diff --git a/tests/basic_tests.cpp b/tests/basic_tests.cpp
index 4435ff9ab..fa7e251a5 100644
--- a/tests/basic_tests.cpp
+++ b/tests/basic_tests.cpp
@@ -417,3 +417,14 @@ TYPED_TEST(basic_tests, nodejs_51619) {
   ASSERT_FALSE(out);
   SUCCEED();
 }
+
+// https://github.com/nodejs/undici/pull/2971
+TYPED_TEST(basic_tests, nodejs_undici_2971) {
+  std::string_view base = "https://non-ascii-location-header.sys.workers.dev/redirect";
+  auto base_url = ada::parse<TypeParam>(base);
+  ASSERT_TRUE(base_url);
+  auto out = ada::parse<TypeParam>("/\xec\x95\x88\xeb\x85\x95", &*base_url);
+  ASSERT_TRUE(out);
+  ASSERT_EQ(out->get_href(), R"(https://non-ascii-location-header.sys.workers.dev/%EC%95%88%EB%85%95)");
+  SUCCEED();
+}
\ No newline at end of file