diff --git a/packages/aws-serverless/test/sdk.test.ts b/packages/aws-serverless/test/sdk.test.ts
index 7ab59670cdf2..28b58a830e61 100644
--- a/packages/aws-serverless/test/sdk.test.ts
+++ b/packages/aws-serverless/test/sdk.test.ts
@@ -18,6 +18,7 @@ const mockScope = {
   setTag: jest.fn(),
   setContext: jest.fn(),
   addEventProcessor: jest.fn(),
+  setTransactionName: jest.fn(),
 };
 
 jest.mock('@sentry/node', () => {
@@ -81,12 +82,8 @@ const fakeCallback: Callback = (err, result) => {
 };
 
 function expectScopeSettings() {
-  expect(mockScope.addEventProcessor).toBeCalledTimes(1);
-  // Test than an event processor to add `transaction` is registered for the scope
-  const eventProcessor = mockScope.addEventProcessor.mock.calls[0][0];
-  const event: Event = {};
-  eventProcessor(event);
-  expect(event).toEqual({ transaction: 'functionName' });
+  expect(mockScope.setTransactionName).toBeCalledTimes(1);
+  expect(mockScope.setTransactionName).toBeCalledWith('functionName');
 
   expect(mockScope.setTag).toBeCalledWith('server_name', expect.anything());
 
diff --git a/packages/core/src/scope.ts b/packages/core/src/scope.ts
index 53593314be57..6b1238342ee9 100644
--- a/packages/core/src/scope.ts
+++ b/packages/core/src/scope.ts
@@ -342,12 +342,12 @@ export class Scope {
   }
 
   /**
-   * Sets the transaction name on the scope so that the name of the transaction
-   * (e.g. taken server route or page location) is attached to future events.
+   * Sets the transaction name on the scope so that the name of e.g. taken server route or
+   * the page location is attached to future events.
    *
    * IMPORTANT: Calling this function does NOT change the name of the currently active
-   * span. If you want to change the name of the active span, use `span.updateName()`
-   * instead.
+   * root span. If you want to change the name of the active root span, use
+   * `Sentry.updateSpanName(rootSpan, 'new name')` instead.
    *
    * By default, the SDK updates the scope's transaction name automatically on sensible
    * occasions, such as a page navigation or when handling a new request on the server.