diff --git a/test/io_uring.cpp b/test/io_uring.cpp
new file mode 100644
index 0000000..5be1b91
--- /dev/null
+++ b/test/io_uring.cpp
@@ -0,0 +1,134 @@
+#include <poll.h>
+
+#include <stdplus/io_uring.hpp>
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace stdplus
+{
+
+using testing::_;
+
+class MockHandler : public IoUring::CQEHandler
+{
+  public:
+    MOCK_METHOD(void, handleCQE, (io_uring_cqe&), (noexcept, override));
+};
+
+class IoUringTest : public testing::Test
+{
+  protected:
+    static void SetUpTestCase()
+    {
+        io_uring r;
+        if (io_uring_queue_init(1, &r, 0) == -ENOSYS)
+        {
+            // Not supported, skip running this test
+            exit(77);
+        }
+        io_uring_queue_exit(&r);
+    }
+    std::array<testing::StrictMock<MockHandler>, 2> h;
+    IoUring ring;
+};
+
+TEST_F(IoUringTest, NullHandler)
+{
+    auto& sqe = ring.getSQE();
+    io_uring_prep_nop(&sqe);
+    ring.submit();
+    ring.process();
+}
+
+TEST_F(IoUringTest, HandlerCalled)
+{
+    {
+        auto& sqe = ring.getSQE();
+        io_uring_prep_nop(&sqe);
+        ring.setHandler(sqe, &h[0]);
+    }
+
+    // Nothing should happen without submission
+    ring.process();
+
+    {
+        auto& sqe = ring.getSQE();
+        io_uring_prep_nop(&sqe);
+        ring.setHandler(sqe, &h[1]);
+    }
+
+    // Handle all of the outstanding requests
+    ring.submit();
+    EXPECT_CALL(h[0], handleCQE(_));
+    EXPECT_CALL(h[1], handleCQE(_));
+    ring.process();
+    testing::Mock::VerifyAndClearExpectations(&h[0]);
+    testing::Mock::VerifyAndClearExpectations(&h[1]);
+}
+
+TEST_F(IoUringTest, HandlerReplacement)
+{
+    auto& sqe = ring.getSQE();
+    io_uring_prep_nop(&sqe);
+    ring.setHandler(sqe, &h[0]);
+
+    // Setting a new handler should cancel the old one
+    EXPECT_CALL(h[0], handleCQE(_));
+    ring.setHandler(sqe, &h[1]);
+    testing::Mock::VerifyAndClearExpectations(&h[0]);
+
+    // Setting a null handler should cancel the old one
+    EXPECT_CALL(h[1], handleCQE(_));
+    ring.setHandler(sqe, nullptr);
+    testing::Mock::VerifyAndClearExpectations(&h[1]);
+
+    // Set it back twice and make sure it isn't recognized idempotently
+    ring.setHandler(sqe, &h[1]);
+    ring.setHandler(sqe, &h[1]);
+
+    // Make sure it still works
+    ring.submit();
+    EXPECT_CALL(h[1], handleCQE(_));
+    ring.process();
+    testing::Mock::VerifyAndClearExpectations(&h[1]);
+}
+
+TEST_F(IoUringTest, EventFd)
+{
+    auto& efd = ring.getEventFd();
+
+    for (size_t i = 0; i < h.size(); ++i)
+    {
+        auto& sqe = ring.getSQE();
+        io_uring_prep_nop(&sqe);
+        ring.setHandler(sqe, &h[i]);
+        ring.submit();
+    }
+
+    // Our event fd should become ready
+    pollfd pfd;
+    pfd.fd = efd.get();
+    pfd.events = POLLIN;
+    ASSERT_EQ(1, poll(&pfd, 1, 100));
+
+    // Handle all of the outstanding requests
+    EXPECT_CALL(h[0], handleCQE(_));
+    EXPECT_CALL(h[1], handleCQE(_));
+    ring.processEvents();
+    testing::Mock::VerifyAndClearExpectations(&h[0]);
+    testing::Mock::VerifyAndClearExpectations(&h[1]);
+
+    // Our event fd should be empty
+    ASSERT_EQ(0, poll(&pfd, 1, 100));
+}
+
+TEST_F(IoUringTest, HandleCalledOnDestroy)
+{
+    auto& sqe = ring.getSQE();
+    io_uring_prep_nop(&sqe);
+    ring.setHandler(sqe, &h[0]);
+    EXPECT_CALL(h[0], handleCQE(_));
+}
+
+} // namespace stdplus