diff --git a/src/utils.ts b/src/utils.ts
index 68391a950..f27368f40 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -26,10 +26,6 @@ function mergeAppConfig(
     globalProperties: {
       ...configGlobalConfig?.globalProperties,
       ...mountGlobalConfig?.globalProperties
-    },
-    compilerOptions: {
-      ...configGlobalConfig?.compilerOptions,
-      ...mountGlobalConfig?.compilerOptions
     }
   }
 }
diff --git a/tests/features/compat.spec.ts b/tests/features/compat.spec.ts
index c01995daa..9a0b9166d 100644
--- a/tests/features/compat.spec.ts
+++ b/tests/features/compat.spec.ts
@@ -3,13 +3,9 @@ import { mount } from '../../src'
 
 jest.mock('vue', () => mockVue)
 
-const { configureCompat, extend, defineComponent, h, config } = mockVue as any
+const { configureCompat, extend, defineComponent, h } = mockVue as any
 
 describe('@vue/compat build', () => {
-  beforeAll(() => {
-    config.compilerOptions.whitespace = 'condense'
-  })
-
   describe.each(['suppress-warning', false])(
     'when RENDER_FUNCTION compat is %p',
     (RENDER_FUNCTION) => {