diff --git a/tests/test_build_components/common/uart/esp32-c3-idf.yaml b/tests/test_build_components/common/uart/esp32-c3-idf.yaml
new file mode 100644
index 0000000000..944aa013dd
--- /dev/null
+++ b/tests/test_build_components/common/uart/esp32-c3-idf.yaml
@@ -0,0 +1,13 @@
+# Common UART configuration for ESP32-C3 IDF tests
+# Provides a shared UART bus that components can use
+# Components will auto-use this bus if they don't specify uart_id
+
+substitutions:
+  tx_pin: GPIO20
+  rx_pin: GPIO21
+
+uart:
+  - id: uart_bus
+    tx_pin: ${tx_pin}
+    rx_pin: ${rx_pin}
+    baud_rate: 9600