diff --git a/ReactCommon/jsi/jsi/test/testlib.cpp b/ReactCommon/jsi/jsi/test/testlib.cpp
index 996c2cb614a727..8cf831d34f7b84 100644
--- a/ReactCommon/jsi/jsi/test/testlib.cpp
+++ b/ReactCommon/jsi/jsi/test/testlib.cpp
@@ -394,6 +394,23 @@ TEST_P(JSITest, HostObjectTest) {
                    .getBool());
 }
 
+TEST_P(JSITest, HostObjectProtoTest) {
+  class ProtoHostObject : public HostObject {
+    Value get(Runtime& rt, const PropNameID&) override {
+      return String::createFromAscii(rt, "phoprop");
+    }
+  };
+
+  rt.global().setProperty(
+      rt,
+      "pho",
+      Object::createFromHostObject(rt, std::make_shared<ProtoHostObject>()));
+
+  EXPECT_EQ(
+      eval("({__proto__: pho})[Symbol.toPrimitive]").getString(rt).utf8(rt),
+      "phoprop");
+}
+
 TEST_P(JSITest, ArrayTest) {
   eval("x = {1:2, '3':4, 5:'six', 'seven':['eight', 'nine']}");