diff --git a/ghost/core/test/e2e-api/members/webhooks.test.js b/ghost/core/test/e2e-api/members/webhooks.test.js
index ab3b158e65c..5c0f44f04fe 100644
--- a/ghost/core/test/e2e-api/members/webhooks.test.js
+++ b/ghost/core/test/e2e-api/members/webhooks.test.js
@@ -176,6 +176,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
         });
@@ -307,6 +308,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
 
@@ -516,6 +518,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
 
@@ -649,6 +652,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature);
 
             const {body} = await adminAgent.get('/members/?search=checkout-webhook-test@email.com');
@@ -747,6 +751,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature);
 
             const {body} = await adminAgent.get('/members/?search=checkout-newsletter-default-test@email.com');
@@ -795,6 +800,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature);
 
             const {body} = await adminAgent.get('/members/?search=checkout-newsletter-test@email.com');
@@ -865,6 +871,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
         });
@@ -993,6 +1000,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
 
@@ -1054,6 +1062,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
 
@@ -1390,6 +1399,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature);
 
             const {body} = await adminAgent.get(`/members/?search=${customer_id}@email.com`);
@@ -1448,6 +1458,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);
 
@@ -1586,6 +1597,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature);
 
             const {body} = await adminAgent.get(`/members/?search=${customer_id}@email.com`);
@@ -1749,6 +1761,7 @@ describe('Members API', function () {
 
             await membersAgent.post('/webhooks/stripe/')
                 .body(webhookPayload)
+                .header('content-type', 'application/json')
                 .header('stripe-signature', webhookSignature)
                 .expectStatus(200);