diff --git a/test/integration/standard_filter_test.rb b/test/integration/standard_filter_test.rb
index d95f5c9c..b633024b 100644
--- a/test/integration/standard_filter_test.rb
+++ b/test/integration/standard_filter_test.rb
@@ -140,6 +140,8 @@ class StandardFiltersTest < Minitest::Test
     assert_equal('1234567890', @filters.truncate('1234567890'))
     assert_equal("测试...", @filters.truncate("测试测试测试测试", 5))
     assert_equal('12341', @filters.truncate("1234567890", 5, 1))
+    assert_equal("foobar", @filters.truncate("foobar", 1 << 63))
+    assert_equal("...", @filters.truncate("foobar", -(1 << 63)))
   end
 
   def test_split