diff --git a/drivers/serial/uart_mcux_lpuart.c b/drivers/serial/uart_mcux_lpuart.c
index e4f752831deae50..7c7516c16f6d868 100644
--- a/drivers/serial/uart_mcux_lpuart.c
+++ b/drivers/serial/uart_mcux_lpuart.c
@@ -1090,6 +1090,23 @@ static int mcux_lpuart_configure_init(const struct device *dev, const struct uar
 		return ret;
 	}
 
+#ifdef CONFIG_UART_ASYNC_API
+	uart_config.rxIdleType = kLPUART_IdleTypeStopBit;
+	uart_config.rxIdleConfig = kLPUART_IdleCharacter1;
+	data->async.next_rx_buffer = NULL;
+	data->async.next_rx_buffer_len = 0;
+	data->async.uart_dev = dev;
+	k_work_init_delayable(&data->async.rx_dma_params.timeout_work,
+			      mcux_lpuart_async_rx_timeout);
+	k_work_init_delayable(&data->async.tx_dma_params.timeout_work,
+			      mcux_lpuart_async_tx_timeout);
+
+	/* Disable the UART Receiver until the async API provides a buffer to
+	 * to receive into with rx_enable
+	 */
+	uart_config.enableRx = false;
+#endif
+
 	LPUART_Init(config->base, &uart_config, clock_freq);
 
 	if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_RS485) {
diff --git a/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.conf b/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.conf
new file mode 100644
index 000000000000000..5f2a8070c8948a5
--- /dev/null
+++ b/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.conf
@@ -0,0 +1,2 @@
+# Userspace is unable to access the nocache region.
+CONFIG_USERSPACE=n
diff --git a/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.overlay b/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.overlay
index 1a0c35e198aa765..22ecfdfa712aea9 100644
--- a/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.overlay
+++ b/tests/drivers/uart/uart_async_api/boards/mimxrt1064_evk.overlay
@@ -1,11 +1,5 @@
 /* SPDX-License-Identifier: Apache-2.0 */
 
-/ {
-	chosen {
-		zephyr,sram = &dtcm;
-	};
-};
-
 dut: &lpuart3 {
 	status = "okay";
 	current-speed = <115200>;