diff --git a/test/fixtures/official_web_console/firmware.cpp b/test/fixtures/official_web_console/firmware.cpp
index 705637818..e1c92640e 100644
--- a/test/fixtures/official_web_console/firmware.cpp
+++ b/test/fixtures/official_web_console/firmware.cpp
@@ -43,6 +43,7 @@ struct MyMesh {
   Prefs* _prefs = &prefs;
   Sensors* _sensors = &sensors;
   unsigned saves = 0;
+  bool dual_radio_active = false;
   void savePrefs() { ++saves; }
   void set(const char* config, char* reply) { @SETTER@ }
   void get(const char* config, char* reply) { @GETTER@ }
@@ -53,6 +54,7 @@ struct MyMesh {
   }
   void cancelPendingSerialOutput() {}
   bool hasPendingSerialOutput() { return false; }
+  bool isDualRadioActive() { return dual_radio_active; }
   Prefs* getNodePrefs() { return _prefs; }
   unsigned getPowerSaveSleepSeconds(unsigned limit) { return limit; }
   bool millisHasNowPassed(unsigned deadline) { return millis() > deadline; }
diff --git a/test/test_official_web_console.py b/test/test_official_web_console.py
index 1c4b04aeb..44974fc20 100644
--- a/test/test_official_web_console.py
+++ b/test/test_official_web_console.py
@@ -44,7 +44,7 @@ def official_console():
 
 
 def firmware_harness(*, lose_sleep_guard=False, lose_crlf=False,
-                     lose_raw_uart_guard=False):
+                     lose_raw_uart_guard=False, lose_dual_radio_guard=False):
     # Retain the existing host peripheral boundary; use the production methods
     # and a virtual clock to exercise minutes/hours without slowing CI.
     source = HARNESS.split("int main()", 1)[0]
@@ -78,6 +78,10 @@ def firmware_harness(*, lose_sleep_guard=False, lose_crlf=False,
     morse_declaration = "  const bool morse_timing = mesh::morseTimingActive(&radio_driver);"
     assert morse_declaration in main[:start], "Missing live Morse ownership snapshot"
     power_loop = morse_declaration + "\n" + main[start:end]
+    if lose_dual_radio_guard:
+        guard = " && !the_mesh.isDualRadioActive()"
+        assert power_loop.count(guard) == 1, "Missing radio2 idle-delay negative-control boundary"
+        power_loop = power_loop.replace(guard, "")
     morse_helper = body((ROOT / "src/helpers/MorseLoopPolicy.h").read_text(),
                         "inline bool morseTimingActive(const Radio* radio)")
     # Model only RF ownership at the peripheral boundary; use the real helper
@@ -157,6 +161,48 @@ class OfficialWebConsoleTests(unittest.TestCase):
         self.assertNotEqual(result.returncode, 0, "Negative control did not detect buffered replies")
         self.assertIn("power-saving setter", result.stderr)
 
+    def run_dual_radio_trace(self, *, lose_dual_radio_guard=False):
+        source = firmware_harness(lose_dual_radio_guard=lose_dual_radio_guard)
+        source = source.split("int main() {", 1)[0] + r'''
+int main() {
+  attachHost(true); Serial.terminal_open = true;
+  prefs.powersaving_enabled = 1; mock_millis = 300000;
+  const unsigned before = yield_ms;
+  the_mesh.dual_radio_active = true;
+  power_loop();
+  require(sleep_calls == 0 && yield_ms == before, "Active radio2 inserted an idle delay");
+  the_mesh.dual_radio_active = false;
+  power_loop();
+  require(sleep_calls == 0 && yield_ms == before + 1, "Idle delay did not resume after radio2");
+  prefs.powersaving_enabled = 0;
+  power_loop();
+  require(sleep_calls == 0 && yield_ms == before + 1, "PS-off idle behavior changed");
+}
+'''
+        with tempfile.TemporaryDirectory(prefix="official-console-radio2-ownership-") as temporary:
+            cpp = Path(temporary) / "ownership.cpp"
+            binary = Path(temporary) / "ownership"
+            cpp.write_text(source, encoding="ascii")
+            sanitizers = (["-fsanitize=address,undefined", "-fno-sanitize-recover=all",
+                           "-fno-pie", "-no-pie"] if sys.platform.startswith("linux") else [])
+            result = subprocess.run([self.compiler, "-std=c++17", "-Wall", "-Wextra",
+                "-DARDUINO_USB_MODE=1", "-DARDUINO_USB_CDC_ON_BOOT=1", "-DESP32_PLATFORM=1",
+                "-DMESH_ESP32_USB_CONSOLE_COOPERATIVE=1", "-DMESH_USB_CONSOLE_COOPERATIVE=1",
+                "-DMESH_USB_LOGGING_AVAILABLE=1", "-DCONFIG_TINYUSB_ENABLED=0",
+                "-I", str(ROOT / "src"), *sanitizers, str(cpp), "-o", str(binary)],
+                text=True, capture_output=True, timeout=60)
+            self.assertEqual(result.returncode, 0, result.stdout + result.stderr)
+            return subprocess.run([str(binary)], text=True, capture_output=True, timeout=20)
+
+    def test_actual_radio2_ownership_skips_idle_delay_then_resumes(self):
+        result = self.run_dual_radio_trace()
+        self.assertEqual(result.returncode, 0, result.stdout + result.stderr)
+
+    def test_missing_radio2_idle_guard_is_detected(self):
+        result = self.run_dual_radio_trace(lose_dual_radio_guard=True)
+        self.assertNotEqual(result.returncode, 0, "Negative control did not detect radio2 idle delay")
+        self.assertIn("Active radio2 inserted an idle delay", result.stderr)
+
     def test_actual_morse_ownership_blocks_sleep_and_idle_delay_then_resumes(self):
         source = firmware_harness().split("int main() {", 1)[0] + r'''
 int main() {