diff --git a/.changeset/curvy-pillows-compete.md b/.changeset/curvy-pillows-compete.md
new file mode 100644
index 0000000000..e8ecc922dc
--- /dev/null
+++ b/.changeset/curvy-pillows-compete.md
@@ -0,0 +1,5 @@
+---
+'@whatwg-node/fetch': patch
+---
+
+Bump Undici
diff --git a/package.json b/package.json
index 55486244f2..1339610190 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "ci:lint": "eslint --ext .ts . --output-file eslint_report.json --format json",
     "prettier": "prettier --ignore-path .gitignore --ignore-path .prettierignore --write --list-different .",
     "prettier:check": "prettier --ignore-path .gitignore --ignore-path .prettierignore --check .",
-    "test": "jest --detectOpenHandles --detectLeaks",
+    "test": "jest --detectOpenHandles --detectLeaks --logHeapUsage --runInBand",
     "prerelease": "yarn build",
     "prerelease-canary": "yarn build",
     "release": "changeset publish"
diff --git a/packages/fetch/package.json b/packages/fetch/package.json
index f4b8807a8e..c0579650a7 100644
--- a/packages/fetch/package.json
+++ b/packages/fetch/package.json
@@ -24,7 +24,7 @@
     "form-data-encoder": "^1.7.1",
     "formdata-node": "^4.3.1",
     "node-fetch": "^2.6.7",
-    "undici": "^5.8.0",
+    "undici": "^5.10.0",
     "web-streams-polyfill": "^3.2.0"
   },
   "publishConfig": {
diff --git a/packages/server/CHANGELOG.md b/packages/server/CHANGELOG.md
index 0b86e6f0ff..678f0c4f80 100644
--- a/packages/server/CHANGELOG.md
+++ b/packages/server/CHANGELOG.md
@@ -70,8 +70,8 @@
 
   ```ts
   createServerAdapter(req => {
-    return new Response(`I got ${req.url}`);
-  });
+    return new Response(`I got ${req.url}`)
+  })
   ```
 
   Breaking Changes;
diff --git a/packages/server/test/node.spec.ts b/packages/server/test/node.spec.ts
index efffa67305..3c3ecc84d8 100644
--- a/packages/server/test/node.spec.ts
+++ b/packages/server/test/node.spec.ts
@@ -21,7 +21,7 @@ describe('Node Specific Cases', () => {
     const serverAdapter = createServerAdapter(() => {
       return undefined as any;
     });
-    server.on('request', serverAdapter);
+    server.once('request', serverAdapter);
     const response = await fetch(url);
     await response.text();
     expect(response.status).toBe(404);
@@ -39,7 +39,7 @@ describe('Node Specific Cases', () => {
         status: 204,
       });
     });
-    server.on('request', serverAdapter);
+    server.once('request', serverAdapter);
     const response$ = fetch(url);
     const response = await response$;
     await response.text();
@@ -60,7 +60,7 @@ describe('Node Specific Cases', () => {
       foo: string;
     }>(handleRequest);
     const additionalCtx = { foo: 'bar' };
-    server.on('request', (...args) => serverAdapter(...args, additionalCtx));
+    server.once('request', (...args) => serverAdapter(...args, additionalCtx));
     const response = await fetch(url);
     await response.text();
     expect(handleRequest).toHaveBeenCalledWith(expect.anything(), expect.objectContaining(additionalCtx));
@@ -80,7 +80,7 @@ describe('Node Specific Cases', () => {
           })
         )
     );
-    server.on('request', serverAdapter);
+    server.once('request', serverAdapter);
     const abortCtrl = new AbortController();
     const response = await fetch(url, {
       signal: abortCtrl.signal,
diff --git a/yarn.lock b/yarn.lock
index 93857ed576..a047658370 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5796,10 +5796,10 @@ unbox-primitive@^1.0.2:
     has-symbols "^1.0.3"
     which-boxed-primitive "^1.0.2"
 
-undici@^5.8.0:
-  version "5.8.0"
-  resolved "https://registry.yarnpkg.com/undici/-/undici-5.8.0.tgz#dec9a8ccd90e5a1d81d43c0eab6503146d649a4f"
-  integrity sha512-1F7Vtcez5w/LwH2G2tGnFIihuWUlc58YidwLiCv+jR2Z50x0tNXpRRw7eOIJ+GvqCqIkg9SB7NWAJ/T9TLfv8Q==
+undici@^5.10.0:
+  version "5.10.0"
+  resolved "https://registry.yarnpkg.com/undici/-/undici-5.10.0.tgz#dd9391087a90ccfbd007568db458674232ebf014"
+  integrity sha512-c8HsD3IbwmjjbLvoZuRI26TZic+TSEe8FPMLLOkN1AfYRhdjnKBU6yL+IwcSCbdZiX4e5t0lfMDLDCqj4Sq70g==
 
 unicode-canonical-property-names-ecmascript@^2.0.0:
   version "2.0.0"