diff --git a/packages/react-native/ReactCommon/jsi/jsi/test/JSIDynamicTest.cpp b/packages/react-native/ReactCommon/jsi/jsi/test/JSIDynamicTest.cpp
new file mode 100644
index 000000000000..e23cedbb16fa
--- /dev/null
+++ b/packages/react-native/ReactCommon/jsi/jsi/test/JSIDynamicTest.cpp
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include <jsi/JSIDynamic.h>
+
+#include <gtest/gtest.h>
+#include <jsi/test/testlib.h>
+
+using namespace facebook::jsi;
+
+class JSIDynamicTest : public JSITestBase {};
+
+TEST_P(JSIDynamicTest, testValueFromDynamicConvertsNestedCollections) {
+  folly::dynamic input = folly::dynamic::object("nullValue", nullptr)(
+      "enabled", true)("count", 42)("ratio", 1.5)(
+      "children",
+      folly::dynamic::array(
+          folly::dynamic::object("name", "first")(
+              "values", folly::dynamic::array(3, 5)),
+          folly::dynamic::object("name", "second")("active", false)))(
+      "metadata",
+      folly::dynamic::object(7, "numeric key")(false, "unsupported key"));
+
+  Object result = valueFromDynamic(rt, input).getObject(rt);
+
+  EXPECT_TRUE(result.getProperty(rt, "nullValue").isNull());
+  EXPECT_TRUE(result.getProperty(rt, "enabled").getBool());
+  EXPECT_EQ(result.getProperty(rt, "count").getNumber(), 42);
+  EXPECT_EQ(result.getProperty(rt, "ratio").getNumber(), 1.5);
+
+  Array children = result.getPropertyAsObject(rt, "children").getArray(rt);
+  ASSERT_EQ(children.size(rt), 2);
+  Object first = children.getValueAtIndex(rt, 0).getObject(rt);
+  EXPECT_EQ(first.getProperty(rt, "name").getString(rt).utf8(rt), "first");
+  Array values = first.getPropertyAsObject(rt, "values").getArray(rt);
+  ASSERT_EQ(values.size(rt), 2);
+  EXPECT_EQ(values.getValueAtIndex(rt, 0).getNumber(), 3);
+  EXPECT_EQ(values.getValueAtIndex(rt, 1).getNumber(), 5);
+
+  Object second = children.getValueAtIndex(rt, 1).getObject(rt);
+  EXPECT_EQ(second.getProperty(rt, "name").getString(rt).utf8(rt), "second");
+  EXPECT_FALSE(second.getProperty(rt, "active").getBool());
+
+  Object metadata = result.getPropertyAsObject(rt, "metadata");
+  EXPECT_EQ(
+      metadata.getProperty(rt, "7").getString(rt).utf8(rt), "numeric key");
+  EXPECT_EQ(metadata.getPropertyNames(rt).size(rt), 1);
+}
+
+TEST_P(JSIDynamicTest, testDynamicFromValueConvertsNestedCollections) {
+  Value input = eval(
+      "({left: [{id: 1}, {id: 2}], "
+      "right: {enabled: true, label: 'ready'}, value: 2.25})");
+  folly::dynamic expected = folly::dynamic::object(
+      "left",
+      folly::dynamic::array(
+          folly::dynamic::object("id", 1.0),
+          folly::dynamic::object("id", 2.0)))(
+      "right", folly::dynamic::object("enabled", true)("label", "ready"))(
+      "value", 2.25);
+
+  folly::dynamic result = dynamicFromValue(rt, input);
+
+  EXPECT_EQ(result, expected);
+}
+
+TEST_P(JSIDynamicTest, testDynamicFromValueNormalizesAndFiltersProperties) {
+  Value input = eval(
+      "({keep: 7, drop: 8, missing: undefined, "
+      "callback: function() {}, items: [undefined, 'ok']})");
+  folly::dynamic expected = folly::dynamic::object("keep", 7.0)(
+      "callback", nullptr)("items", folly::dynamic::array(nullptr, "ok"));
+
+  folly::dynamic result = dynamicFromValue(
+      rt, input, [](const std::string& key) { return key == "drop"; });
+
+  EXPECT_EQ(result, expected);
+}
+
+TEST_P(JSIDynamicTest, testDynamicFromValueRejectsUnsupportedValues) {
+  auto expectConversionError = [&](const char* expression,
+                                   const char* expectedMessage) {
+    try {
+      dynamicFromValue(rt, eval(expression));
+      FAIL() << "Expected conversion to throw for " << expression;
+    } catch (const JSError& error) {
+      EXPECT_NE(
+          std::string(error.what()).find(expectedMessage), std::string::npos)
+          << error.what();
+    }
+  };
+
+  expectConversionError(
+      "(function() {})", "JS Functions are not convertible to dynamic");
+  expectConversionError("1n", "JS BigInts are not convertible to dynamic");
+  expectConversionError(
+      "Symbol('token')", "JS Symbols are not convertible to dynamic");
+}
+
+TEST_P(JSIDynamicTest, testDynamicFromValueHandlesDeeplyNestedObjects) {
+  constexpr size_t kDepth = 25000;
+  std::string expression =
+      "(function() { let head = {}; let node = head; "
+      "for (let i = 0; i < " +
+      std::to_string(kDepth) +
+      "; ++i) { node.next = {}; node = node.next; } "
+      "node.value = true; return head; })()";
+
+  folly::dynamic result = dynamicFromValue(rt, eval(expression.c_str()));
+
+  folly::dynamic* current = &result;
+  size_t depth = 0;
+  while (folly::dynamic* next = current->get_ptr("next")) {
+    current = next;
+    ++depth;
+  }
+  EXPECT_EQ(depth, kDepth);
+  EXPECT_TRUE((*current)["value"].getBool());
+
+  while (folly::dynamic* next = result.get_ptr("next")) {
+    folly::dynamic child = std::move(*next);
+    result = std::move(child);
+  }
+}
+
+INSTANTIATE_TEST_SUITE_P(
+    Runtimes,
+    JSIDynamicTest,
+    ::testing::ValuesIn(runtimeGenerators()));