diff --git a/.test_patterns.yml b/.test_patterns.yml
index fe848d520bf0..1acb5b490070 100644
--- a/.test_patterns.yml
+++ b/.test_patterns.yml
@@ -238,27 +238,6 @@ tests:
     owners:
       - *saleel
 
-  # Example http://ci.aztec-labs.com/18db8adf0db50928
-  # This seems to be an error in acvm wasm/js
-  - regex: "run_compose_test [a-z]*-[a-z]* box boxes"
-    error_regex: "call_indirect to a null table entry"
-    owners:
-      - *adam
-
-  # Example http://ci.aztec-labs.com/1752518c2215134c
-  # This seems to be a flake in how this is set up. TODO redo boxes.
-  - regex: "run_compose_test [a-z]*-[a-z]* box boxes"
-    error_regex: "expect.locator..toBeVisible.."
-    owners:
-      - *adam
-
-  # Example http://ci.aztec-labs.com/cd76b19670ab613f
-  # related to wasm proving browser flakes potentially
-  - regex: "run_compose_test [a-z]*-[a-z]* box boxes"
-    error_regex: "Out of bounds memory access (evaluating 'this.exports"
-    owners:
-      - *adam
-
   - regex: "run_compose_test vite-[a-z]* box boxes"
     error_regex: "Test timeout of [0-9]+ms exceeded."
     owners:
@@ -330,13 +309,6 @@ tests:
     owners:
       - *palla
 
-  # http://ci.aztec-labs.com/963635a09039594f
-  # http://ci.aztec-labs.com/d3b12131764bce18
-  - regex: "boxes/scripts/run_test.sh"
-    error_regex: "sending signal TERM to command"
-    owners:
-      - *adam
-
   # http://ci.aztec-labs.com/e8228a36afda93b8
   # Test passed but there was an error on stopping
   - regex: "playground/scripts/run_test.sh"
diff --git a/l1-contracts/scripts/forge_broadcast.js b/l1-contracts/scripts/forge_broadcast.js
index d8df4462617a..8d0e7e69d11d 100755
--- a/l1-contracts/scripts/forge_broadcast.js
+++ b/l1-contracts/scripts/forge_broadcast.js
@@ -34,8 +34,6 @@
 
 import { spawn } from "node:child_process";
 import { rmSync, writeSync } from "node:fs";
-import { request as httpRequest } from "node:http";
-import { request as httpsRequest } from "node:https";
 
 // Chain IDs for timeout selection.
 const MAINNET_CHAIN_ID = 1;
@@ -53,6 +51,11 @@ const MAX_RETRIES = parseInt(
   10,
 );
 
+if (!Number.isSafeInteger(MAX_RETRIES)) {
+  process.stderr.write(`MAX_RETRIES is not a valid integer.\n`);
+  process.exit(1);
+}
+
 // Batch size of 8 prevents forge from hanging during broadcast.
 // See: https://github.com/foundry-rs/foundry/issues/6796
 const BATCH_SIZE = 8;
@@ -86,50 +89,29 @@ function extractVerifyFlag(args) {
 
 const RPC_TIMEOUT = 10_000;
 
-/** JSON-RPC call using Node.js built-ins. Rejects on JSON-RPC errors and timeouts. */
-function rpcCall(rpcUrl, method, params) {
-  return new Promise((resolve, reject) => {
-    const url = new URL(rpcUrl);
-    const body = JSON.stringify({ jsonrpc: "2.0", id: 1, method, params });
-    const reqFn = url.protocol === "https:" ? httpsRequest : httpRequest;
-
-    const timer = setTimeout(() => {
-      req.destroy();
-      reject(new Error(`RPC call ${method} timed out after ${RPC_TIMEOUT}ms`));
-    }, RPC_TIMEOUT);
-
-    const req = reqFn(
-      url,
-      { method: "POST", headers: { "Content-Type": "application/json" } },
-      (res) => {
-        let data = "";
-        res.on("data", (chunk) => (data += chunk));
-        res.on("end", () => {
-          clearTimeout(timer);
-          try {
-            const parsed = JSON.parse(data);
-            if (parsed.error) {
-              reject(
-                new Error(
-                  `RPC error for ${method}: ${JSON.stringify(parsed.error)}`,
-                ),
-              );
-            } else {
-              resolve(parsed.result);
-            }
-          } catch {
-            reject(new Error(`Bad RPC response: ${data.slice(0, 200)}`));
-          }
-        });
-      },
-    );
-    req.on("error", (err) => {
-      clearTimeout(timer);
-      reject(err);
-    });
-    req.write(body);
-    req.end();
+/** JSON-RPC call using fetch. Rejects on JSON-RPC errors and timeouts. */
+async function rpcCall(rpcUrl, method, params) {
+  const body = JSON.stringify({ jsonrpc: "2.0", id: 1, method, params });
+  const res = await fetch(rpcUrl, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body,
+    signal: AbortSignal.timeout(RPC_TIMEOUT),
   });
+  if (!res.ok) {
+    throw new Error(`RPC HTTP ${res.status} for ${method}`);
+  }
+  const data = await res.text();
+  let parsed;
+  try {
+    parsed = JSON.parse(data);
+  } catch {
+    throw new Error(`Bad RPC response for ${method}: ${data.slice(0, 200)}`);
+  }
+  if (parsed.error) {
+    throw new Error(`RPC error for ${method}: ${JSON.stringify(parsed.error)}`);
+  }
+  return parsed.result;
 }
 
 /** Detect if the RPC endpoint is an anvil dev node via web3_clientVersion. */
@@ -205,6 +187,11 @@ const TIMEOUT = process.env.FORGE_BROADCAST_TIMEOUT
   ? parseInt(process.env.FORGE_BROADCAST_TIMEOUT, 10)
   : getDefaultTimeout(chainId);
 
+if (!Number.isSafeInteger(TIMEOUT)) {
+  process.stderr.write(`FORGE_BROADCAST_TIMEOUT is not a valid integer.\n`);
+  process.exit(1);
+}
+
 log(
   `chain_id=${chainId ?? "unknown"}, timeout=${TIMEOUT}s, max_retries=${MAX_RETRIES}, batch_size=${BATCH_SIZE}${wantsVerify ? ", verify=true (after broadcast)" : ""}`,
 );
@@ -301,7 +288,7 @@ for (let attempt = 1; attempt <= MAX_RETRIES; attempt++) {
     //   - Forge computes new nonces from on-chain state
     //   - New transactions replace any stuck ones with the same nonce
     //   - The race condition is intermittent (~0.04%), so retries almost always succeed
-    rmSync("broadcast", { recursive: true, force: true });
+    rmSync("broadcast", { recursive: true, force: true, maxRetries: 3, retryDelay: 100 });
 
     log(
       `Attempt ${attempt + 1}/${MAX_RETRIES + 1}: retrying from scratch (anvil)...`,