diff --git a/packages/browser/src/integrations/breadcrumbs.ts b/packages/browser/src/integrations/breadcrumbs.ts
index 04b6df82d208..ce032f41180e 100644
--- a/packages/browser/src/integrations/breadcrumbs.ts
+++ b/packages/browser/src/integrations/breadcrumbs.ts
@@ -249,7 +249,7 @@ export class Breadcrumbs implements Integration {
           url: string;
           status_code?: number;
         } = {
-          method,
+          method: isString(method) ? method.toUpperCase() : method,
           url,
         };
 
@@ -397,7 +397,7 @@ export class Breadcrumbs implements Integration {
         function(this: SentryWrappedXMLHttpRequest, ...args: any[]): void {
           const url = args[1];
           this.__sentry_xhr__ = {
-            method: args[0],
+            method: isString(args[0]) ? args[0].toUpperCase() : args[0],
             url: args[1],
           };
 
diff --git a/packages/browser/test/integration/suites/breadcrumbs.js b/packages/browser/test/integration/suites/breadcrumbs.js
index 39629efcc81f..03d3e120763c 100644
--- a/packages/browser/test/integration/suites/breadcrumbs.js
+++ b/packages/browser/test/integration/suites/breadcrumbs.js
@@ -32,7 +32,7 @@ describe("breadcrumbs", function() {
     function() {
       return runInSandbox(sandbox, { manual: true }, function() {
         var xhr = new XMLHttpRequest();
-        xhr.open("GET", "/base/subjects/example.json");
+        xhr.open("get", "/base/subjects/example.json");
         xhr.send();
         waitForXHR(xhr, function() {
           Sentry.captureMessage("test");
@@ -87,7 +87,9 @@ describe("breadcrumbs", function() {
 
   it("should record a fetch request", function() {
     return runInSandbox(sandbox, { manual: true }, function() {
-      fetch("/base/subjects/example.json")
+      fetch("/base/subjects/example.json", {
+        method: "Get",
+      })
         .then(
           function() {
             Sentry.captureMessage("test");