diff --git a/test/types/TupleKeyTests.test.ts b/test/types/TupleKeyTests.test.ts
index f4760ef..ac260dd 100644
--- a/test/types/TupleKeyTests.test.ts
+++ b/test/types/TupleKeyTests.test.ts
@@ -15,4 +15,17 @@ describe("TupleKey", () => {
 
     expect(`${tupleKey}`).toEqual("150|539");
   });
+
+  it("supports usage as key in object", () => {
+    const tupleKey1 = new TupleKey("1", "2");
+    const tupleKey2 = new TupleKey("3", "4");
+
+    const sampleObject = {
+      [tupleKey1.toString()]: "value1",
+      [tupleKey2.toString()]: "value2",
+    };
+
+    expect(sampleObject[tupleKey1.toString()]).toEqual("value1");
+    expect(sampleObject[(new TupleKey("1", "2")).toString()]).toEqual("value1");
+  });
 });
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