diff --git a/test/browser/test_small_js_flags.js.size b/test/browser/test_small_js_flags.js.size
index 51aa141c6a273..39604eacfffc5 100644
--- a/test/browser/test_small_js_flags.js.size
+++ b/test/browser/test_small_js_flags.js.size
@@ -1 +1 @@
-3936
+4106
diff --git a/test/browser_reporting.js b/test/browser_reporting.js
index cfef660d5b8db..786d7b495e30b 100644
--- a/test/browser_reporting.js
+++ b/test/browser_reporting.js
@@ -1,9 +1,9 @@
 // Set this to true to have stdout and stderr sent back to the server
-var captureStdoutStderr = false;
+var captureStdoutStderr = true;
 
 var hasModule = typeof Module === 'object' && Module;
 
-var reportingURL = 'http://localhost:8888/';
+var reportingURL = 'http://localhost:8888';
 
 async function reportResultToServer(result) {
   if (reportResultToServer.reported) {
diff --git a/test/common.py b/test/common.py
index 44082369e258a..7c654ad023dad 100644
--- a/test/common.py
+++ b/test/common.py
@@ -2127,7 +2127,9 @@ def do_POST(self):
         self.send_response(200)
         self.end_headers()
       else:
-        print(f'do_POST: unexpected POST: {urlinfo.query}')
+        print(f'do_POST: unexpected POST: {self.path} {urlinfo}')
+        self.send_response(404)
+        self.end_headers()
 
     def do_GET(self):
       info = urlparse(self.path)
diff --git a/tools/link.py b/tools/link.py
index 0fa6443d07100..1230ccd8b25c5 100644
--- a/tools/link.py
+++ b/tools/link.py
@@ -800,7 +800,7 @@ def phase_linker_setup(options, linker_args):  # noqa: C901, PLR0912, PLR0915
   def limit_incoming_module_api():
     if options.oformat == OFormat.HTML and options.shell_path == DEFAULT_SHELL_HTML:
       # Out default shell.html file has minimal set of INCOMING_MODULE_JS_API elements that it expects
-      default_setting('INCOMING_MODULE_JS_API', 'canvas,monitorRunDependencies,onAbort,onExit,print,setStatus'.split(','))
+      default_setting('INCOMING_MODULE_JS_API', 'canvas,monitorRunDependencies,onAbort,onExit,print,printErr,setStatus'.split(','))
     else:
       default_setting('INCOMING_MODULE_JS_API', [])