diff --git a/package.json b/package.json
index e831adf..71173c3 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,7 @@
     "eslint-plugin-simple-import-sort": "^7.0.0",
     "eslint-plugin-svelte3": "^3.0.0",
     "husky": "^4.0.9",
-    "jest": "^26.0.1",
+    "jest": "^27.0.6",
     "lint-staged": "^10.0.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.0.1",
@@ -118,6 +118,7 @@
     "setupFilesAfterEnv": [
       "@testing-library/jest-dom/extend-expect"
     ],
+    "testEnvironment": "jsdom",
     "transform": {
       "^.+\\.js$": "babel-jest",
       "^.+\\.svelte$": "svelte-jester",
diff --git a/src/__tests__/multi-base.test.js b/src/__tests__/multi-base.test.js
index ec9307c..4031275 100644
--- a/src/__tests__/multi-base.test.js
+++ b/src/__tests__/multi-base.test.js
@@ -13,8 +13,8 @@ describe('multi-base', () => {
   })
 
   afterAll(() => {
-    treeA.parentNode.removeChild(treeA)
-    treeB.parentNode.removeChild(treeB)
+    treeA = document.createElement('div')
+    treeB = document.createElement('div')
   })
 
   test('container isolates trees from one another', () => {