diff --git a/tests/drivers/disk/disk_performance/boards/rcar_h3ulcb_r8a77951_a57.overlay b/tests/drivers/disk/disk_performance/boards/rcar_h3ulcb_r8a77951_a57.overlay
new file mode 100644
index 0000000000..9442e02b45
--- /dev/null
+++ b/tests/drivers/disk/disk_performance/boards/rcar_h3ulcb_r8a77951_a57.overlay
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&emmc2 {
+	disk {
+		status = "okay";
+	};
+	status = "okay";
+};
diff --git a/tests/drivers/disk/disk_performance/boards/rcar_salvator_xs.overlay b/tests/drivers/disk/disk_performance/boards/rcar_salvator_xs.overlay
new file mode 100644
index 0000000000..9442e02b45
--- /dev/null
+++ b/tests/drivers/disk/disk_performance/boards/rcar_salvator_xs.overlay
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&emmc2 {
+	disk {
+		status = "okay";
+	};
+	status = "okay";
+};
diff --git a/tests/subsys/sd/mmc/boards/rcar_h3ulcb_r8a77951_a57.overlay b/tests/subsys/sd/mmc/boards/rcar_h3ulcb_r8a77951_a57.overlay
new file mode 100644
index 0000000000..9442e02b45
--- /dev/null
+++ b/tests/subsys/sd/mmc/boards/rcar_h3ulcb_r8a77951_a57.overlay
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&emmc2 {
+	disk {
+		status = "okay";
+	};
+	status = "okay";
+};