Update README and some test data references

README.md

@@ -231,7 +231,7 @@ A spend request moves through: **create** → **request approval** → **approve
 **Required fields for create:** `merchant_name`, `merchant_url`, `context`, `amount`. `payment_method_id` is optional — if omitted, your default payment method will be used, or the first eligible one if no default is set.
 
 **Constraints:** `context` must be at least 100 characters; `amount` must not exceed 500000 (cents); `currency` must be a 3-letter ISO code. The user has 10 minutes from when approval is requested to approve. Approved credentials (card or SPT) are valid for 12 hours from spend request creation.
-**Test mode:** Pass `--test` to create testmode credentials (uses test card `4242424242424242`), useful for development and integration testing without real payment methods.
+**Test mode:** Pass `--test` to create a testmode SpendRequest. A testmode SpendRequest will return test payment credentials (e.g test card `4000009990001984`) rather than a real payment credential. Testmode SpendRequests will not charge the underlying payment method of the SpendRequest. This is useful for development and integration testing without real payment methods.
 
 ```bash
 # Update before approval

packages/cli/src/__tests__/cli.test.ts

@@ -703,7 +703,7 @@ describe('production mode', () => {
           brand: 'Visa',
           exp_month: 12,
           exp_year: 2027,
-          number: '4242424242424242',
+          number: '4000009990001984',
         },
       });
 
@@ -720,7 +720,7 @@ describe('production mode', () => {
       expect(request.status).toBe('approved');
       const card = request.card as Record<string, unknown>;
       expect(card.brand).toBe('Visa');
-      expect(card.number).toBe('4242424242424242');
+      expect(card.number).toBe('4000009990001984');
     });
 
     it('returns card with billing_address and valid_until when present', async () => {
@@ -732,7 +732,7 @@ describe('production mode', () => {
           brand: 'Visa',
           exp_month: 12,
           exp_year: 2027,
-          number: '4242424242424242',
+          number: '4000009990001984',
           cvc: '123',
           billing_address: {
             name: 'Jane Doe',
@@ -759,7 +759,7 @@ describe('production mode', () => {
       const request = output[0];
       expect(request.status).toBe('approved');
       const card = request.card as Record<string, unknown>;
-      expect(card.number).toBe('4242424242424242');
+      expect(card.number).toBe('4000009990001984');
       expect(card.valid_until).toBe('2025-06-15T06:13:20Z');
       const billingAddress = card.billing_address as Record<string, unknown>;
       expect(billingAddress.name).toBe('Jane Doe');

packages/cli/src/commands/spend-request/__tests__/spend-request.test.tsx

@@ -200,7 +200,7 @@ describe('spend-request', () => {
       const request = makeSpendRequest({
         card: {
           id: 'card_1',
-          number: '4242424242424242',
+          number: '4000009990001984',
           brand: 'visa',
           exp_month: 12,
           exp_year: 2030,

packages/cli/src/utils/__tests__/credential-output.test.ts

@@ -17,7 +17,7 @@ describe('writeCredentialFile', () => {
 
   it('writes JSON file with 0600 permissions', async () => {
     const filePath = path.join(tmpDir, 'card.json');
-    const data = { number: '4242424242424242', cvc: '123' };
+    const data = { number: '4000009990001984', cvc: '123' };
     const result = await writeCredentialFile(filePath, data, false);
     expect(result).toBe(filePath);
     const contents = JSON.parse(await fs.readFile(filePath, 'utf-8'));

packages/sdk/src/resources/__tests__/spend-request.test.ts

@@ -363,7 +363,7 @@ describe('SpendRequestResource', () => {
           brand: 'Visa',
           exp_month: 12,
           exp_year: 2027,
-          number: '4242424242424242',
+          number: '4000009990001984',
         },
       };
       mockFetchResponse(200, approvedResponse);
@@ -376,7 +376,7 @@ describe('SpendRequestResource', () => {
         brand: 'Visa',
         exp_month: 12,
         exp_year: 2027,
-        number: '4242424242424242',
+        number: '4000009990001984',
       });
     });