diff --git a/tests/meson.build b/tests/meson.build
index e24ffd7..b37a5e9 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -20,7 +20,8 @@ sources = files(
 	'race.cpp',
 	'algorithm.cpp',
 	'promise.cpp',
-	'sequenced.cpp'
+	'sequenced.cpp',
+	'post-ack.cpp'
 )
 
 exe = executable('gtests',
diff --git a/tests/post-ack.cpp b/tests/post-ack.cpp
new file mode 100644
index 0000000..97ddb1e
--- /dev/null
+++ b/tests/post-ack.cpp
@@ -0,0 +1,76 @@
+#include <memory>
+#include <async/post-ack.hpp>
+#include <gtest/gtest.h>
+
+TEST(PostAck, IntType) {
+	async::post_ack_mechanism<int> mech;
+
+	int ok1_ctr = 0, ok2_ctr = 0;
+
+	auto producer = [] (async::post_ack_mechanism<int> &mech) -> async::detached {
+		co_await mech.post(1);
+		co_await mech.post(2);
+	};
+
+	auto consumer = [&] (async::post_ack_mechanism<int> &mech) -> async::detached {
+		async::post_ack_agent<int> agent;
+		agent.attach(&mech);
+
+		auto handle = co_await agent.poll();
+		if (*handle == 1) ok1_ctr++;
+		handle.ack();
+
+		handle = co_await agent.poll();
+		if (*handle == 2) ok2_ctr++;
+		handle.ack();
+
+		agent.detach();
+	};
+
+	consumer(mech);
+	consumer(mech);
+	consumer(mech);
+
+	producer(mech);
+
+	ASSERT_EQ(ok1_ctr, 3);
+	ASSERT_EQ(ok2_ctr, 3);
+}
+
+TEST(PostAck, ImmovableType) {
+	async::post_ack_mechanism<std::unique_ptr<int>> mech;
+
+	int ok1_ctr = 0, ok2_ctr = 0;
+
+	auto producer = [] (async::post_ack_mechanism<std::unique_ptr<int>> &mech) -> async::detached {
+		co_await mech.post(std::make_unique<int>(1));
+		co_await mech.post(std::make_unique<int>(2));
+	};
+
+	auto consumer = [&] (async::post_ack_mechanism<std::unique_ptr<int>> &mech) -> async::detached {
+		async::post_ack_agent<std::unique_ptr<int>> agent;
+		agent.attach(&mech);
+
+		auto handle = co_await agent.poll();
+		if (*handle != nullptr) ok1_ctr++;
+		if (**handle == 1) ok1_ctr++;
+		handle.ack();
+
+		handle = co_await agent.poll();
+		if (*handle != nullptr) ok2_ctr++;
+		if (**handle == 2) ok2_ctr++;
+		handle.ack();
+
+		agent.detach();
+	};
+
+	consumer(mech);
+	consumer(mech);
+	consumer(mech);
+	consumer(mech);
+
+	producer(mech);
+
+	ASSERT_EQ(ok1_ctr, 8);
+	ASSERT_EQ(ok2_ctr, 8);
+}