diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8edbc4d4..0e1f2022 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -107,10 +107,10 @@ jobs:
 
       # Run stubs
       - name: Run HTTP stub (Windows)
-        run: cmd /c "start /b node test\http\stub.js" && Start-Sleep -Seconds 2
+        run: cmd /c "start /b node test\http\stub.js" && Start-Sleep -Seconds 10
         if: runner.os == 'windows'
       - name: Run HTTP stub (*nix)
-        run: (node test/http/stub.js &) && sleep 2
+        run: (node test/http/stub.js &) && sleep 10
         if: runner.os != 'windows'
 
       # Not every CTest version supports the --test-dir option. If such option
diff --git a/src/http/include/sourcemeta/hydra/http_request.h b/src/http/include/sourcemeta/hydra/http_request.h
index b6b1e5ce..7ff9de8f 100644
--- a/src/http/include/sourcemeta/hydra/http_request.h
+++ b/src/http/include/sourcemeta/hydra/http_request.h
@@ -19,6 +19,7 @@
 
 namespace sourcemeta::hydra::http {
 
+// TODO: Support passing a request body
 class SOURCEMETA_HYDRA_HTTP_EXPORT Request {
 public:
   Request(std::string url);
diff --git a/src/http/include/sourcemeta/hydra/http_response.h b/src/http/include/sourcemeta/hydra/http_response.h
index 4415af64..3b622642 100644
--- a/src/http/include/sourcemeta/hydra/http_response.h
+++ b/src/http/include/sourcemeta/hydra/http_response.h
@@ -23,6 +23,7 @@ class SOURCEMETA_HYDRA_HTTP_EXPORT Response {
 
   auto status() const noexcept -> Status;
   auto header(const std::string &key) const -> std::optional<std::string>;
+  auto empty() noexcept -> bool;
   auto body() -> std::istringstream &;
 
 private:
diff --git a/src/http/response.cc b/src/http/response.cc
index 555d1715..081ad8c2 100644
--- a/src/http/response.cc
+++ b/src/http/response.cc
@@ -1,6 +1,7 @@
 #include <sourcemeta/hydra/http_response.h>
 #include <sourcemeta/hydra/http_status.h>
 
+#include <cassert>  // assert
 #include <map>      // std::map
 #include <optional> // std::optional, std::nullopt
 #include <sstream>  // std::ostringstream, std::istringstream
@@ -26,6 +27,11 @@ auto Response::header(const std::string &key) const
   return this->headers_.at(key);
 }
 
-auto Response::body() -> std::istringstream & { return this->stream_; }
+auto Response::empty() noexcept -> bool { return this->stream_.peek() == -1; }
+
+auto Response::body() -> std::istringstream & {
+  assert(!this->empty());
+  return this->stream_;
+}
 
 } // namespace sourcemeta::hydra::http
diff --git a/src/http/stream_curl.cc b/src/http/stream_curl.cc
index 2cbe795e..92ea0631 100644
--- a/src/http/stream_curl.cc
+++ b/src/http/stream_curl.cc
@@ -5,11 +5,14 @@
 
 #include <curl/curl.h>
 
+#include <algorithm>    // std::transform
 #include <cassert>      // assert
+#include <cctype>       // std::tolower
 #include <charconv>     // std::from_chars
 #include <cstddef>      // std::size_t
 #include <cstdint>      // std::uint64_t
 #include <future>       // std::future
+#include <iterator>     // std::back_inserter
 #include <memory>       // std::make_unique
 #include <optional>     // std::optional
 #include <sstream>      // std::stringstream
@@ -107,9 +110,15 @@ auto callback_on_header(const void *const data, const std::size_t size,
   if (request->internal->on_header) {
     try {
       assert(request->internal->status.has_value());
+
+      std::string_view key{line.substr(key_start, key_end - key_start)};
+      std::string key_lowercase;
+      std::transform(
+          key.cbegin(), key.cend(), std::back_inserter(key_lowercase),
+          [](unsigned char character) { return std::tolower(character); });
+
       request->internal->on_header(
-          request->internal->status.value(),
-          line.substr(key_start, key_end - key_start),
+          request->internal->status.value(), key_lowercase,
           line.substr(value_start, value_end - value_start));
     } catch (...) {
       return 0;
diff --git a/test/http/CMakeLists.txt b/test/http/CMakeLists.txt
index ba809664..707a5e21 100644
--- a/test/http/CMakeLists.txt
+++ b/test/http/CMakeLists.txt
@@ -1,4 +1,5 @@
-# Tests
+# TODO: Add HTTP/2 tests
+
 add_executable(sourcemeta_hydra_http_unit
   request_1_1_test.cc)
 sourcemeta_hydra_add_compile_options(sourcemeta_hydra_http_unit)
diff --git a/test/http/request_1_1_test.cc b/test/http/request_1_1_test.cc
index 5029bdff..9f24df22 100644
--- a/test/http/request_1_1_test.cc
+++ b/test/http/request_1_1_test.cc
@@ -1,11 +1,232 @@
+#include <algorithm>
+#include <iterator>
+#include <sstream>
+#include <string>
+
 #include <gtest/gtest.h>
 #include <sourcemeta/hydra/http.h>
 
-// TODO: Add more tests
+static auto body(sourcemeta::hydra::http::Response &response) -> std::string {
+  std::ostringstream result;
+  std::copy(
+      std::istreambuf_iterator<std::ostringstream::char_type>(response.body()),
+      std::istreambuf_iterator<std::ostringstream::char_type>(),
+      std::ostreambuf_iterator<std::ostringstream::char_type>(result));
+  return result.str();
+}
+
+TEST(HTTP_Request_1_1, GET_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+}
+
+TEST(HTTP_Request_1_1, HEAD_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::HEAD);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_TRUE(response.empty());
+}
+
+TEST(HTTP_Request_1_1, POST_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::POST);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED POST /");
+}
+
+TEST(HTTP_Request_1_1, PUT_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::PUT);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED PUT /");
+}
+
+TEST(HTTP_Request_1_1, DELETE_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::DELETE);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED DELETE /");
+}
+
+TEST(HTTP_Request_1_1, OPTIONS_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::OPTIONS);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED OPTIONS /");
+}
+
+TEST(HTTP_Request_1_1, TRACE_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::TRACE);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED TRACE /");
+}
+
+TEST(HTTP_Request_1_1, PATCH_root) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::PATCH);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED PATCH /");
+}
+
+TEST(HTTP_Request_1_1, GET_root_foo_bar) {
+  sourcemeta::hydra::http::Request request{std::string{BASE_URL} + "/foo/bar"};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /foo/bar");
+}
+
+TEST(HTTP_Request_1_1, GET_root_custom_code_string) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.header("X-Code", "400");
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::BAD_REQUEST);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+}
+
+TEST(HTTP_Request_1_1, GET_root_custom_code_integer) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.header("X-Code", 400);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::BAD_REQUEST);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+}
+
+TEST(HTTP_Request_1_1, GET_root_response_content_type_no_capture) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_FALSE(response.header("content-type").has_value());
+}
+
+TEST(HTTP_Request_1_1, GET_root_response_content_type_capture) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.capture("content-type");
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("content-type").has_value());
+  EXPECT_EQ(response.header("content-type").value(), "text/plain");
+}
+
+TEST(HTTP_Request_1_1, GET_root_missing_header_with_capture) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.capture("x-foo-bar");
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_FALSE(response.header("x-foo-bar").has_value());
+}
+
+TEST(HTTP_Request_1_1, GET_root_multiple_captures_match) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.capture("content-type");
+  request.capture("content-length");
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("content-type").has_value());
+  EXPECT_TRUE(response.header("content-length").has_value());
+  EXPECT_EQ(response.header("content-type").value(), "text/plain");
+  EXPECT_EQ(response.header("content-length").value(), "14");
+}
+
+TEST(HTTP_Request_1_1, GET_root_multiple_captures_partial_match) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.capture("content-type");
+  request.capture("x-foo-bar");
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("content-type").has_value());
+  EXPECT_FALSE(response.header("x-foo-bar").has_value());
+  EXPECT_EQ(response.header("content-type").value(), "text/plain");
+}
+
+TEST(HTTP_Request_1_1, GET_root_multiple_captures_match_initializer_list) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.capture({"content-type", "content-length"});
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("content-type").has_value());
+  EXPECT_TRUE(response.header("content-length").has_value());
+  EXPECT_EQ(response.header("content-type").value(), "text/plain");
+  EXPECT_EQ(response.header("content-length").value(), "14");
+}
+
+TEST(HTTP_Request_1_1,
+     GET_root_multiple_captures_partial_match_initializer_list) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.capture({"content-type", "x-foo-bar"});
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("content-type").has_value());
+  EXPECT_FALSE(response.header("x-foo-bar").has_value());
+  EXPECT_EQ(response.header("content-type").value(), "text/plain");
+}
+
+TEST(HTTP_Request_1_1, GET_root_request_header_echo) {
+  sourcemeta::hydra::http::Request request{BASE_URL};
+  request.method(sourcemeta::hydra::http::Method::GET);
+  request.header("x-foo-bar", "foo");
+  request.capture("x-x-foo-bar");
+  sourcemeta::hydra::http::Response response{request.send().get()};
+  EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("x-x-foo-bar").has_value());
+  EXPECT_EQ(response.header("x-x-foo-bar").value(), "foo");
+}
 
-TEST(HTTP_Request_1_1, XXX) {
+TEST(HTTP_Request_1_1, GET_root_request_header_mixed_case_echo) {
   sourcemeta::hydra::http::Request request{BASE_URL};
   request.method(sourcemeta::hydra::http::Method::GET);
+  request.header("X-Foo-Bar", "foo");
+  request.capture("x-x-foo-bar");
   sourcemeta::hydra::http::Response response{request.send().get()};
   EXPECT_EQ(response.status(), sourcemeta::hydra::http::Status::OK);
+  EXPECT_FALSE(response.empty());
+  EXPECT_EQ(body(response), "RECEIVED GET /");
+  EXPECT_TRUE(response.header("x-x-foo-bar").has_value());
+  EXPECT_EQ(response.header("x-x-foo-bar").value(), "foo");
 }
diff --git a/test/http/stub.js b/test/http/stub.js
index 8e134ecb..98709d6a 100644
--- a/test/http/stub.js
+++ b/test/http/stub.js
@@ -1,20 +1,17 @@
 const http = require('http');
+const PORT = 9999;
 
-const server = http.createServer((req, res) => {
-  // Set the response header to indicate JSON content
-  res.setHeader('Content-Type', 'application/json');
-
-  // Define a simple JSON response
-  const jsonResponse = {
-    message: 'Hello, JSON World!',
-    timestamp: new Date().toISOString(),
-  };
+http.createServer((request, response) => {
+  for (const [key, value] of Object.entries(request.headers)) {
+    response.setHeader(`X-${key}`, value);
+  }
 
-  // Send the JSON response
-  res.end(JSON.stringify(jsonResponse));
-});
+  if (request.headers['x-code']) {
+    response.statusCode = parseInt(request.headers['x-code'], 10);
+  }
 
-const PORT = 9999;
-server.listen(PORT, () => {
+  response.setHeader('Content-Type', 'text/plain');
+  response.end(`RECEIVED ${request.method} ${request.url}`);
+}).listen(PORT, () => {
   console.log(`Server is listening on port ${PORT}`);
 });