diff --git a/integration-tests/tests/src/tests/serialization.ts b/integration-tests/tests/src/tests/serialization.ts
index 51fd6b3727..6b242d12ba 100755
--- a/integration-tests/tests/src/tests/serialization.ts
+++ b/integration-tests/tests/src/tests/serialization.ts
@@ -144,7 +144,7 @@ describe("toJSON functionality", () => {
       this.birthdaysSerialized.dict.grandparent = this.birthdaysSerialized;
 
       // Define the structures for the common test suite.
-      this.this.commonTests = {
+      this.commonTests = {
         Object: {
           type: Realm.Object,
           subject: p1,
@@ -164,7 +164,7 @@ describe("toJSON functionality", () => {
     });
   });
   describe(`common tests`, () => {
-    for (const name in commonTestsTypes) {
+    for (const name of commonTestsTypes) {
       describe(`with Realm.${name}`, () => {
         it("implements toJSON", function (this: TestContext) {
           const test = this.commonTests[name];
diff --git a/vendor/realm-core b/vendor/realm-core
index f5cfe3de10..5da7744b40 160000
--- a/vendor/realm-core
+++ b/vendor/realm-core
@@ -1 +1 @@
-Subproject commit f5cfe3de10e425d0f475a4691b20b160d64e3d2a
+Subproject commit 5da7744b4056ad185c025bccf0924f17f73f7a91