diff --git a/tests/drivers/uart/uart_async_api/boards/fpb_ra4e1.overlay b/tests/drivers/uart/uart_async_api/boards/fpb_ra4e1.overlay
new file mode 100644
index 00000000000..98d8c87cc7f
--- /dev/null
+++ b/tests/drivers/uart/uart_async_api/boards/fpb_ra4e1.overlay
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2025 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	sci9_default: sci9_default {
+		group1 {
+			/* tx rx */
+			psels = <RA_PSEL(RA_PSEL_SCI_9, 1, 9)>,
+			<RA_PSEL(RA_PSEL_SCI_9, 1, 10)>;
+		};
+	};
+};
+
+&spi0 {
+	status = "disabled";
+};
+
+&sci9 {
+	pinctrl-0 = <&sci9_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	dut: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};
diff --git a/tests/drivers/uart/uart_async_api/boards/voice_ra4e1.overlay b/tests/drivers/uart/uart_async_api/boards/voice_ra4e1.overlay
new file mode 100644
index 00000000000..e276242dbbe
--- /dev/null
+++ b/tests/drivers/uart/uart_async_api/boards/voice_ra4e1.overlay
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Renesas Electronics Corporation
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&pinctrl {
+	sci0_default: sci0_default {
+		group1 {
+			/* tx rx */
+			psels = <RA_PSEL(RA_PSEL_SCI_0, 1, 1)>,
+			<RA_PSEL(RA_PSEL_SCI_0, 1, 0)>;
+		};
+	};
+};
+
+&sci0 {
+	pinctrl-0 = <&sci0_default>;
+	pinctrl-names = "default";
+	status = "okay";
+	dut: uart {
+		current-speed = <115200>;
+		status = "okay";
+	};
+};