diff --git a/unit_tests/unit_test_rules.mk b/unit_tests/unit_test_rules.mk
index 8a8632d9b1..a51f2652cc 100644
--- a/unit_tests/unit_test_rules.mk
+++ b/unit_tests/unit_test_rules.mk
@@ -230,8 +230,6 @@ else
 endif
 endif
 
-BOARDS_DIR = $(PROJECT_DIR)/config/boards
-
 # allow passing a custom board dir, otherwise generate it based on the board name
 ifeq ($(BOARD_DIR),)
 	BOARD_DIR = $(BOARDS_DIR)/$(PROJECT_BOARD)