diff --git a/tests/Makefile b/tests/Makefile
index bd7fe3738..04ad1afae 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -8,8 +8,8 @@ LVGL_DIR_NAME ?= lvgl
 WARNINGS = -Werror -Wall -Wextra \
            -Wshadow -Wundef -Wmaybe-uninitialized -Wmissing-prototypes -Wpointer-arith -Wuninitialized \
            -Wunreachable-code -Wreturn-type -Wmultichar -Wformat-security -Wdouble-promotion -Wclobbered -Wdeprecated  \
-           -Wempty-body -Wshift-negative-value -Wstack-usage=2048 \
-           -Wtype-limits -Wsizeof-pointer-memaccess
+           -Wempty-body -Wshift-negative-value -Wstack-usage=2048 -pedantic-errors \
+           -Wtype-limits -Wsizeof-pointer-memaccess -Wpedantic -Wmissing-prototypes -Wno-discarded-qualifiers
 
 #-Wno-unused-value -Wno-unused-parameter
 OPTIMIZATION ?= -O3 -g0
diff --git a/tests/lv_test_core/lv_test_font_loader.c b/tests/lv_test_core/lv_test_font_loader.c
index c61f5c120..16d75444b 100644
--- a/tests/lv_test_core/lv_test_font_loader.c
+++ b/tests/lv_test_core/lv_test_font_loader.c
@@ -16,6 +16,9 @@
 
 #include "lv_test_font_loader.h"
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+
 /*********************
  *      DEFINES
  *********************/
@@ -212,6 +215,7 @@ static int compare_fonts(lv_font_t * f1, lv_font_t * f2)
 }
 #endif
 
+#pragma GCC diagnostic pop
 /**********************
  *   STATIC FUNCTIONS
  **********************/