diff --git a/tests/pkg_qr-code-generator/Kconfig b/tests/pkg_qr-code-generator/Kconfig
index e22856bd2b..b03c3d767f 100644
--- a/tests/pkg_qr-code-generator/Kconfig
+++ b/tests/pkg_qr-code-generator/Kconfig
@@ -7,4 +7,4 @@ config APPLICATION
 config BOARD_HAS_DISPLAY
     bool
     default y
-    depends on BOARD_PINETIME || BOARD_ADAFRUIT_CLUE || BOARD_STM32F429I_DISC1 || BOARD_STM32F429I_DISCO || BOARD_ESP32_WROVER_KIT
+    depends on BOARD_PINETIME || BOARD_ADAFRUIT_CLUE || BOARD_STM32F429I_DISC1 || BOARD_STM32F429I_DISCO || BOARD_STM32F746G_DISCO || BOARD_ESP32_WROVER_KIT
diff --git a/tests/pkg_qr-code-generator/Makefile.board.dep b/tests/pkg_qr-code-generator/Makefile.board.dep
index debabcf92e..82531e5413 100644
--- a/tests/pkg_qr-code-generator/Makefile.board.dep
+++ b/tests/pkg_qr-code-generator/Makefile.board.dep
@@ -1,4 +1,4 @@
 # Boards with a screen can use disp_dev
-ifneq (,$(filter stm32f429i-disc% pinetime adafruit-clue esp32-wrover-kit,$(BOARD)))
+ifneq (,$(filter stm32f429i-disc% stm32f746g-disco pinetime adafruit-clue esp32-wrover-kit,$(BOARD)))
   USEMODULE += disp_dev
 endif
diff --git a/tests/pkg_qr-code-generator/main.c b/tests/pkg_qr-code-generator/main.c
index 5c97c32c90..f387dbdbea 100644
--- a/tests/pkg_qr-code-generator/main.c
+++ b/tests/pkg_qr-code-generator/main.c
@@ -42,7 +42,11 @@ static uint8_t qr0[qrcodegen_BUFFER_LEN_FOR_VERSION(ENCODER_VERSION)];
 static uint8_t buffer[qrcodegen_BUFFER_LEN_FOR_VERSION(ENCODER_VERSION)];
 
 #ifdef MODULE_DISP_DEV
+#ifdef LCD_SCREEN_WIDTH
+#define DISPLAY_BUFFER_MAX_SIZE (LCD_SCREEN_WIDTH)
+#else
 #define DISPLAY_BUFFER_MAX_SIZE (320)
+#endif
 static uint16_t display_buffer[DISPLAY_BUFFER_MAX_SIZE] = { 0 };
 #endif