diff --git a/src/cache/create.ts b/src/cache/create.ts
index 24638170..a84c234b 100644
--- a/src/cache/create.ts
+++ b/src/cache/create.ts
@@ -10,8 +10,6 @@ import type { CacheInstance, CacheProperties } from './cache';
 
 export type CacheOptions = Partial<CacheInstance> & Partial<CacheProperties>;
 
-const symbolKey = Symbol();
-
 /**
  * Apply the caching interceptors for a already created axios instance.
  *
@@ -92,11 +90,8 @@ export function setupCache(
   };
 
   // Apply interceptors
-  axiosCache.requestInterceptor.apply(axiosCache);
-  axiosCache.responseInterceptor.apply(axiosCache);
-
-  // @ts-expect-error - internal only
-  axiosCache[symbolKey] = 1;
+  axiosCache.requestInterceptor.apply();
+  axiosCache.responseInterceptor.apply();
 
   return axiosCache;
 }
@@ -105,13 +100,3 @@ export function setupCache(
 export const useCache = setupCache as unknown as 'use setupCache instead';
 /** @deprecated */
 export const createCache = setupCache as unknown as 'use setupCache instead';
-
-/**
- * Detects if the given parameter has caching enabled. The only way to this return true is
- * by using the {@link setupCache} function.
- *
- * @param axios The axios instance to use
- * @returns True if the axios instance is using the caching interceptor
- */
-export const isAxiosCacheInterceptor = (axios: any): axios is AxiosCacheInstance =>
-  !!axios && !!axios[symbolKey];
diff --git a/test/bundle.test.ts b/test/bundle.test.ts
index 24d6f1b9..9b5cc117 100644
--- a/test/bundle.test.ts
+++ b/test/bundle.test.ts
@@ -1,4 +1,4 @@
-import { isAxiosCacheInterceptor, setupCache } from '../src/cache/create';
+import { setupCache } from '../src/cache/create';
 import { buildMemoryStorage } from '../src/storage/memory';
 import { buildWebStorage } from '../src/storage/web-api';
 
@@ -12,7 +12,6 @@ describe('test bundle imports', () => {
     expect(console.warn).toHaveBeenCalledTimes(1);
 
     expect(bundle.setupCache).toBe(setupCache);
-    expect(bundle.isAxiosCacheInterceptor).toBe(isAxiosCacheInterceptor);
     expect(bundle.buildMemoryStorage).toBe(buildMemoryStorage);
     expect(bundle.buildWebStorage).toBe(buildWebStorage);
 
diff --git a/test/cache/create.test.ts b/test/cache/create.test.ts
index 00dc98a9..3fd3f361 100644
--- a/test/cache/create.test.ts
+++ b/test/cache/create.test.ts
@@ -1,5 +1,5 @@
 import Axios from 'axios';
-import { isAxiosCacheInterceptor, setupCache } from '../../src/cache/create';
+import { setupCache } from '../../src/cache/create';
 
 describe('tests header interpreter', () => {
   it('tests argument composition', () => {
@@ -11,18 +11,4 @@ describe('tests header interpreter', () => {
     expect(withConfig).not.toBeUndefined();
     expect(withConfig.defaults.cache.ttl).toBe(1234);
   });
-
-  it('tests isAxiosCacheInterceptor', () => {
-    expect(isAxiosCacheInterceptor(void 0)).toBe(false);
-    expect(isAxiosCacheInterceptor(1)).toBe(false);
-    expect(isAxiosCacheInterceptor('a')).toBe(false);
-    expect(isAxiosCacheInterceptor({})).toBe(false);
-    expect(isAxiosCacheInterceptor(Axios)).toBe(false);
-    expect(isAxiosCacheInterceptor(() => 0)).toBe(false);
-    expect(isAxiosCacheInterceptor(null)).toBe(false);
-    expect(isAxiosCacheInterceptor(undefined)).toBe(false);
-    expect(isAxiosCacheInterceptor({ a: 1, b: 'a' })).toBe(false);
-
-    expect(isAxiosCacheInterceptor(setupCache(Axios.create()))).toBe(true);
-  });
 });