diff --git a/include/ada/url_pattern.h b/include/ada/url_pattern.h
index fe2dae060..f8511e465 100644
--- a/include/ada/url_pattern.h
+++ b/include/ada/url_pattern.h
@@ -285,7 +285,7 @@ class url_pattern {
   /**
    * @see https://urlpattern.spec.whatwg.org/#dom-urlpattern-test
    */
-  bool test(const url_pattern_input& input, std::string_view* base_url);
+  result<bool> test(const url_pattern_input& input, std::string_view* base_url);
 
   /**
    * @see https://urlpattern.spec.whatwg.org/#url-pattern-match
diff --git a/src/url_pattern.cpp b/src/url_pattern.cpp
index d4ae3aad1..666c764ee 100644
--- a/src/url_pattern.cpp
+++ b/src/url_pattern.cpp
@@ -519,7 +519,7 @@ result<std::optional<url_pattern_result>> url_pattern::exec(
   return match(input, base_url);
 }
 
-bool url_pattern::test(const url_pattern_input& input,
+result<bool> url_pattern::test(const url_pattern_input& input,
                        std::string_view* base_url = nullptr) {
   // TODO: Optimization opportunity. Rather than returning `url_pattern_result`
   // Implement a fast path just like `can_parse()` in ada_url.
@@ -529,7 +529,7 @@ bool url_pattern::test(const url_pattern_input& input,
   if (auto result = match(input, base_url); result.has_value()) {
     return result->has_value();
   }
-  return false;
+  return tl::unexpected(errors::type_error);
 }
 
 result<std::optional<url_pattern_result>> url_pattern::match(