diff --git a/tests/core/test.spec.ts b/tests/core/test.spec.ts
index 8915743..a3d07ad 100644
--- a/tests/core/test.spec.ts
+++ b/tests/core/test.spec.ts
@@ -13,12 +13,12 @@ describe('Transaction Parser Utils', () => {
                             {
                                 accounts: ['acct-1', 'acct-2', 'acct-3'],
                                 data: '0xray-test',
-                                programId: 'hello-there',
+                                programId: new PublicKey("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA"),
                             },
                             {
                                 accounts: ['acct-1', 'acct-2', 'acct-3'],
                                 data: '0xray-test',
-                                programId: 'hello-hyy',
+                                programId: new PublicKey("B9ktH3g7mwgdoDgCgGRim6qeqPcyRVWJueXS12CMpump"),
                             },
                         ],
                     },
@@ -28,8 +28,8 @@ describe('Transaction Parser Utils', () => {
 
             const result = flattenTransactionInstructions(mockTransaction as any);
             expect(result.length).toEqual(2);
-            expect((result as {programId: string}[])[0].programId).toEqual('hello-there');
-            expect((result as {programId: string}[])[0].programId).toEqual('hello-hyy');
+            expect((result as {programId: PublicKey}[])[0].programId.toString()).toEqual("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA");
+            expect((result as {programId: PublicKey}[])[1].programId.toString()).toEqual("B9ktH3g7mwgdoDgCgGRim6qeqPcyRVWJueXS12CMpump");
         });
 
         it('should handle instructions with inner cpi calls', () => {