diff --git a/tests/drivers/spi/spi_loopback/boards/nucleo_n657x0_q_stm32n657xx_sb.conf b/tests/drivers/spi/spi_loopback/boards/nucleo_n657x0_q_stm32n657xx_sb.conf
new file mode 100644
index 000000000000..c448e14811f7
--- /dev/null
+++ b/tests/drivers/spi/spi_loopback/boards/nucleo_n657x0_q_stm32n657xx_sb.conf
@@ -0,0 +1 @@
+CONFIG_NOCACHE_MEMORY=y
diff --git a/tests/drivers/spi/spi_loopback/boards/nucleo_n657x0_q_stm32n657xx_sb.overlay b/tests/drivers/spi/spi_loopback/boards/nucleo_n657x0_q_stm32n657xx_sb.overlay
new file mode 100644
index 000000000000..24238c4b7bc2
--- /dev/null
+++ b/tests/drivers/spi/spi_loopback/boards/nucleo_n657x0_q_stm32n657xx_sb.overlay
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2024 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi5 {
+	dmas = <&gpdma1 0 88 STM32_DMA_PERIPH_TX
+		&gpdma1 1 87 STM32_DMA_PERIPH_RX>;
+	dma-names = "tx", "rx";
+	slow@0 {
+		compatible = "test-spi-loopback-slow";
+		reg = <0>;
+		spi-max-frequency = <500000>;
+	};
+	fast@0 {
+		compatible = "test-spi-loopback-fast";
+		reg = <0>;
+		spi-max-frequency = <16000000>;
+	};
+};
+
+&gpdma1 {
+	status = "okay";
+};
diff --git a/tests/drivers/spi/spi_loopback/boards/stm32n6570_dk_stm32n657xx_sb.conf b/tests/drivers/spi/spi_loopback/boards/stm32n6570_dk_stm32n657xx_sb.conf
new file mode 100644
index 000000000000..c448e14811f7
--- /dev/null
+++ b/tests/drivers/spi/spi_loopback/boards/stm32n6570_dk_stm32n657xx_sb.conf
@@ -0,0 +1 @@
+CONFIG_NOCACHE_MEMORY=y
diff --git a/tests/drivers/spi/spi_loopback/boards/stm32n6570_dk_stm32n657xx_sb.overlay b/tests/drivers/spi/spi_loopback/boards/stm32n6570_dk_stm32n657xx_sb.overlay
new file mode 100644
index 000000000000..24238c4b7bc2
--- /dev/null
+++ b/tests/drivers/spi/spi_loopback/boards/stm32n6570_dk_stm32n657xx_sb.overlay
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2024 STMicroelectronics
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&spi5 {
+	dmas = <&gpdma1 0 88 STM32_DMA_PERIPH_TX
+		&gpdma1 1 87 STM32_DMA_PERIPH_RX>;
+	dma-names = "tx", "rx";
+	slow@0 {
+		compatible = "test-spi-loopback-slow";
+		reg = <0>;
+		spi-max-frequency = <500000>;
+	};
+	fast@0 {
+		compatible = "test-spi-loopback-fast";
+		reg = <0>;
+		spi-max-frequency = <16000000>;
+	};
+};
+
+&gpdma1 {
+	status = "okay";
+};