diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9ae01c0f..dac4f5d8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -30,7 +30,7 @@ jobs:
           deno-version: ${{ matrix.deno-version }}
 
       - name: Set NATS Server Version
-        run: echo "NATS_VERSION=v2.10.1" >> $GITHUB_ENV
+        run: echo "NATS_VERSION=v2.10.3" >> $GITHUB_ENV
 
       # this here because dns seems to be wedged on gha
 #      - name: Add hosts to /etc/hosts
diff --git a/jetstream/tests/consumers_test.ts b/jetstream/tests/consumers_test.ts
index 455ffd15..21e6f339 100644
--- a/jetstream/tests/consumers_test.ts
+++ b/jetstream/tests/consumers_test.ts
@@ -52,6 +52,7 @@ import {
 } from "../consumer.ts";
 import { deadline } from "../../nats-base-client/util.ts";
 import { syncIterator } from "../../nats-base-client/core.ts";
+import { setupStreamAndConsumer } from "../../examples/jetstream/util.ts";
 
 Deno.test("consumers - min supported server", async () => {
   const { ns, nc } = await setup(jetstreamServerConf({}));
@@ -277,32 +278,20 @@ Deno.test("consumers - fetch exactly messages", async () => {
 });
 
 Deno.test("consumers - consume", async () => {
-  const { ns, nc } = await setup(jetstreamServerConf({
-    jetstream: {
-      max_memory_store: 1024 * 1024 * 1024,
-    },
-  }));
-
-  const count = 50_000;
-  const conf = await memStream(nc, count, 0, 5000);
+  const { ns, nc } = await setup(jetstreamServerConf());
 
-  const jsm = await nc.jetstreamManager();
-  await jsm.consumers.add(conf.stream, {
-    durable_name: "b",
-    ack_policy: AckPolicy.Explicit,
-  });
+  const count = 1000;
+  const { stream, consumer } = await setupStreamAndConsumer(nc, count);
 
+  const js = nc.jetstream({ timeout: 30_000 });
+  const c = await js.consumers.get(stream, consumer);
+  const ci = await c.info();
+  assertEquals(ci.num_pending, count);
   const start = Date.now();
-  const js = nc.jetstream();
-  const consumer = await js.consumers.get(conf.stream, "b");
-  assertEquals((await consumer.info(true)).num_pending, count);
-  const iter = await consumer.consume({
-    expires: 10_000,
-    max_messages: 50_000,
-  });
+  const iter = await c.consume({ expires: 2_000, max_messages: 10 });
   for await (const m of iter) {
     m.ack();
-    if (m.seq === count) {
+    if (m.info.pending === 0) {
       const millis = Date.now() - start;
       console.log(
         `consumer: ${millis}ms - ${count / (millis / 1000)} msgs/sec`,
@@ -312,33 +301,23 @@ Deno.test("consumers - consume", async () => {
   }
   assertEquals(iter.getReceived(), count);
   assertEquals(iter.getProcessed(), count);
-  assertEquals((await consumer.info()).num_pending, 0);
+  assertEquals((await c.info()).num_pending, 0);
   await cleanup(ns, nc);
 });
 
 Deno.test("consumers - consume callback rejects iter", async () => {
-  const { ns, nc } = await setup(jetstreamServerConf({
-    jetstream: {
-      max_memory_store: 1024 * 1024 * 1024,
-    },
-  }));
-
-  const conf = await memStream(nc, 0);
-  const jsm = await nc.jetstreamManager();
-  await jsm.consumers.add(conf.stream, {
-    durable_name: "b",
-    ack_policy: AckPolicy.Explicit,
-  });
-
+  const { ns, nc } = await setup(jetstreamServerConf());
+  const { stream, consumer } = await setupStreamAndConsumer(nc, 0);
   const js = nc.jetstream();
-  const consumer = await js.consumers.get(conf.stream, "b");
-  const iter = await consumer.consume({
-    expires: 10_000,
-    max_messages: 50_000,
+  const c = await js.consumers.get(stream, consumer);
+  const iter = await c.consume({
+    expires: 5_000,
+    max_messages: 10_000,
     callback: (m) => {
       m.ack();
     },
   });
+
   await assertRejects(
     async () => {
       for await (const _o of iter) {
@@ -361,39 +340,6 @@ Deno.test("consumers - fetch heartbeats", async () => {
   await consumerHbTest(true);
 });
 
-async function memStream(
-  nc: NatsConnection,
-  msgs = 1000,
-  size = 0,
-  batch = 10000,
-): Promise<{ millis: number; stream: string; subj: string }> {
-  const jsm = await nc.jetstreamManager();
-  const stream = nuid.next();
-  const subj = nuid.next();
-  await jsm.streams.add({
-    name: stream,
-    subjects: [subj],
-    storage: StorageType.Memory,
-  });
-  const payload = new Uint8Array(size);
-
-  const js = nc.jetstream();
-  const start = Date.now();
-  const buf: Promise<PubAck>[] = [];
-  for (let i = 0; i < msgs; i++) {
-    buf.push(js.publish(subj, payload));
-    if (buf.length === batch) {
-      await Promise.all(buf);
-      buf.length = 0;
-    }
-  }
-  if (buf.length) {
-    await Promise.all(buf);
-    buf.length = 0;
-  }
-  return { millis: Date.now() - start, subj, stream };
-}
-
 /**
  * Setup a cluster that has N nodes with the first node being just a connection
  * server - rest are JetStream - min number of servers is 3
diff --git a/jetstream/tests/objectstore_test.ts b/jetstream/tests/objectstore_test.ts
index 3d1f24c7..86a031d1 100644
--- a/jetstream/tests/objectstore_test.ts
+++ b/jetstream/tests/objectstore_test.ts
@@ -853,6 +853,7 @@ Deno.test("objectstore - hashtests", async () => {
     const oi = await os.put(
       { name: t.hash, options: { max_chunk_size: 9 } },
       rs.stream(),
+      { timeout: 20_000 },
     );
     assertEquals(oi.digest, `${digestType}${t.hash}`);
   }
diff --git a/tests/basics_test.ts b/tests/basics_test.ts
index 3080fc7e..05827d80 100644
--- a/tests/basics_test.ts
+++ b/tests/basics_test.ts
@@ -1175,15 +1175,9 @@ Deno.test("basics - initial connect error", async () => {
 Deno.test("basics - close promise resolves", async () => {
   const ns = await NatsServer.start();
   const nc = await connect({ port: ns.port, reconnect: false });
-  setTimeout(() => {
-    ns.stop();
-  });
-
-  await nc.closed().then((err) => {
-    assertEquals(err, undefined);
-  }).catch((err) => {
-    fail(err);
-  });
+  const results = await Promise.all([nc.closed(), nc.close()]);
+  assertEquals(results[0], undefined);
+  await ns.stop();
 });
 
 Deno.test("basics - inbox prefixes cannot have wildcards", async () => {
diff --git a/tests/heartbeats_test.ts b/tests/heartbeats_test.ts
index 5e1502a1..9bebcf1e 100644
--- a/tests/heartbeats_test.ts
+++ b/tests/heartbeats_test.ts
@@ -66,8 +66,10 @@ Deno.test("heartbeat - timers fire", async () => {
   await delay(400);
   assert(hb.timer);
   hb.cancel();
+  // we can have a timer still running here - we need to wait for lag
+  await delay(50);
   assertEquals(hb.timer, undefined);
-  assert(status.length >= 3, `status ${status.length} >= 3`);
+  assert(status.length >= 2, `status ${status.length} >= 2`);
   assertEquals(status[0].type, DebugEvents.PingTimer);
 });
 
@@ -82,7 +84,6 @@ Deno.test("heartbeat - errors fire on missed maxOut", async () => {
 
   const hb = new Heartbeat(ph, 100, 3);
   hb._schedule();
-
   await disconnect;
   assertEquals(hb.timer, undefined);
   assert(status.length >= 7, `${status.length} >= 7`);
@@ -99,7 +100,7 @@ Deno.test("heartbeat - recovers from missed", async () => {
 
   const hb = new Heartbeat(ph, 100, 3);
   hb._schedule();
-  await delay(800);
+  await delay(850);
   hb.cancel();
   assertEquals(hb.timer, undefined);
   assert(status.length >= 6, `${status.length} >= 6`);
diff --git a/tests/idleheartbeats_test.ts b/tests/idleheartbeats_test.ts
index 48dc722a..e6302b29 100644
--- a/tests/idleheartbeats_test.ts
+++ b/tests/idleheartbeats_test.ts
@@ -102,8 +102,8 @@ Deno.test("idleheartbeat - timeout autocancel", async () => {
   // and resource leaks for a timer if not cleared.
 
   await d;
-  assert(h.count >= 7);
   assertEquals(h.cancelAfter, 2000);
   assertEquals(h.timer, 0);
   assertEquals(h.autoCancelTimer, 0);
+  assert(h.count >= 7, `${h.count} >= 7`);
 });
diff --git a/tests/mrequest_test.ts b/tests/mrequest_test.ts
index d6a3aa9f..67cb74fb 100644
--- a/tests/mrequest_test.ts
+++ b/tests/mrequest_test.ts
@@ -101,7 +101,7 @@ async function requestManyJitter(noMux = false): Promise<void> {
     }
   }
   const time = Date.now() - start;
-  assert(500 > time);
+  assert(1000 > time);
   assertEquals(iter.getProcessed(), 10);
   await cleanup(ns, nc);
 }
diff --git a/tests/reconnect_test.ts b/tests/reconnect_test.ts
index 1150f84b..2a858ac2 100644
--- a/tests/reconnect_test.ts
+++ b/tests/reconnect_test.ts
@@ -186,7 +186,7 @@ Deno.test("reconnect - indefinite reconnects", async () => {
   await srv.stop();
   await lock;
   await srv.stop();
-  assert(reconnects > 5);
+  assert(reconnects >= 5, `${reconnects} >= 5`);
   assert(reconnect);
   assertEquals(disconnects, 1);
 });
@@ -334,6 +334,9 @@ Deno.test("reconnect - close stops reconnects", async () => {
       // the promise will reject if deadline exceeds
       fail(err);
     });
+  // await some more, because the close could have a timer pending that
+  // didn't complete flapping the test on resource leak
+  await delay(750);
 });
 
 Deno.test("reconnect - stale connections don't close", async () => {