diff --git a/dev-packages/browser-integration-tests/suites/tracing/browserTracingIntegration/reportPageLoaded-streamed/default/test.ts b/dev-packages/browser-integration-tests/suites/tracing/browserTracingIntegration/reportPageLoaded-streamed/default/test.ts
index 706166ef0dc4..3d3d4e69069c 100644
--- a/dev-packages/browser-integration-tests/suites/tracing/browserTracingIntegration/reportPageLoaded-streamed/default/test.ts
+++ b/dev-packages/browser-integration-tests/suites/tracing/browserTracingIntegration/reportPageLoaded-streamed/default/test.ts
@@ -1,11 +1,10 @@
-import { SENTRY_SEGMENT_NAME_SOURCE } from '@sentry/conventions/attributes';
+import { SENTRY_IDLE_SPAN_FINISH_REASON, SENTRY_SEGMENT_NAME_SOURCE } from '@sentry/conventions/attributes';
 import { expect } from '@playwright/test';
 import {
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE,
 } from '@sentry/browser';
-import { SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON } from '@sentry/core';
 import { sentryTest } from '../../../../../utils/fixtures';
 import { shouldSkipTracingTest } from '../../../../../utils/helpers';
 import { getSpanOp, waitForStreamedSpan } from '../../../../../utils/spanUtils';
@@ -30,7 +29,7 @@ sentryTest(
       [SEMANTIC_ATTRIBUTE_SENTRY_SAMPLE_RATE]: expect.objectContaining({ value: 1 }),
       [SENTRY_SEGMENT_NAME_SOURCE]: { type: 'string', value: 'url' },
       [SEMANTIC_ATTRIBUTE_SENTRY_OP]: { type: 'string', value: 'pageload' },
-      [SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]: { type: 'string', value: 'reportPageLoaded' },
+      [SENTRY_IDLE_SPAN_FINISH_REASON]: { type: 'string', value: 'reportPageLoaded' },
     });
 
     // We wait for 2.5 seconds before calling Sentry.reportPageLoaded(). The span starts at navigation start,
diff --git a/dev-packages/browser-integration-tests/suites/tracing/interactions/spans/test.ts b/dev-packages/browser-integration-tests/suites/tracing/interactions/spans/test.ts
index 0f6c7f4d772c..d0d3231f622d 100644
--- a/dev-packages/browser-integration-tests/suites/tracing/interactions/spans/test.ts
+++ b/dev-packages/browser-integration-tests/suites/tracing/interactions/spans/test.ts
@@ -2,12 +2,12 @@ import { expect } from '@playwright/test';
 import {
   SDK_VERSION,
   SEMANTIC_ATTRIBUTE_SENTRY_ENVIRONMENT,
-  SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON,
   SEMANTIC_ATTRIBUTE_SENTRY_OP,
   SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
   SEMANTIC_ATTRIBUTE_SENTRY_SDK_INTEGRATIONS,
 } from '@sentry/core';
 import {
+  SENTRY_IDLE_SPAN_FINISH_REASON,
   SENTRY_SEGMENT_ID,
   SENTRY_SEGMENT_NAME,
   SENTRY_SEGMENT_NAME_SOURCE,
@@ -76,7 +76,7 @@ sentryTest('captures streamed interaction span tree. @firefox', async ({ browser
         type: 'string',
         value: '/index.html',
       },
-      [SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]: {
+      [SENTRY_IDLE_SPAN_FINISH_REASON]: {
         type: 'string',
         value: 'idleTimeout',
       },
diff --git a/packages/core/src/semanticAttributes.ts b/packages/core/src/semanticAttributes.ts
index 8ba796d0ce1b..b67f1f74cd6f 100644
--- a/packages/core/src/semanticAttributes.ts
+++ b/packages/core/src/semanticAttributes.ts
@@ -35,7 +35,10 @@ export const SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN = 'sentry.origin';
  */
 export const SEMANTIC_ATTRIBUTE_SENTRY_STATUS_MESSAGE = 'sentry.status.message';
 
-/** The reason why an idle span finished. */
+/**
+ * The reason why an idle span finished.
+ * @deprecated Use `SENTRY_IDLE_SPAN_FINISH_REASON` from `@sentry/conventions/attributes` instead.
+ */
 export const SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON = 'sentry.idle_span_finish_reason';
 
 /** The unit of a measurement, which may be stored as a TimedEvent. */
diff --git a/packages/core/src/tracing/idleSpan.ts b/packages/core/src/tracing/idleSpan.ts
index c837b9dcccc6..32e23ee357ba 100644
--- a/packages/core/src/tracing/idleSpan.ts
+++ b/packages/core/src/tracing/idleSpan.ts
@@ -1,6 +1,6 @@
+import { SENTRY_IDLE_SPAN_FINISH_REASON } from '@sentry/conventions/attributes';
 import { getClient, getCurrentScope, getIsolationScope } from '../currentScopes';
 import { DEBUG_BUILD } from '../debug-build';
-import { SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON } from '../semanticAttributes';
 import type { Span } from '../types/span';
 import type { StartSpanOptions } from '../types/startSpanOptions';
 import { debug } from '../utils/debug-logger';
@@ -303,8 +303,8 @@ export function startIdleSpan(startSpanOptions: StartSpanOptions, options: Parti
     }
 
     const attributes = spanJSON.data;
-    if (!attributes[SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]) {
-      span.setAttribute(SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON, _finishReason);
+    if (!attributes[SENTRY_IDLE_SPAN_FINISH_REASON]) {
+      span.setAttribute(SENTRY_IDLE_SPAN_FINISH_REASON, _finishReason);
     }
 
     // Set span status to 'ok' if it hasn't been explicitly set to an error status
diff --git a/packages/core/test/lib/tracing/idleSpan.test.ts b/packages/core/test/lib/tracing/idleSpan.test.ts
index d6c49bfb097b..3809db713668 100644
--- a/packages/core/test/lib/tracing/idleSpan.test.ts
+++ b/packages/core/test/lib/tracing/idleSpan.test.ts
@@ -7,7 +7,6 @@ import {
   getDynamicSamplingContextFromSpan,
   getIsolationScope,
   getTraceData,
-  SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON,
   SentryNonRecordingSpan,
   SentrySpan,
   setCurrentClient,
@@ -22,7 +21,11 @@ import type { Event } from '../../../src/types/event';
 import type { Span } from '../../../src/types/span';
 import { getDefaultTestClientOptions, TestClient } from '../../mocks/client';
 import { resetGlobals } from '../../testutils';
-import { SENTRY_SEGMENT_NAME_SOURCE, SENTRY_STATUS_MESSAGE } from '@sentry/conventions/attributes';
+import {
+  SENTRY_IDLE_SPAN_FINISH_REASON,
+  SENTRY_SEGMENT_NAME_SOURCE,
+  SENTRY_STATUS_MESSAGE,
+} from '@sentry/conventions/attributes';
 
 const dsn = 'https://123@sentry.io/42';
 
@@ -517,9 +520,7 @@ describe('startIdleSpan', () => {
     vi.runOnlyPendingTimers();
 
     expect(beforeSendTransaction).toHaveBeenCalledTimes(1);
-    expect(transaction?.contexts?.trace?.data?.[SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual(
-      'externalFinish',
-    );
+    expect(transaction?.contexts?.trace?.data?.[SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual('externalFinish');
   });
 
   it('sets finish reason when span ends', () => {
@@ -538,9 +539,7 @@ describe('startIdleSpan', () => {
     vi.runOnlyPendingTimers();
 
     expect(beforeSendTransaction).toHaveBeenCalledTimes(1);
-    expect(transaction?.contexts?.trace?.data?.[SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual(
-      'idleTimeout',
-    );
+    expect(transaction?.contexts?.trace?.data?.[SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual('idleTimeout');
   });
 
   it('sets finish reason when span ends via expired heartbeat timeout', () => {
@@ -559,9 +558,7 @@ describe('startIdleSpan', () => {
     vi.runOnlyPendingTimers();
 
     expect(beforeSendTransaction).toHaveBeenCalledTimes(1);
-    expect(transaction?.contexts?.trace?.data?.[SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual(
-      'heartbeatFailed',
-    );
+    expect(transaction?.contexts?.trace?.data?.[SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual('heartbeatFailed');
   });
 
   it('sets finish reason when span ends via final timeout', () => {
@@ -589,9 +586,7 @@ describe('startIdleSpan', () => {
     vi.runOnlyPendingTimers();
 
     expect(beforeSendTransaction).toHaveBeenCalledTimes(1);
-    expect(transaction?.contexts?.trace?.data?.[SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual(
-      'finalTimeout',
-    );
+    expect(transaction?.contexts?.trace?.data?.[SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual('finalTimeout');
   });
 
   it('uses finish reason set outside when span ends', () => {
@@ -606,14 +601,12 @@ describe('startIdleSpan', () => {
     client.init();
 
     const span = startIdleSpan({ name: 'foo' });
-    span.setAttribute(SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON, 'custom reason');
+    span.setAttribute(SENTRY_IDLE_SPAN_FINISH_REASON, 'custom reason');
     startSpan({ name: 'inner' }, () => {});
     vi.runOnlyPendingTimers();
 
     expect(beforeSendTransaction).toHaveBeenCalledTimes(1);
-    expect(transaction?.contexts?.trace?.data?.[SEMANTIC_ATTRIBUTE_SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual(
-      'custom reason',
-    );
+    expect(transaction?.contexts?.trace?.data?.[SENTRY_IDLE_SPAN_FINISH_REASON]).toEqual('custom reason');
   });
 
   describe('idleTimeout', () => {