diff --git a/src/workerd/api/node/tests/zlib-nodejs-test.js b/src/workerd/api/node/tests/zlib-nodejs-test.js
index a129508f7a1..2dfbe075ded 100644
--- a/src/workerd/api/node/tests/zlib-nodejs-test.js
+++ b/src/workerd/api/node/tests/zlib-nodejs-test.js
@@ -1,6 +1,11 @@
 import assert from 'node:assert';
 import { Buffer } from 'node:buffer';
-import { Readable, Writable, Stream } from 'node:stream';
+import {
+  Readable,
+  Writable,
+  Stream,
+  getDefaultHighWaterMark,
+} from 'node:stream';
 import { inspect, promisify } from 'node:util';
 import { mock } from 'node:test';
 import zlib from 'node:zlib';
@@ -2459,61 +2464,56 @@ export const zlibRandomBytePipes = {
   },
 };
 
-// Node.js tests relevant to zlib
-//
-// - [ ] test-zlib-brotli-16GB.js
-// - [x] test-zlib-convenience-methods.js
-// - [ ] test-zlib-flush-drain.js
-// - [ ] test-zlib-invalid-input-memory.js
-// - [ ] test-zlib-sync-no-event.js
-// - [x] test-zlib-brotli-flush.js
-// - [x] test-zlib-crc32.js
-// - [ ] test-zlib-flush-drain-longblock.js
-// - [ ] test-zlib.js
-// - [x] test-zlib-truncated.js
-// - [ ] test-zlib-brotli-from-brotli.js
-// - [x] test-zlib-create-raw.js
-// - [x] test-zlib-flush-flags.js
-// - [ ] test-zlib-kmaxlength-rangeerror.js
-// - [ ] test-zlib-unused-weak.js
-// - [x] test-zlib-brotli-from-string.js
-// - [x] test-zlib-deflate-constructors.js
-// - [x] test-zlib-flush.js
-// - [x] test-zlib-maxOutputLength.js
-// - [x] test-zlib-unzip-one-byte-chunks.js
-// - [x] test-zlib-brotli.js
-// - [ ] test-zlib-deflate-raw-inherits.js
-// - [ ] test-zlib-flush-write-sync-interleaved.js
-// - [N/A] test-zlib-no-stream.js
-// - [x] test-zlib-write-after-close.js
-// - [ ] test-zlib-brotli-kmaxlength-rangeerror.js
-// - [x] test-zlib-destroy.js
-// - [x] test-zlib-from-concatenated-gzip.js
-// - [x] test-zlib-not-string-or-buffer.js
-// - [x] test-zlib-write-after-end.js
-// - [x] test-zlib-bytes-read.js
-// - [x] test-zlib-destroy-pipe.js
-// - [ ] test-zlib-from-gzip.js
-// - [x] test-zlib-object-write.js
-// - [x] test-zlib-write-after-flush.js
-// - [x] test-zlib-close-after-error.js
-// - [x] test-zlib-dictionary-fail.js
-// - [x] test-zlib-from-gzip-with-trailing-garbage.js
-// - [ ] test-zlib-params.js
-// - [x] test-zlib-zero-byte.js
-// - [x] test-zlib-close-after-write.js
-// - [x] test-zlib-dictionary.js
-// - [x] test-zlib-from-string.js
-// - [x] test-zlib-premature-end.js
-// - [x] test-zlib-zero-windowBits.js
-// - [x] test-zlib-close-in-ondata.js
-// - [x] test-zlib-empty-buffer.js
-// - [x] test-zlib-invalid-arg-value-brotli-compress.js
-// - [x] test-zlib-random-byte-pipes.js
-// - [x] test-zlib-const.js
-// - [x] test-zlib-failed-init.js
-// - [x] test-zlib-invalid-input.js
-// - [x] test-zlib-reset-before-write.js
+// Tests are taken from:
+// https://github.com/nodejs/node/blob/2ef4b15604082abfd7aa26a4619a46802258ff3c/test/parallel/test-zlib-sync-no-event.js
+export const zlibSyncNoEvent = {
+  async test() {
+    const { promise, resolve, reject } = Promise.withResolvers();
+    const message = 'Come on, Fhqwhgads.';
+    const buffer = Buffer.from(message);
+
+    const zipper = new zlib.Gzip();
+    zipper.on('close', reject);
+
+    const zipped = zipper._processChunk(buffer, zlib.constants.Z_FINISH);
+
+    const unzipper = new zlib.Gunzip();
+    unzipper.on('close', reject);
+
+    const unzipped = unzipper._processChunk(zipped, zlib.constants.Z_FINISH);
+    assert.notStrictEqual(zipped.toString(), message);
+    assert.strictEqual(unzipped.toString(), message);
+
+    queueMicrotask(resolve);
+
+    await promise;
+  },
+};
+
+// Tests are taken from:
+// https://github.com/nodejs/node/blob/2ef4b15604082abfd7aa26a4619a46802258ff3c/test/parallel/test-zlib-brotli-16GB.js
+export const zlibBrotli16GB = {
+  async test() {
+    const { promise, resolve } = Promise.withResolvers();
+    const content =
+      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+    const buf = Buffer.from(content, 'hex');
+    const decoder = zlib.createBrotliDecompress();
+
+    decoder.end(buf);
+
+    queueMicrotask(() => {
+      // There is only one chunk in the buffer
+      assert.strictEqual(
+        decoder._readableState.buffer.length,
+        getDefaultHighWaterMark() / (16 * 1024)
+      );
+      resolve();
+    });
+
+    await promise;
+  },
+};
 
 // Large test data is added at the end of the file in order to make the test code itself more readable
 const PSS_VECTORS_JSON = `{