diff --git a/package.json b/package.json
index bb613e357..596ad5d57 100644
--- a/package.json
+++ b/package.json
@@ -105,8 +105,10 @@
     "@types/mocha": "^10.0.6",
     "@types/node": "^22.0.0",
     "@types/semver": "^7.3.9",
+    "@types/ungap__structured-clone": "^1.2.0",
     "@typescript-eslint/eslint-plugin": "^8.0.1",
     "@typescript-eslint/parser": "^8.0.1",
+    "@ungap/structured-clone": "^1.2.0",
     "aws-sdk": "^2.1130.0",
     "benny": "^3.7.1",
     "c8": "^10.1.2",
diff --git a/test/_common.ts b/test/_common.ts
index 893dd8e89..5eb4b6ced 100644
--- a/test/_common.ts
+++ b/test/_common.ts
@@ -1,6 +1,12 @@
 import * as gdal from 'gdal-async'
+import structuredClone from '@ungap/structured-clone'
 
 console.log(`GDAL Version: ${gdal.version}, source: ${gdal.bundled ? 'bundled' : 'system library'}`)
+if (!('structuredClone' in globalThis)) {
+  console.log('Using a JS implementation of structuredClone')
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  globalThis.structuredClone = structuredClone as any
+}
 
 // gc tracing
 try {
diff --git a/test/tsconfig.test.json b/test/tsconfig.test.json
index e1676a168..f7d1a8706 100644
--- a/test/tsconfig.test.json
+++ b/test/tsconfig.test.json
@@ -2,6 +2,7 @@
   "compilerOptions": {
     "downlevelIteration": true,
     "strict": true,
-    "strictNullChecks": true
+    "strictNullChecks": true,
+    "esModuleInterop": true
   }
 }