diff --git a/tests/common.mk b/tests/common.mk
index 0e85e9fb9..ef6982514 100644
--- a/tests/common.mk
+++ b/tests/common.mk
@@ -1,16 +1,9 @@
 ROOT_DIR := $(abspath $(dir $(lastword $(MAKEFILE_LIST))))
 BUILD_DIR ?= $(ROOT_DIR)/..
-ifneq ($(wildcard $(ROOT_DIR)/../Makefile.conf),)
-include $(ROOT_DIR)/../Makefile.conf
-endif
 
 SBY   ?= sby
 YOSYS ?= $(BUILD_DIR)/yosys
-ifneq ($(ABCEXTERNAL),)
-ABC	  ?= $(ABCEXTERNAL)
-else
 ABC   ?= $(BUILD_DIR)/yosys-abc
-endif
 YOSYS_FILTERLIB ?= $(BUILD_DIR)/yosys-filterlib
 YOSYS_CONFIG ?= $(BUILD_DIR)/yosys-config
 YOSYS_SMTBMC ?= $(BUILD_DIR)/yosys-smtbmc