diff --git a/Core/Node-API/Source/js_native_api_javascriptcore.cc b/Core/Node-API/Source/js_native_api_javascriptcore.cc
index 5c8583bc..6fa43e82 100644
--- a/Core/Node-API/Source/js_native_api_javascriptcore.cc
+++ b/Core/Node-API/Source/js_native_api_javascriptcore.cc
@@ -222,6 +222,28 @@ namespace {
     return napi_set_last_error(env, napi_pending_exception);
   }
 
+  // Property access follows ToObject(), as it does in Node: a primitive receiver is boxed, while
+  // null and undefined leave their TypeError pending and report napi_object_expected. Handing a
+  // primitive straight to JSObject* entry points is a RELEASE_ASSERT inside JavaScriptCore.
+  napi_status ToJSObjectCoerced(napi_env env, napi_value value, JSObjectRef* result) {
+    CHECK_ARG(env, value);
+    const JSValueRef js_value{ToJSValue(value)};
+    if (JSValueIsObject(env->context, js_value)) {
+      *result = ToJSObject(env, value);
+      return napi_ok;
+    }
+
+    JSValueRef exception{};
+    *result = JSValueToObject(env->context, js_value, &exception);
+    if (*result == nullptr) {
+      if (exception != nullptr) {
+        env->last_exception = exception;
+      }
+      return napi_set_last_error(env, napi_object_expected);
+    }
+    return napi_ok;
+  }
+
   napi_status napi_set_error_code(napi_env env,
                                   napi_value error,
                                   napi_value code,
@@ -645,6 +667,7 @@ namespace {
     }
 
     static napi_status Wrap(napi_env env, napi_value object, WrapperInfo** result) {
+      RETURN_STATUS_IF_FALSE(env, JSValueIsObject(env->context, ToJSValue(object)), napi_invalid_arg);
       WrapperInfo* info{};
       CHECK_NAPI(Unwrap(env, object, &info));
       if (info == nullptr) {
@@ -662,6 +685,7 @@ namespace {
     }
 
     static napi_status Unwrap(napi_env env, napi_value object, WrapperInfo** result) {
+      RETURN_STATUS_IF_FALSE(env, JSValueIsObject(env->context, ToJSValue(object)), napi_invalid_arg);
       CHECK_NAPI(NativeInfo::Query<WrapperInfo>(env, ToJSObject(env, object), result));
       return napi_ok;
     }
@@ -733,6 +757,10 @@ struct napi_ref__ {
 
   napi_status init(napi_env env, napi_value value, uint32_t count) {
     assert(!_value);
+    if (!JSValueIsObject(env->context, ToJSValue(value))) {
+      return init_primitive(env, value, count);
+    }
+
     _value = value;
     _count = count;
 
@@ -766,7 +794,7 @@ struct napi_ref__ {
   }
 
   void deinit(napi_env env) {
-    if (_count != 0) {
+    if (_protected) {
       unprotect(env);
     }
 
@@ -775,8 +803,16 @@ struct napi_ref__ {
   }
 
   void ref(napi_env env) {
-    assert(_value);
-    if (_count++ == 0) {
+    if (_value == nullptr) {
+      // A primitive released at count zero cannot come back; Node reports a count of zero too.
+      return;
+    }
+    if (_count == 0 && _kind == Kind::Object && !IsObjectAlive(env)) {
+      // The weak target has been collected (or its address reused by another object): promoting
+      // it would protect a stale pointer. Node likewise leaves such a reference at zero.
+      return;
+    }
+    if (_count++ == 0 && !_protected) {
       protect(env);
     }
   }
@@ -785,7 +821,13 @@ struct napi_ref__ {
     assert(_value);
     assert(_count != 0);
     if (--_count == 0) {
-      unprotect(env);
+      if (_kind == Kind::Object) {
+        unprotect(env);
+      } else if (_kind == Kind::Primitive) {
+        unprotect(env);
+        _value = nullptr;
+      }
+      // A symbol stays protected: see init_primitive.
     }
   }
 
@@ -794,34 +836,76 @@ struct napi_ref__ {
   }
 
   napi_status value(napi_env env, napi_value* result) const {
-    assert(_value);
-    if (env->active_ref_values.find(_value) != env->active_ref_values.end()) {
-      std::uintptr_t objectId{};
-      // NOTE: This check is needed for the same reason we need a similar check in the init function.
-      // See the comment in init for more details.
-      CHECK_NAPI(ReferenceInfo::GetObjectId(env, _value, &objectId));
-      if (objectId == _objectId) {
-        *result = _value;
-      }
+    *result = nullptr;
+    if (_value == nullptr) {
+      return napi_ok;
+    }
+    if (_kind != Kind::Object) {
+      *result = _value;
+      return napi_ok;
+    }
+    if (IsObjectAlive(env)) {
+      *result = _value;
     }
 
     return napi_ok;
   }
 
  private:
+  // Whether the weakly tracked object is still the one this reference was created for. The
+  // sentinel finalizer removes the active entry once the object is collected, and the object id
+  // check catches an address reused by a newer object before that finalizer ran (see init).
+  bool IsObjectAlive(napi_env env) const {
+    if (env->active_ref_values.find(_value) == env->active_ref_values.end()) {
+      return false;
+    }
+    std::uintptr_t objectId{};
+    return ReferenceInfo::GetObjectId(env, _value, &objectId) == napi_ok && objectId == _objectId;
+  }
+
+  enum class Kind {
+    Object,
+    Symbol,
+    Primitive,
+  };
+
+  // Primitives carry no identity to hang a sentinel on, and the JavaScriptCore C API has no weak
+  // handle for them, so they are held strongly while the count is positive and released once it
+  // reaches zero, which is what Node does for values it cannot hold weakly. Symbols are the
+  // exception: a weak reference to one has to keep resolving for as long as the symbol is alive,
+  // and that cannot be observed through the C API, so they stay protected for the life of the
+  // reference. Before Node-API 10 only symbols were referenceable among the non-objects.
+  napi_status init_primitive(napi_env env, napi_value value, uint32_t count) {
+    const bool symbol{JSValueIsSymbol(env->context, ToJSValue(value))};
+#if NAPI_VERSION < 10
+    RETURN_STATUS_IF_FALSE(env, symbol, napi_invalid_arg);
+#endif
+    _kind = symbol ? Kind::Symbol : Kind::Primitive;
+    _count = count;
+    if (symbol || _count != 0) {
+      _value = value;
+      protect(env);
+    }
+    return napi_ok;
+  }
+
   void protect(napi_env env) {
     _iter = env->strong_refs.insert(env->strong_refs.end(), this);
     JSValueProtect(env->context, ToJSValue(_value));
+    _protected = true;
   }
 
   void unprotect(napi_env env) {
     env->strong_refs.erase(_iter);
     JSValueUnprotect(env->context, ToJSValue(_value));
+    _protected = false;
   }
 
   napi_value _value{};
   uint32_t _count{};
   std::uintptr_t _objectId{};
+  Kind _kind{Kind::Object};
+  bool _protected{false};
   std::list<napi_ref>::iterator _iter{};
 };
 
@@ -983,13 +1067,16 @@ napi_status napi_set_property(napi_env env,
   CHECK_ARG(env, key);
   CHECK_ARG(env, value);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSString key_str{ToJSString(env, key, &exception)};
   CHECK_JSC(env, exception);
 
   JSObjectSetProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     key_str,
     ToJSValue(value),
     kJSPropertyAttributeNone,
@@ -1007,13 +1094,16 @@ napi_status napi_has_property(napi_env env,
   CHECK_ARG(env, result);
   CHECK_ARG(env, key);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSString key_str{ToJSString(env, key, &exception)};
   CHECK_JSC(env, exception);
 
   *result = JSObjectHasProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     key_str);
   return napi_ok;
 }
@@ -1026,13 +1116,16 @@ napi_status napi_get_property(napi_env env,
   CHECK_ARG(env, key);
   CHECK_ARG(env, result);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSString key_str{ToJSString(env, key, &exception)};
   CHECK_JSC(env, exception);
 
   *result = ToNapi(JSObjectGetProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     key_str,
     &exception));
   CHECK_JSC(env, exception);
@@ -1047,13 +1140,16 @@ napi_status napi_delete_property(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, result);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSString key_str{ToJSString(env, key, &exception)};
   CHECK_JSC(env, exception);
 
   *result = JSObjectDeleteProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     key_str,
     &exception);
   CHECK_JSC(env, exception);
@@ -1085,10 +1181,13 @@ napi_status napi_set_named_property(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, value);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSObjectSetProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     JSString(utf8name),
     ToJSValue(value),
     kJSPropertyAttributeNone,
@@ -1103,11 +1202,14 @@ napi_status napi_has_named_property(napi_env env,
                                     const char* utf8name,
                                     bool* result) {
   CHECK_ENV(env);
-  CHECK_ARG(env, object);
+  CHECK_ARG(env, result);
+
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
 
   *result = JSObjectHasProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     JSString(utf8name));
 
   return napi_ok;
@@ -1118,12 +1220,15 @@ napi_status napi_get_named_property(napi_env env,
                                     const char* utf8name,
                                     napi_value* result) {
   CHECK_ENV(env);
-  CHECK_ARG(env, object);
+  CHECK_ARG(env, result);
+
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
 
   JSValueRef exception{};
   *result = ToNapi(JSObjectGetProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     JSString(utf8name),
     &exception));
   CHECK_JSC(env, exception);
@@ -1138,10 +1243,13 @@ napi_status napi_set_element(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, value);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSObjectSetPropertyAtIndex(
     env->context,
-    ToJSObject(env, object),
+    target,
     index,
     ToJSValue(value),
     &exception);
@@ -1157,10 +1265,13 @@ napi_status napi_has_element(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, result);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSValueRef value{JSObjectGetPropertyAtIndex(
     env->context,
-    ToJSObject(env, object),
+    target,
     index,
     &exception)};
   CHECK_JSC(env, exception);
@@ -1176,10 +1287,13 @@ napi_status napi_get_element(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, result);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   *result = ToNapi(JSObjectGetPropertyAtIndex(
     env->context,
-    ToJSObject(env, object),
+    target,
     index,
     &exception));
   CHECK_JSC(env, exception);
@@ -1196,13 +1310,16 @@ napi_status napi_delete_element(napi_env env,
 
   napi_value index_value{ToNapi(JSValueMakeNumber(env->context, index))};
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
   JSString index_str{ToJSString(env, index_value, &exception)};
   CHECK_JSC(env, exception);
 
   *result = JSObjectDeleteProperty(
     env->context,
-    ToJSObject(env, object),
+    target,
     index_str,
     &exception);
   CHECK_JSC(env, exception);
@@ -1295,6 +1412,8 @@ napi_status napi_get_array_length(napi_env env,
   CHECK_ARG(env, value);
   CHECK_ARG(env, result);
 
+  RETURN_STATUS_IF_FALSE(env, JSValueIsArray(env->context, ToJSValue(value)), napi_array_expected);
+
   JSValueRef exception{};
   JSValueRef length = JSObjectGetProperty(
     env->context,
@@ -1330,8 +1449,11 @@ napi_status napi_get_prototype(napi_env env,
   CHECK_ENV(env);
   CHECK_ARG(env, result);
 
+  JSObjectRef target{};
+  CHECK_NAPI(ToJSObjectCoerced(env, object, &target));
+
   JSValueRef exception{};
-  JSObjectRef prototype{JSValueToObject(env->context, JSObjectGetPrototype(env->context, ToJSObject(env, object)), &exception)};
+  JSObjectRef prototype{JSValueToObject(env->context, JSObjectGetPrototype(env->context, target), &exception)};
   CHECK_JSC(env, exception);
 
   *result = ToNapi(prototype);
@@ -1643,15 +1765,27 @@ napi_status napi_call_function(napi_env env,
                                napi_value* result) {
   CHECK_ENV(env);
   CHECK_ARG(env, recv);
+  CHECK_ARG(env, func);
   if (argc > 0) {
     CHECK_ARG(env, argv);
   }
+  // Only object-ness is checked here: a non-callable object surfaces as the TypeError that
+  // Function.prototype.call raises, whereas some JavaScriptCore builds report JSObjectMakeConstructor
+  // constructors as not-a-function (see napi_typeof).
+  RETURN_STATUS_IF_FALSE(env, JSValueIsObject(env->context, ToJSValue(func)), napi_function_expected);
+
+  // The receiver may be any value. A primitive is boxed as ToObject would; undefined and null
+  // become the null receiver, for which JavaScriptCore supplies the global object.
+  JSObjectRef receiver{};
+  if (!JSValueIsUndefined(env->context, ToJSValue(recv)) && !JSValueIsNull(env->context, ToJSValue(recv))) {
+    CHECK_NAPI(ToJSObjectCoerced(env, recv, &receiver));
+  }
 
   JSValueRef exception{};
   JSValueRef return_value{JSObjectCallAsFunction(
     env->context,
     ToJSObject(env, func),
-    JSValueIsUndefined(env->context, ToJSValue(recv)) ? nullptr : ToJSObject(env, recv),
+    receiver,
     argc,
     ToJSValues(argv),
     &exception)};
@@ -2038,6 +2172,8 @@ napi_status napi_get_value_external(napi_env env, napi_value value, void** resul
   CHECK_ARG(env, value);
   CHECK_ARG(env, result);
 
+  RETURN_STATUS_IF_FALSE(env, JSValueIsObject(env->context, ToJSValue(value)), napi_invalid_arg);
+
   ExternalInfo* info = NativeInfo::Get<ExternalInfo>(ToJSObject(env, value));
   *result = (info != nullptr && info->Type() == NativeType::External) ? info->Data() : nullptr;
   return napi_ok;
@@ -2057,7 +2193,11 @@ napi_status napi_create_reference(napi_env env,
     return napi_set_last_error(env, napi_generic_failure);
   }
 
-  ref->init(env, value, initial_refcount);
+  const napi_status status{ref->init(env, value, initial_refcount)};
+  if (status != napi_ok) {
+    delete ref;
+    return status;
+  }
   *result = ref;
 
   return napi_ok;
@@ -2098,6 +2238,7 @@ napi_status napi_reference_ref(napi_env env, napi_ref ref, uint32_t* result) {
 napi_status napi_reference_unref(napi_env env, napi_ref ref, uint32_t* result) {
   CHECK_ENV(env);
   CHECK_ARG(env, ref);
+  RETURN_STATUS_IF_FALSE(env, ref->count() != 0, napi_generic_failure);
 
   ref->unref(env);
   if (result != nullptr) {
@@ -2196,6 +2337,10 @@ napi_status napi_new_instance(napi_env env,
     CHECK_ARG(env, argv);
   }
   CHECK_ARG(env, result);
+  RETURN_STATUS_IF_FALSE(env,
+    JSValueIsObject(env->context, ToJSValue(constructor)) &&
+      JSObjectIsConstructor(env->context, ToJSObject(env, constructor)),
+    napi_function_expected);
 
   JSValueRef exception{};
   *result = ToNapi(JSObjectCallAsConstructor(
@@ -2215,7 +2360,15 @@ napi_status napi_instanceof(napi_env env,
                             bool* result) {
   CHECK_ENV(env);
   CHECK_ARG(env, object);
+  CHECK_ARG(env, constructor);
   CHECK_ARG(env, result);
+  // Either predicate: some JavaScriptCore builds report JSObjectMakeConstructor constructors as
+  // not-a-function (see napi_typeof).
+  RETURN_STATUS_IF_FALSE(env,
+    JSValueIsObject(env->context, ToJSValue(constructor)) &&
+      (JSObjectIsFunction(env->context, ToJSObject(env, constructor)) ||
+       JSObjectIsConstructor(env->context, ToJSObject(env, constructor))),
+    napi_function_expected);
 
   JSValueRef exception{};
   *result = JSValueIsInstanceOfConstructor(
diff --git a/Tests/UnitTests/Android/app/src/main/cpp/CMakeLists.txt b/Tests/UnitTests/Android/app/src/main/cpp/CMakeLists.txt
index 2e31e0fb..9b1c9482 100644
--- a/Tests/UnitTests/Android/app/src/main/cpp/CMakeLists.txt
+++ b/Tests/UnitTests/Android/app/src/main/cpp/CMakeLists.txt
@@ -29,6 +29,11 @@ if(NAPI_JAVASCRIPT_ENGINE STREQUAL "V8")
     target_link_libraries(UnitTestsJNI PRIVATE AppRuntimeInternal)
 endif()
 
+# Mirrors Tests/UnitTests/CMakeLists.txt so the JavaScriptCore-only Node-API tests run here too.
+if(NAPI_JAVASCRIPT_ENGINE STREQUAL "JavaScriptCore")
+    target_compile_definitions(UnitTestsJNI PRIVATE JSRUNTIMEHOST_NAPI_ENGINE_JAVASCRIPTCORE)
+endif()
+
 target_compile_definitions(UnitTestsJNI PRIVATE JSRUNTIMEHOST_PLATFORM="${JSRUNTIMEHOST_PLATFORM}")
 target_compile_definitions(UnitTestsJNI PRIVATE NAPI_JAVASCRIPT_ENGINE="${NAPI_JAVASCRIPT_ENGINE}")
 target_compile_definitions(UnitTestsJNI PRIVATE ARCANA_TEST_HOOKS)
diff --git a/Tests/UnitTests/CMakeLists.txt b/Tests/UnitTests/CMakeLists.txt
index f3676d7d..bdeb42e8 100644
--- a/Tests/UnitTests/CMakeLists.txt
+++ b/Tests/UnitTests/CMakeLists.txt
@@ -60,6 +60,13 @@ if(NAPI_JAVASCRIPT_ENGINE STREQUAL "JSI")
     target_compile_definitions(UnitTests PRIVATE JSRUNTIMEHOST_NAPI_ENGINE_JSI)
 endif()
 
+# The JavaScriptCore backend follows Node's ToObject coercion of property receivers and its
+# reference rules for primitives; other engines diverge (Chakra references any value, some reject
+# a primitive receiver outright), so the tests that pin those semantics build for it only.
+if(NAPI_JAVASCRIPT_ENGINE STREQUAL "JavaScriptCore")
+    target_compile_definitions(UnitTests PRIVATE JSRUNTIMEHOST_NAPI_ENGINE_JAVASCRIPTCORE)
+endif()
+
 target_link_libraries(UnitTests
     PRIVATE AppRuntime
     PRIVATE Console
diff --git a/Tests/UnitTests/Shared/Shared.cpp b/Tests/UnitTests/Shared/Shared.cpp
index 1c7e9ff7..90b7bdbf 100644
--- a/Tests/UnitTests/Shared/Shared.cpp
+++ b/Tests/UnitTests/Shared/Shared.cpp
@@ -1,5 +1,6 @@
 #include "Shared.h"
 #include <Babylon/AppRuntime.h>
+#include <napi/env.h>
 #include <Babylon/ScriptLoader.h>
 #include <Babylon/Polyfills/AbortController.h>
 #include <Babylon/Polyfills/Console.h>
@@ -829,6 +830,148 @@ TEST(NodeApi, AdjacentEscapableScopesEscapeIndependently)
 
 #endif
 
+// The V8JSI shim surfaces a script `throw` of a primitive as a jsi::JSError rather than a
+// Napi::Error, which AppRuntime's dispatch treats as fatal, so this case cannot run there.
+#if !defined(JSRUNTIMEHOST_NAPI_ENGINE_JSI)
+TEST(NodeApi, PrimitiveExceptionSurvivesNativeCatch)
+{
+    // Regression: a JavaScript `throw` of a non-object reaches node-addon-api's
+    // Napi::Error, which wraps the pending exception with napi_create_reference.
+    // The JavaScriptCore backend handed the primitive to a JSObject* entry point
+    // (a reinterpret_cast whose assert is compiled out) and tripped a
+    // RELEASE_ASSERT inside the engine. Its execution-time-limit termination
+    // exception is such a string, so terminating a busy worker killed the
+    // process.
+    Babylon::AppRuntime runtime{};
+
+    std::promise<bool> caught;
+    std::promise<bool> runtimeStillWorks;
+
+    runtime.Dispatch([&caught, &runtimeStillWorks](Napi::Env env) {
+        bool sawError{false};
+        try
+        {
+            // Napi::Eval rather than Env::RunScript: the JSI shim has no RunScript and
+            // Hermes only implements the 3-argument napi_run_script.
+            Napi::Eval(env, "throw 'plain text';", "primitive-exception.js");
+        }
+        catch (const Napi::Error& error)
+        {
+            // Must be callable whether the backend held the string itself or
+            // wrapped it in an object.
+            (void)error.Message();
+            sawError = true;
+        }
+        caught.set_value(sawError);
+
+        const auto sum = Napi::Eval(env, "1 + 1", "primitive-exception.js");
+        runtimeStillWorks.set_value(sum.IsNumber() && sum.As<Napi::Number>().Int32Value() == 2);
+    });
+
+    EXPECT_TRUE(caught.get_future().get());
+    EXPECT_TRUE(runtimeStillWorks.get_future().get());
+}
+#endif
+
+#if defined(JSRUNTIMEHOST_NAPI_ENGINE_JAVASCRIPTCORE)
+TEST(NodeApi, PropertyAccessCoercesPrimitiveReceiver)
+{
+    // Node coerces the receiver of the property entry points with ToObject: the
+    // "length" of a string reads through its wrapper, while null and undefined
+    // report napi_object_expected and leave the TypeError pending. The
+    // JavaScriptCore backend used to reinterpret the primitive as an object.
+    Babylon::AppRuntime runtime{};
+
+    std::promise<bool> coerced;
+    std::promise<bool> rejected;
+    std::promise<bool> calledOnPrimitive;
+
+    runtime.Dispatch([&coerced, &rejected, &calledOnPrimitive](Napi::Env env) {
+        napi_env nenv{env};
+
+        napi_value text{Napi::String::New(env, "hello")};
+        napi_value length{};
+        int32_t value{};
+        coerced.set_value(
+            napi_get_named_property(nenv, text, "length", &length) == napi_ok &&
+            napi_get_value_int32(nenv, length, &value) == napi_ok &&
+            value == 5);
+
+        napi_value undefined{env.Undefined()};
+        napi_value ignored{};
+        const napi_status status{napi_get_named_property(nenv, undefined, "length", &ignored)};
+        bool pending{false};
+        napi_is_exception_pending(nenv, &pending);
+        napi_value exception{};
+        napi_get_and_clear_last_exception(nenv, &exception);
+        rejected.set_value(status == napi_object_expected && pending);
+
+        // A primitive receiver is boxed for napi_call_function as well.
+        napi_value toUpperCase{env.Global().Get("String").As<Napi::Object>().Get("prototype").As<Napi::Object>().Get("toUpperCase")};
+        napi_value upper{};
+        calledOnPrimitive.set_value(
+            napi_call_function(nenv, text, toUpperCase, 0, nullptr, &upper) == napi_ok &&
+            Napi::Value(env, upper).As<Napi::String>().Utf8Value() == "HELLO");
+    });
+
+    EXPECT_TRUE(coerced.get_future().get());
+    EXPECT_TRUE(rejected.get_future().get());
+    EXPECT_TRUE(calledOnPrimitive.get_future().get());
+}
+
+TEST(NodeApi, ReferencesToPrimitivesFollowNode)
+{
+    // Symbols have always been referenceable, and a weak reference keeps
+    // resolving while the symbol is alive. Other primitives are refused before
+    // Node-API 10; from 10 on they are held while the count is positive and
+    // released at zero, when the value reads back as NULL.
+    Babylon::AppRuntime runtime{};
+
+    std::promise<bool> primitivesHandled;
+    std::promise<bool> symbolResolves;
+
+    runtime.Dispatch([&primitivesHandled, &symbolResolves](Napi::Env env) {
+        napi_env nenv{env};
+
+        napi_value text{Napi::String::New(env, "held")};
+        napi_ref ref{};
+        const napi_status status{napi_create_reference(nenv, text, 1, &ref)};
+#if NAPI_VERSION >= 10
+        napi_value value{};
+        uint32_t count{1};
+        bool ok{status == napi_ok &&
+            napi_get_reference_value(nenv, ref, &value) == napi_ok &&
+            value != nullptr &&
+            Napi::Value(env, value).As<Napi::String>().Utf8Value() == "held" &&
+            napi_reference_unref(nenv, ref, &count) == napi_ok &&
+            count == 0};
+        value = text;
+        ok = ok &&
+            napi_get_reference_value(nenv, ref, &value) == napi_ok &&
+            value == nullptr &&
+            napi_reference_unref(nenv, ref, &count) == napi_generic_failure &&
+            napi_delete_reference(nenv, ref) == napi_ok;
+        primitivesHandled.set_value(ok);
+#else
+        primitivesHandled.set_value(status == napi_invalid_arg);
+#endif
+
+        napi_value symbol{Napi::Symbol::New(env, "tag")};
+        napi_ref symbolRef{};
+        napi_value resolved{};
+        symbolResolves.set_value(
+            napi_create_reference(nenv, symbol, 0, &symbolRef) == napi_ok &&
+            napi_get_reference_value(nenv, symbolRef, &resolved) == napi_ok &&
+            resolved != nullptr &&
+            Napi::Value(env, resolved).StrictEquals(Napi::Value(env, symbol)) &&
+            napi_delete_reference(nenv, symbolRef) == napi_ok);
+    });
+
+    EXPECT_TRUE(primitivesHandled.get_future().get());
+    EXPECT_TRUE(symbolResolves.get_future().get());
+}
+#endif
+
 int RunTests()
 {
     testing::InitGoogleTest();