diff --git a/tests/drivers/flash_simulator/boards/native_posix_native_64.overlay b/tests/drivers/flash_simulator/boards/native_posix_native_64.overlay
new file mode 100644
index 00000000000..9fe8b9c2160
--- /dev/null
+++ b/tests/drivers/flash_simulator/boards/native_posix_native_64.overlay
@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "native_posix.overlay"
diff --git a/tests/drivers/flash_simulator/boards/native_sim_native_64.overlay b/tests/drivers/flash_simulator/boards/native_sim_native_64.overlay
new file mode 100644
index 00000000000..e4994493dd6
--- /dev/null
+++ b/tests/drivers/flash_simulator/boards/native_sim_native_64.overlay
@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "native_sim.overlay"