diff --git a/tests/test.cpp b/tests/test.cpp
index 7985220..6a12e0e 100644
--- a/tests/test.cpp
+++ b/tests/test.cpp
@@ -2298,15 +2298,20 @@ BOOST_AUTO_TEST_CASE(ligo_http_raw_exchange_headers_query_and_status) {
   BOOST_REQUIRE(server.start());
   auto exercise = [&]() -> boost::asio::awaitable<void> {
     auto client = ligo::http::client{{"127.0.0.1", server.selected_port()}};
-    auto result = co_await client.exchange({.method = ligo::http::method::GET, .target = "/raw?search=two+words%2B", .headers = {{"If-None-Match", "revision-one"}}});
+    // GCC 12 can ICE on initializer-list temporaries in co_await expressions.
+    auto request = ligo::http::request{.method = ligo::http::method::GET, .target = "/raw?search=two+words%2B"};
+    request.headers.emplace("If-None-Match", "revision-one");
+    auto result = co_await client.exchange(request);
     BOOST_REQUIRE(result);
     BOOST_CHECK_EQUAL(result->status, 202);
     BOOST_CHECK_EQUAL(result->body, "not a JSON envelope");
     BOOST_CHECK_EQUAL(result->headers.at("etag"), "revision-two");
-    auto invalid = co_await client.exchange({.method = ligo::http::method::GET, .target = "/raw?search=%ZZ"});
+    auto invalid_request = ligo::http::request{.method = ligo::http::method::GET, .target = "/raw?search=%ZZ"};
+    auto invalid = co_await client.exchange(invalid_request);
     BOOST_REQUIRE(invalid);
     BOOST_CHECK_EQUAL(invalid->status, 400);
-    auto duplicate = co_await client.exchange({.method = ligo::http::method::GET, .target = "/raw?x=1&x=2"});
+    auto duplicate_request = ligo::http::request{.method = ligo::http::method::GET, .target = "/raw?x=1&x=2"};
+    auto duplicate = co_await client.exchange(duplicate_request);
     BOOST_REQUIRE(duplicate);
     BOOST_CHECK_EQUAL(duplicate->status, 400);
     server.stop();