diff --git a/test/test_companion_power_diagnostics.py b/test/test_companion_power_diagnostics.py
index 1b3c5321e..4f412e888 100644
--- a/test/test_companion_power_diagnostics.py
+++ b/test/test_companion_power_diagnostics.py
@@ -7,24 +7,30 @@ import subprocess
 import tempfile
 import unittest
 
+from cpp_source import body
+
 ROOT = Path(__file__).resolve().parents[1]
 
 
 class CompanionPowerDiagnosticsTests(unittest.TestCase):
     def test_native_usb_wait_counts_only_the_sdk_call_and_preserves_fallback(self):
         source = (ROOT / "examples/companion_radio/main.cpp").read_text(encoding="ascii")
-        start = source.index("    bool sleep_failed = false;")
-        block = source[start:source.index("#elif COMPANION_IDF_PM_AVAILABLE", start)]
+        block = body(source, "if (can_sleep && the_mesh.canIdleDualRadio())")
         code = r'''
+#define ESP32_PLATFORM 1
+#define ENABLE_USB_INTERFACE 1
+#define ARDUINO_USB_CDC_ON_BOOT 1
 #include <cassert>
 #include <initializer_list>
 #include <helpers/PowerSavingDiagnostics.h>
+#include <helpers/esp32/ProfileIdleSleep.h>
 using mesh::powerdiag::Reason;
 using esp_err_t = int;
 constexpr int ESP_OK = 0;
 static uint32_t clock_us = 100000;
 static uint32_t millis() { return clock_us / 1000; }
 static uint32_t micros() { return clock_us; }
+int64_t esp_timer_get_time() { return clock_us; }
 static bool ready = true;
 static int timer_error = 0, sleep_error = 0;
 static unsigned ready_calls = 0, timer_calls = 0, wait_calls = 0, delay_calls = 0;
@@ -35,8 +41,20 @@ static int esp_sleep_enable_timer_wakeup(uint64_t us) {
 static int esp_light_sleep_start() { ++wait_calls; clock_us += 500; return sleep_error; }
 static unsigned pdMS_TO_TICKS(unsigned ms) { return ms; }
 static void vTaskDelay(unsigned ms) { assert(ms == 10); ++delay_calls; clock_us += 10000; }
+struct Mesh {
+  bool dual=false,profile_ready=false;
+  unsigned profile_queries=0;
+  bool canIdleDualRadio()const{return true;}
+  bool isDualRadioActive()const{return dual;}
+  bool getDualRadioIdleDelay(uint32_t& ms){++profile_queries;ms=3;return profile_ready;}
+} the_mesh;
+struct Board {
+  unsigned profile_calls=0;uint32_t deadline=0;
+  void sleepUntilMicroseconds(uint32_t value){++profile_calls;deadline=value;}
+} board;
 static void attempt() {
-  const uint32_t idle_slice_ms = 10;
+  const bool can_sleep=true,noise_floor_wait=false;
+  const uint32_t noise_floor_delay_ms=0;
 @BLOCK@
 }
 int main() {
@@ -65,17 +83,40 @@ int main() {
         if (mode >= 2) assert(value.detail == -static_cast<int>(mode));
       }
     }
+    // Scanner rejection retains polling and must never take the native
+    // single-profile SDK wait or fallback RTOS delay. Exercise the actual
+    // production deadline helper, rather than substituting a helper result.
+    for (unsigned mode=0;mode<3;++mode) {
+      clock_us=100000;setEnabled(diagnostics,millis());reset(millis());
+      decision(0,millis());the_mesh.dual=true;the_mesh.profile_ready=mode==2;
+      the_mesh.profile_queries=board.profile_calls=0;
+      ready=mode!=0;timer_error=sleep_error=0;
+      ready_calls=timer_calls=wait_calls=delay_calls=0;
+      attempt();
+      assert(ready_calls==1 && timer_calls==0 && wait_calls==0 && delay_calls==0);
+      assert(the_mesh.profile_queries==(mode!=0) && board.profile_calls==(mode==2));
+      if(mode==2)assert(board.deadline==103000);
+      const auto value=snapshot(millis());
+      assert(value.calls==0 && value.returns==0 && value.errors==0);
+      if(diagnostics) {
+        assert(value.board_vetoes==(mode==0));
+        assert(value.current==(mode==0?mask(Reason::Board):mode==1?mask(Reason::DualRadio):0));
+      }
+    }
+    the_mesh.dual=false;
   }
 }
 '''.replace("@BLOCK@", block)
         with tempfile.TemporaryDirectory(prefix="meshcore-companion-power-") as directory:
             cpp = Path(directory) / "test.cpp"
             binary = Path(directory) / "test"
+            (Path(directory) / "esp_timer.h").write_text(
+                "#pragma once\n#include <stdint.h>\nint64_t esp_timer_get_time();\n", encoding="ascii")
             cpp.write_text(code, encoding="ascii")
             built = subprocess.run([
                 os.environ.get("CXX", "c++"), "-std=c++17", "-Wall", "-Wextra", "-Werror",
                 "-fsanitize=address,undefined", "-fno-sanitize-recover=all", "-fno-pie", "-no-pie",
-                "-I", str(ROOT / "src"), str(cpp), "-o", str(binary),
+                "-I", str(directory), "-I", str(ROOT / "src"), str(cpp), "-o", str(binary),
             ], capture_output=True, text=True, timeout=60)
             self.assertEqual(built.returncode, 0, built.stdout + built.stderr)
             result = subprocess.run([str(binary)], capture_output=True, text=True, timeout=20)