diff --git a/drivers/at24cxxx/mtd/mtd.c b/drivers/at24cxxx/mtd/mtd.c
index 1a69469d6c..47f581d112 100644
--- a/drivers/at24cxxx/mtd/mtd.c
+++ b/drivers/at24cxxx/mtd/mtd.c
@@ -80,5 +80,6 @@ const mtd_desc_t mtd_at24cxxx_driver = {
     .write = _mtd_at24cxxx_write,
     .write_page = mtd_at24cxxx_write_page,
     .erase = _mtd_at24cxxx_erase,
-    .power = _mtd_at24cxxx_power
+    .power = _mtd_at24cxxx_power,
+    .flags = MTD_DRIVER_FLAG_DIRECT_WRITE,
 };
diff --git a/drivers/at25xxx/mtd/mtd.c b/drivers/at25xxx/mtd/mtd.c
index 991de54c97..37d237a3e6 100644
--- a/drivers/at25xxx/mtd/mtd.c
+++ b/drivers/at25xxx/mtd/mtd.c
@@ -90,4 +90,5 @@ const mtd_desc_t mtd_at25xxx_driver = {
     .write_page = mtd_at25xxx_write_page,
     .erase = mtd_at25xxx_erase,
     .power = mtd_at25xxx_power,
+    .flags = MTD_DRIVER_FLAG_DIRECT_WRITE,
 };
diff --git a/drivers/mtd_mci/mtd_mci.c b/drivers/mtd_mci/mtd_mci.c
index a1cf194102..f1094f0e6a 100644
--- a/drivers/mtd_mci/mtd_mci.c
+++ b/drivers/mtd_mci/mtd_mci.c
@@ -143,4 +143,5 @@ const mtd_desc_t mtd_mci_driver = {
     .write_page     = mtd_mci_write_page,
     .erase_sector   = mtd_mci_erase_sector,
     .power          = mtd_mci_power,
+    .flags          = MTD_DRIVER_FLAG_DIRECT_WRITE,
 };
diff --git a/drivers/mtd_sdcard/mtd_sdcard.c b/drivers/mtd_sdcard/mtd_sdcard.c
index bac6382557..466c6e9974 100644
--- a/drivers/mtd_sdcard/mtd_sdcard.c
+++ b/drivers/mtd_sdcard/mtd_sdcard.c
@@ -158,4 +158,5 @@ const mtd_desc_t mtd_sdcard_driver = {
     .write_page = mtd_sdcard_write_page,
     .erase = mtd_sdcard_erase,
     .power = mtd_sdcard_power,
+    .flags = MTD_DRIVER_FLAG_DIRECT_WRITE,
 };
diff --git a/tests/mtd_raw/main.c b/tests/mtd_raw/main.c
index e431282290..e9d8f25d9f 100644
--- a/tests/mtd_raw/main.c
+++ b/tests/mtd_raw/main.c
@@ -406,6 +406,13 @@ static int cmd_test(int argc, char **argv)
     assert(mtd_read_page(dev, buffer, page_0, offset, sizeof(test_str)) == 0);
     assert(memcmp(test_str, buffer, sizeof(test_str)) == 0);
 
+    /* overwrite first test string, rely on MTD for read-modify-write */
+    const char test_str_2[] = "Hello World!";
+    offset = 5;
+    assert(mtd_write_page_hl(dev, test_str_2, page_0, offset, sizeof(test_str_2)) == 0);
+    assert(mtd_read_page(dev, buffer, page_0, offset, sizeof(test_str_2)) == 0);
+    assert(memcmp(test_str_2, buffer, sizeof(test_str_2)) == 0);
+
     puts("[SUCCESS]");
 
     free(buffer);