diff --git a/features/TESTS/filesystem/heap_block_device/main.cpp b/features/TESTS/filesystem/heap_block_device/main.cpp
index 7a786cc4e3..20fbb8d8b9 100644
--- a/features/TESTS/filesystem/heap_block_device/main.cpp
+++ b/features/TESTS/filesystem/heap_block_device/main.cpp
@@ -23,6 +23,11 @@
 
 using namespace utest::v1;
 
+// TODO HACK, replace with available ram/heap property
+#if defined(TARGET_MTB_MTS_XDOT)
+    #error [NOT_SUPPORTED] Insufficient heap for heap block device tests
+#endif
+
 #define TEST_BLOCK_SIZE 128
 #define TEST_BLOCK_DEVICE_SIZE 32*TEST_BLOCK_SIZE
 #define TEST_BLOCK_COUNT 10
diff --git a/features/TESTS/filesystem/mbr_block_device/main.cpp b/features/TESTS/filesystem/mbr_block_device/main.cpp
index aaa594464e..633e7463e2 100644
--- a/features/TESTS/filesystem/mbr_block_device/main.cpp
+++ b/features/TESTS/filesystem/mbr_block_device/main.cpp
@@ -24,6 +24,11 @@
 
 using namespace utest::v1;
 
+// TODO HACK, replace with available ram/heap property
+#if defined(TARGET_MTB_MTS_XDOT)
+    #error [NOT_SUPPORTED] Insufficient heap for heap block device tests
+#endif
+
 #define BLOCK_COUNT 16
 #define BLOCK_SIZE 512
 
diff --git a/features/TESTS/filesystem/util_block_device/main.cpp b/features/TESTS/filesystem/util_block_device/main.cpp
index ede82e6861..1d1721a105 100644
--- a/features/TESTS/filesystem/util_block_device/main.cpp
+++ b/features/TESTS/filesystem/util_block_device/main.cpp
@@ -26,6 +26,11 @@
 
 using namespace utest::v1;
 
+// TODO HACK, replace with available ram/heap property
+#if defined(TARGET_MTB_MTS_XDOT)
+    #error [NOT_SUPPORTED] Insufficient heap for heap block device tests
+#endif
+
 #define BLOCK_COUNT 16
 #define BLOCK_SIZE 512