diff --git a/test/js/node/net/net-mongodb-pattern-leak.test.ts b/test/js/node/net/net-mongodb-pattern-leak.test.ts
index db9bd9e9b532..559c7d9fba60 100644
--- a/test/js/node/net/net-mongodb-pattern-leak.test.ts
+++ b/test/js/node/net/net-mongodb-pattern-leak.test.ts
@@ -202,9 +202,10 @@ describe.each([
       expect(messages.listenerCount("data")).toBe(0);
       expect(messages.listenerCount("error")).toBeLessThanOrEqual(1);
 
-      // RSS round-2 vs round-1: weak signal (mimalloc segment noise) but
-      // catches anything egregious that heapStats can't see.
-      const rssBound = isASAN || isDebug ? 32 * 1024 * 1024 : 8 * 1024 * 1024;
+      // RSS round-2 vs round-1: weak backstop for native leaks heapStats can't
+      // see. Release CI observed 8-13 MB here with flat heapSize and flat object
+      // counts (mimalloc + JIT noise); a real native leak at ITER=5000 is 25+ MB.
+      const rssBound = isASAN || isDebug ? 32 * 1024 * 1024 : 24 * 1024 * 1024;
       expect(after2.rss - after1.rss).toBeLessThan(rssBound);
     } finally {
       sock.destroy();
diff --git a/test/js/node/net/node-net.test.ts b/test/js/node/net/node-net.test.ts
index cd2c3906dc80..f8beeb60ba1a 100644
--- a/test/js/node/net/node-net.test.ts
+++ b/test/js/node/net/node-net.test.ts
@@ -842,7 +842,7 @@ it.if(isWindows)(
     }
 
     const batch = [];
-    const before = heapStats().objectTypeCounts.TLSSocket || 0;
+    const before = heapStats().objectTypeCounts.TCPSocket || 0;
     for (let i = 0; i < 100; i++) {
       batch.push(test(`\\\\.\\pipe\\test\\${randomUUID()}`));
       batch.push(test(`\\\\?\\pipe\\test\\${randomUUID()}`));
@@ -857,7 +857,7 @@ it.if(isWindows)(
       }
     }
     await Promise.all(batch);
-    expectMaxObjectTypeCount(expect, "TCPSocket", before);
+    await expectMaxObjectTypeCount(expect, "TCPSocket", before);
   },
   20_000,
 );