with_no_assets)
+    draft_edition.attachments << attachment
+    draft_edition.save!(validate: false)
+    post :submit, params: { id: draft_edition, lock_version: draft_edition.lock_version }
+
+    assert_redirected_to admin_publication_path(draft_edition)
+    assert_equal "Unable to submit this edition because title can't be blank, summary can't be blank, and alternative format provider can't be blank. Please edit it and try again.", flash[:alert]
   end
 
   test "submit responds with 422 if missing a lock version" do