diff --git a/src.ts/_tests/test-hash-typeddata.ts b/src.ts/_tests/test-hash-typeddata.ts
index 5b0a82744..95d675a9d 100644
--- a/src.ts/_tests/test-hash-typeddata.ts
+++ b/src.ts/_tests/test-hash-typeddata.ts
@@ -135,6 +135,15 @@ describe("Tests Typed Data (EIP-712) aliases", function() {
             const encoder = TypedDataEncoder.from(test.types);
             assert.equal(encoder.primaryType, "foo", "primaryType");
             assert.equal(encoder.encodeData("foo", test.data), test.encoded, "encoded");
+
+            const encoderAlias = TypedDataEncoder.from(test.typesAlias);
+            assert.equal(encoderAlias.primaryType, "foo", "primaryType");
+            assert.equal(encoderAlias.encodeData("foo", test.data), test.encoded, "encoded");
+
+            const payload = TypedDataEncoder.getPayload({ }, test.types, test.data);
+            const payloadAlias = TypedDataEncoder.getPayload({ }, test.typesAlias, test.data);
+
+            assert.equal(JSON.stringify(payloadAlias), JSON.stringify(payload), "payload");
         });
     }