diff --git a/include/dawn/native/DawnNative.h b/include/dawn/native/DawnNative.h
index 1ff8d9b..915f3c6 100644
--- a/include/dawn/native/DawnNative.h
+++ b/include/dawn/native/DawnNative.h
@@ -157,6 +157,7 @@
 class DAWN_NATIVE_EXPORT Instance {
   public:
     explicit Instance(const WGPUInstanceDescriptor* desc = nullptr);
+    explicit Instance(InstanceBase* impl);
     ~Instance();
 
     Instance(const Instance& other) = delete;
diff --git a/src/dawn/fuzzers/DawnWireServerFuzzer.cpp b/src/dawn/fuzzers/DawnWireServerFuzzer.cpp
index ff50066..7ddc02c 100644
--- a/src/dawn/fuzzers/DawnWireServerFuzzer.cpp
+++ b/src/dawn/fuzzers/DawnWireServerFuzzer.cpp
@@ -115,7 +115,8 @@
                                       const WGPURequestAdapterOptions* options,
                                       WGPURequestAdapterCallback callback, void* userdata) {
         std::vector<dawn::native::Adapter> adapters =
-            reinterpret_cast<dawn::native::Instance*>(cInstance)->EnumerateAdapters();
+            dawn::native::Instance(reinterpret_cast<dawn::native::InstanceBase*>(cInstance))
+                .EnumerateAdapters();
         for (dawn::native::Adapter adapter : adapters) {
             if (sAdapterSupported(adapter)) {
                 WGPUAdapter cAdapter = adapter.Get();
@@ -137,14 +138,5 @@
     std::unique_ptr<dawn::wire::WireServer> wireServer(new dawn::wire::WireServer(serverDesc));
     wireServer->InjectInstance(instance->Get(), {1, 0});
     wireServer->HandleCommands(reinterpret_cast<const char*>(data), size);
-
-    // Flush remaining callbacks to avoid memory leaks.
-    // TODO(crbug.com/dawn/1712): DeviceNull's APITick() will always return true so cannot
-    // do a polling loop here.
-    dawn::native::InstanceProcessEvents(instance->Get());
-
-    // Note: Deleting the server will release all created objects.
-    // Deleted devices will wait for idle on destruction.
-    wireServer = nullptr;
     return 0;
 }
diff --git a/src/dawn/fuzzers/lpmfuzz/DawnLPMFuzzer.cpp b/src/dawn/fuzzers/lpmfuzz/DawnLPMFuzzer.cpp
index ed0f107..b30c205 100644
--- a/src/dawn/fuzzers/lpmfuzz/DawnLPMFuzzer.cpp
+++ b/src/dawn/fuzzers/lpmfuzz/DawnLPMFuzzer.cpp
@@ -89,7 +89,8 @@
                                       const WGPURequestAdapterOptions* options,
                                       WGPURequestAdapterCallback callback, void* userdata) {
         std::vector<dawn::native::Adapter> adapters =
-            reinterpret_cast<dawn::native::Instance*>(cInstance)->EnumerateAdapters();
+            dawn::native::Instance(reinterpret_cast<dawn::native::InstanceBase*>(cInstance))
+                .EnumerateAdapters();
         for (dawn::native::Adapter adapter : adapters) {
             if (sAdapterSupported(adapter)) {
                 WGPUAdapter cAdapter = adapter.Get();
@@ -124,7 +125,6 @@
     // Note: Deleting the server will release all created objects.
     // Deleted devices will wait for idle on destruction.
     mCommandBuffer->SetHandler(nullptr);
-    wireServer = nullptr;
     return result == dawn::wire::WireResult::FatalError;
 }
 
diff --git a/src/dawn/native/DawnNative.cpp b/src/dawn/native/DawnNative.cpp
index 71374e6..71a5e0c 100644
--- a/src/dawn/native/DawnNative.cpp
+++ b/src/dawn/native/DawnNative.cpp
@@ -170,6 +170,13 @@
     tint::Initialize();
 }
 
+Instance::Instance(InstanceBase* impl) : mImpl(impl) {
+    if (mImpl != nullptr) {
+        mImpl->APIAddRef();
+    }
+    tint::Initialize();
+}
+
 Instance::~Instance() {
     if (mImpl != nullptr) {
         mImpl->APIRelease();