diff --git a/test/utils/CMakeLists.txt b/test/utils/CMakeLists.txt
index 16a3afc40..84ea6c000 100644
--- a/test/utils/CMakeLists.txt
+++ b/test/utils/CMakeLists.txt
@@ -14,6 +14,7 @@ target_sources(
     asserts.cpp
     asserts.hpp
     execute_helpers.hpp
+    fizzy_c_engine.cpp
     fizzy_engine.cpp
     floating_point_utils.hpp
     hex.cpp
diff --git a/test/utils/fizzy_c_engine.cpp b/test/utils/fizzy_c_engine.cpp
new file mode 100644
index 000000000..00699d08f
--- /dev/null
+++ b/test/utils/fizzy_c_engine.cpp
@@ -0,0 +1,130 @@
+// Fizzy: A fast WebAssembly interpreter
+// Copyright 2019-2020 The Fizzy Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+#include <fizzy/fizzy.h>
+
+#include <test/utils/adler32.hpp>
+#include <test/utils/wasm_engine.hpp>
+#include <cassert>
+#include <cstring>
+
+namespace fizzy::test
+{
+class FizzyCEngine final : public WasmEngine
+{
+    FizzyInstance* m_instance = nullptr;
+
+public:
+    ~FizzyCEngine();
+
+    bool parse(bytes_view input) const final;
+    std::optional<FuncRef> find_function(
+        std::string_view name, std::string_view signature) const final;
+    bool instantiate(bytes_view wasm_binary) final;
+    bool init_memory(bytes_view memory) final;
+    bytes_view get_memory() const final;
+    Result execute(FuncRef func_ref, const std::vector<uint64_t>& args) final;
+};
+
+namespace
+{
+FizzyExecutionResult env_adler32(
+    void*, FizzyInstance* instance, const FizzyValue* args, size_t, int)
+{
+    auto* memory = fizzy_get_instance_memory_data(instance);
+    assert(memory != nullptr);
+    const auto size = fizzy_get_instance_memory_size(instance);
+    const auto ret = fizzy::test::adler32(
+        bytes_view(memory, size)
+            .substr(static_cast<uint32_t>(args[0].i64), static_cast<uint32_t>(args[1].i64)));
+    return {false, true, {ret}};
+}
+}  // namespace
+
+std::unique_ptr<WasmEngine> create_fizzy_c_engine()
+{
+    return std::make_unique<FizzyCEngine>();
+}
+
+FizzyCEngine::~FizzyCEngine()
+{
+    if (m_instance)
+        fizzy_free_instance(m_instance);
+}
+
+bool FizzyCEngine::parse(bytes_view input) const
+{
+    const auto module = fizzy_parse(input.data(), input.size());
+    if (!module)
+        return false;
+
+    fizzy_free_module(module);
+    return true;
+}
+
+bool FizzyCEngine::instantiate(bytes_view wasm_binary)
+{
+    const auto module = fizzy_parse(wasm_binary.data(), wasm_binary.size());
+    if (!module)
+        return false;
+
+    // TODO resolve_imported_functions
+    FizzyExternalFunction imports[] = {{env_adler32, nullptr}};
+    m_instance = fizzy_instantiate(module, imports, 1);
+
+    assert(m_instance != nullptr);
+    return true;
+}
+
+bool FizzyCEngine::init_memory(bytes_view memory)
+{
+    auto* instance_memory = fizzy_get_instance_memory_data(m_instance);
+    if (instance_memory == nullptr)
+        return false;
+
+    const auto size = fizzy_get_instance_memory_size(m_instance);
+    if (size < memory.size())
+        return false;
+
+    std::memcpy(instance_memory, memory.data(), memory.size());
+    return true;
+}
+
+bytes_view FizzyCEngine::get_memory() const
+{
+    auto* data = fizzy_get_instance_memory_data(m_instance);
+    if (data == nullptr)
+        return {};
+
+    const auto size = fizzy_get_instance_memory_size(m_instance);
+    return {data, size};
+}
+
+std::optional<WasmEngine::FuncRef> FizzyCEngine::find_function(
+    std::string_view name, std::string_view /*signature*/) const
+{
+    uint32_t func_idx;
+    if (!fizzy_find_exported_function(
+            fizzy_get_instance_module(m_instance), std::string{name}.c_str(), &func_idx))
+    {
+        // TODO check function type
+        return std::nullopt;
+    }
+    return func_idx;
+}
+
+WasmEngine::Result FizzyCEngine::execute(
+    WasmEngine::FuncRef func_ref, const std::vector<uint64_t>& args)
+{
+    static_assert(sizeof(uint64_t) == sizeof(FizzyValue));
+    const auto first_arg = reinterpret_cast<const FizzyValue*>(args.data());
+    const auto status = fizzy_execute(m_instance, static_cast<uint32_t>(func_ref), first_arg, 0);
+    if (status.trapped)
+        return {true, std::nullopt};
+    else if (status.has_value)
+        return {false, status.value.i64};
+    else
+        return {false, std::nullopt};
+}
+}  // namespace fizzy::test
diff --git a/test/utils/wasm_engine.hpp b/test/utils/wasm_engine.hpp
index 825f49113..d09e0e197 100644
--- a/test/utils/wasm_engine.hpp
+++ b/test/utils/wasm_engine.hpp
@@ -61,6 +61,7 @@ class WasmEngine
 void validate_function_signature(std::string_view signature);
 
 std::unique_ptr<WasmEngine> create_fizzy_engine();
+std::unique_ptr<WasmEngine> create_fizzy_c_engine();
 std::unique_ptr<WasmEngine> create_wabt_engine();
 std::unique_ptr<WasmEngine> create_wasm3_engine();
 }  // namespace fizzy::test