diff --git a/src/bun.js/bindings/JSPropertyIterator.cpp b/src/bun.js/bindings/JSPropertyIterator.cpp
index 89e64a8ac88121..c7e3ae8fed8589 100644
--- a/src/bun.js/bindings/JSPropertyIterator.cpp
+++ b/src/bun.js/bindings/JSPropertyIterator.cpp
@@ -45,6 +45,10 @@ extern "C" JSPropertyIterator* Bun__JSPropertyIterator__create(JSC::JSGlobalObje
     auto scope = DECLARE_THROW_SCOPE(vm);
     JSC::PropertyNameArray array(vm, PropertyNameMode::StringsAndSymbols, PrivateSymbolMode::Exclude);
 
+    if (UNLIKELY(object->hasNonReifiedStaticProperties())) {
+        object->reifyAllStaticProperties(globalObject);
+    }
+
 #if OS(WINDOWS)
     if (UNLIKELY(object->type() == JSC::ProxyObjectType)) {
         // Check if we're actually iterating through the JSEnvironmentVariableMap's proxy.
@@ -75,7 +79,7 @@ extern "C" JSPropertyIterator* Bun__JSPropertyIterator__create(JSC::JSGlobalObje
         if (only_non_index_properties) {
             object->getOwnNonIndexPropertyNames(globalObject, array, DontEnumPropertiesMode::Exclude);
         } else {
-            object->getOwnPropertyNames(object, globalObject, array, DontEnumPropertiesMode::Exclude);
+            object->methodTable()->getOwnPropertyNames(object, globalObject, array, DontEnumPropertiesMode::Exclude);
         }
     } else {
         object->getPropertyNames(globalObject, array, DontEnumPropertiesMode::Exclude);
@@ -161,7 +165,7 @@ extern "C" EncodedJSValue Bun__JSPropertyIterator__getNameAndValue(JSPropertyIte
     auto& vm = iter->vm;
     auto scope = DECLARE_THROW_SCOPE(vm);
     PropertySlot slot(object, PropertySlot::InternalMethodType::GetOwnProperty);
-    if (!object->getOwnPropertySlot(object, globalObject, prop, slot)) {
+    if (!object->methodTable()->getOwnPropertySlot(object, globalObject, prop, slot)) {
         return {};
     }
     RETURN_IF_EXCEPTION(scope, {});
diff --git a/test/bun.lockb b/test/bun.lockb
index fb2b70b1f29064..2d9775c983b086 100755
Binary files a/test/bun.lockb and b/test/bun.lockb differ
diff --git a/test/package.json b/test/package.json
index 9c9d51d496c4a6..edc248dadfa608 100644
--- a/test/package.json
+++ b/test/package.json
@@ -20,6 +20,8 @@
     "@remix-run/serve": "2.10.3",
     "@resvg/resvg-js": "2.4.1",
     "@swc/core": "1.3.38",
+    "@testing-library/jest-dom": "6.6.3",
+    "@testing-library/react": "16.1.0",
     "aws-cdk-lib": "2.148.0",
     "axios": "1.6.8",
     "body-parser": "1.20.2",
diff --git a/test/regression/issue/16312.test.ts b/test/regression/issue/16312.test.ts
new file mode 100644
index 00000000000000..15b9019c0d17e4
--- /dev/null
+++ b/test/regression/issue/16312.test.ts
@@ -0,0 +1,13 @@
+import { test, afterEach, expect } from "bun:test";
+import { cleanup } from "@testing-library/react";
+import * as matchers from "@testing-library/jest-dom/matchers";
+
+expect.extend(matchers);
+afterEach(() => {
+  cleanup();
+});
+
+test("expect extended", () => {
+  // @ts-ignore
+  expect(expect.toBeInTheDocument).not.toBe(undefined);
+});