diff --git a/tests/src/test_cases/libs/test_libjpeg_turbo.c b/tests/src/test_cases/libs/test_libjpeg_turbo.c
index f3b0c3edf8..8df1838d31 100644
--- a/tests/src/test_cases/libs/test_libjpeg_turbo.c
+++ b/tests/src/test_cases/libs/test_libjpeg_turbo.c
@@ -45,7 +45,7 @@ void test_jpg_2(void)
 
     TEST_ASSERT_EQUAL_SCREENSHOT("libs/jpg_2.png");
 
-    TEST_ASSERT_EQUAL(mem_before, lv_test_get_free_mem());
+    TEST_ASSERT_MEM_LEAK_LESS_THAN(mem_before, 32);
 
     /* Re-add tjpgd decoder */
     lv_tjpgd_init();
diff --git a/tests/src/test_cases/libs/test_libpng.c b/tests/src/test_cases/libs/test_libpng.c
index b64fc2a443..f17339c1cd 100644
--- a/tests/src/test_cases/libs/test_libpng.c
+++ b/tests/src/test_cases/libs/test_libpng.c
@@ -45,7 +45,7 @@ void test_libpng_1(void)
 
     TEST_ASSERT_EQUAL_SCREENSHOT("libs/png_2.png");
 
-    TEST_ASSERT_EQUAL(mem_before, lv_test_get_free_mem());
+    TEST_ASSERT_MEM_LEAK_LESS_THAN(mem_before, 32);
 
     /* Re-add lodepng decoder */
     lv_lodepng_init();
diff --git a/tests/src/test_cases/libs/test_lodepng.c b/tests/src/test_cases/libs/test_lodepng.c
index d5c391e560..197b643aee 100644
--- a/tests/src/test_cases/libs/test_lodepng.c
+++ b/tests/src/test_cases/libs/test_lodepng.c
@@ -59,7 +59,7 @@ void test_lodepng_1(void)
 
     TEST_ASSERT_EQUAL_SCREENSHOT("libs/png_1.png");
 
-    TEST_ASSERT_EQUAL(mem_before, lv_test_get_free_mem());
+    TEST_ASSERT_MEM_LEAK_LESS_THAN(mem_before, 32);
 
     /* Re-add libpng decoder */
     lv_libpng_init();
diff --git a/tests/src/test_cases/libs/test_tjpgd.c b/tests/src/test_cases/libs/test_tjpgd.c
index 8f98e93e42..493ee81d76 100644
--- a/tests/src/test_cases/libs/test_tjpgd.c
+++ b/tests/src/test_cases/libs/test_tjpgd.c
@@ -59,7 +59,7 @@ void test_tjpgd_1(void)
 
     TEST_ASSERT_EQUAL_SCREENSHOT("libs/jpg_1.png");
 
-    TEST_ASSERT_EQUAL(mem_before, lv_test_get_free_mem());
+    TEST_ASSERT_MEM_LEAK_LESS_THAN(mem_before, 32);
 
     /* Re-add libjpeg_turbo decoder */
     lv_libjpeg_turbo_init();
diff --git a/tests/unity/unity_support.h b/tests/unity/unity_support.h
index b8a871d8c7..8815254ed1 100644
--- a/tests/unity/unity_support.h
+++ b/tests/unity/unity_support.h
@@ -37,6 +37,9 @@ bool lv_test_assert_image_eq(const char * fn_ref);
 #  define TEST_ASSERT_EQUAL_COLOR32(c1, c2)                   TEST_ASSERT_TRUE(lv_color32_eq(c1, c2))
 #  define TEST_ASSERT_EQUAL_COLOR32_MESSAGE(c1, c2, msg)      TEST_ASSERT_TRUE(lv_color32_eq(c1, c2), msg)
 
+
+#  define TEST_ASSERT_MEM_LEAK_LESS_THAN(prev_usage, threshold)  TEST_ASSERT_LESS_THAN(LV_ABS((int64_t)(prev_usage) - (int64_t)lv_test_get_free_mem()), threshold);
+
 #ifdef __cplusplus
 } /*extern "C"*/
 #endif