diff --git a/.changeset/beige-tomatoes-lay.md b/.changeset/beige-tomatoes-lay.md
new file mode 100644
index 00000000..a8f9ed5c
--- /dev/null
+++ b/.changeset/beige-tomatoes-lay.md
@@ -0,0 +1,5 @@
+---
+'@edge-runtime/jest-environment': major
+---
+
+Disallow access to `Buffer`
diff --git a/packages/jest-environment/src/index.ts b/packages/jest-environment/src/index.ts
index 937e2a77..ad72b217 100644
--- a/packages/jest-environment/src/index.ts
+++ b/packages/jest-environment/src/index.ts
@@ -19,7 +19,6 @@ class EdgeEnvironment implements JestEnvironment<number> {
     const vm = new EdgeVM({
       extend: (context) => {
         context.global = context
-        context.Buffer = Buffer
         return context
       },
       ...((config as any).projectConfig ?? config)?.testEnvironmentOptions,
diff --git a/packages/jest-environment/test/index.test.ts b/packages/jest-environment/test/index.test.ts
index 91fd9ee1..ae27a132 100644
--- a/packages/jest-environment/test/index.test.ts
+++ b/packages/jest-environment/test/index.test.ts
@@ -19,3 +19,7 @@ test('allows to run crypto', async () => {
 test('has EdgeRuntime global', () => {
   expect(EdgeRuntime).toEqual('edge-runtime')
 })
+
+test('does not have access to node global variables', () => {
+  expect(typeof Buffer).toEqual('undefined')
+})