diff --git a/tools/pio/pre_custom_esp32.py b/tools/pio/pre_custom_esp32.py
index e004d5906..62274cab5 100644
--- a/tools/pio/pre_custom_esp32.py
+++ b/tools/pio/pre_custom_esp32.py
@@ -69,6 +69,8 @@ else:
     "-DFEATURE_PLUGIN_STATS=1",
     "-DFEATURE_CHART_JS=1",
 
+    "-DTESTING_FEATURE_USE_IPV6",
+
     "-DFEATURE_SETTINGS_ARCHIVE=1",
     "-DFEATURE_DEFINE_SERIAL_CONSOLE_PORT=0",
     "-DFEATURE_ESPEASY_P2P=1",
diff --git a/tools/pio/pre_custom_esp32c2.py b/tools/pio/pre_custom_esp32c2.py
index b829b2b53..b69afaf13 100644
--- a/tools/pio/pre_custom_esp32c2.py
+++ b/tools/pio/pre_custom_esp32c2.py
@@ -67,6 +67,8 @@ else:
     "-DFEATURE_PLUGIN_STATS=1",
     "-DFEATURE_CHART_JS=1",
 
+    "-DTESTING_FEATURE_USE_IPV6",
+
     "-DFEATURE_SETTINGS_ARCHIVE=1",
     "-DFEATURE_DEFINE_SERIAL_CONSOLE_PORT=0",
     "-DFEATURE_ESPEASY_P2P=1",
diff --git a/tools/pio/pre_custom_esp32c6.py b/tools/pio/pre_custom_esp32c6.py
index 8f752a236..769d161e6 100644
--- a/tools/pio/pre_custom_esp32c6.py
+++ b/tools/pio/pre_custom_esp32c6.py
@@ -67,6 +67,8 @@ else:
     "-DFEATURE_PLUGIN_STATS=1",
     "-DFEATURE_CHART_JS=1",
 
+    "-DTESTING_FEATURE_USE_IPV6",
+
     "-DFEATURE_SETTINGS_ARCHIVE=1",
     "-DFEATURE_ESPEASY_P2P=1",
     "-DFEATURE_CUSTOM_PROVISIONING=1",