diff --git a/test/functional/issue_relations_controller_test.rb b/test/functional/issue_relations_controller_test.rb
index 1c6bd2c9a..e364da99c 100644
--- a/test/functional/issue_relations_controller_test.rb
+++ b/test/functional/issue_relations_controller_test.rb
@@ -47,6 +47,14 @@ class IssueRelationsControllerTest < ActionController::TestCase
     assert_equal 'relates', relation.relation_type
   end
 
+  def test_create_on_invalid_issue
+    assert_no_difference 'IssueRelation.count' do
+      post :create, :issue_id => 999,
+        :relation => {:issue_to_id => '2', :relation_type => 'relates', :delay => ''}
+      assert_response 404
+    end
+  end
+
   def test_create_xhr
     assert_difference 'IssueRelation.count' do
       xhr :post, :create, :issue_id => 3, :relation => {:issue_to_id => '1', :relation_type => 'relates', :delay => ''}
@@ -127,6 +135,13 @@ class IssueRelationsControllerTest < ActionController::TestCase
     end
   end
 
+  def test_destroy_invalid_relation
+    assert_no_difference 'IssueRelation.count' do
+      delete :destroy, :id => '999'
+      assert_response 404
+    end
+  end
+
   def test_destroy_xhr
     IssueRelation.create!(:relation_type => IssueRelation::TYPE_RELATES) do |r|
       r.issue_from_id = 3