diff --git a/test/fixtures/hwcdc_kiss_setup.cpp b/test/fixtures/hwcdc_kiss_setup.cpp
index 794e1d009..b5ae05860 100644
--- a/test/fixtures/hwcdc_kiss_setup.cpp
+++ b/test/fixtures/hwcdc_kiss_setup.cpp
@@ -1,5 +1,6 @@
 // The runner inserts the production KISS setup and backend selection.
 #include <Arduino.h>
+#include <helpers/RegulatorMode.h>
 #include <helpers/UsbLogging.h>
 #include <cassert>
 #include <string>
@@ -56,6 +57,10 @@ struct Board {
 #endif
     calls.push_back("board.begin");
   }
+  bool applyMcuRegulator(mesh::power::RegulatorMode mode) {
+    assert(mode == mesh::power::RegulatorMode::Default);
+    return false;
+  }
   void reboot() { assert(false); }
   void onBootComplete() { calls.push_back("boot.complete"); }
   void loop() { calls.push_back("board.loop"); }
diff --git a/test/test_hwcdc_tx_backport.py b/test/test_hwcdc_tx_backport.py
index 747a91b46..11b9b9b30 100644
--- a/test/test_hwcdc_tx_backport.py
+++ b/test/test_hwcdc_tx_backport.py
@@ -471,7 +471,10 @@ int main(){
         # outside pinned2.0.17 C3/S3 mode1. Link hooks are strong, never silent weak stubs.
         self.assertIn('ESP_ARDUINO_VERSION_PATCH == 17',source)
         self.assertIn('CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3',source)
-        self.assertNotIn('__attribute__((weak))',source[:source.index('namespace mesh {')])
+        preamble=source[:source.index('namespace mesh {')]
+        for declaration in preamble.split(';'):
+            if 'meshEsp32Hwcdc' in declaration:
+                self.assertNotIn('__attribute__((weak))',declaration)
         self.assertIn('Serial.setTxTimeoutMs(5);',source)
         self.assertIn('tx_timeout_ms / portTICK_PERIOD_MS',PATCHED)
         self.assertNotIn('max_consec_timeouts',PATCHED)