diff --git a/compiler/tests/Makefile b/compiler/tests/Makefile
index d384d52f..cbe79439 100644
--- a/compiler/tests/Makefile
+++ b/compiler/tests/Makefile
@@ -3,6 +3,7 @@ include $(TOP_DIR)/openram.mk
 
 .DEFAULT_GOAL := all
 
+RM ?= "rm -rf"
 ARGS ?=
 TECH ?= scn4m_subm
 TECHS = scn4m_subm freepdk45
@@ -88,6 +89,7 @@ $(TEST_BASES):
 # To run a test in a given technology
 %.ok:
 #	@echo "Running $(gettech) $(getfile) ... "
+	@rm -rf results/$*
 	@mkdir -p results/$*/tmp
 	@docker run \
 		-v $(TOP_DIR):/openram \
@@ -102,7 +104,8 @@ $(TEST_BASES):
         vlsida/openram-ubuntu:latest \
 		sh -c ". /home/cad-user/.bashrc && python3 -u $(OPENRAM_DIR)/$(getfile).py \
 		-t $(gettech) -k $(ARGS) -p $(OPENRAM_DIR)/results/$* > $(OPENRAM_DIR)/results/$*.out 2>&1 && touch $(OPENRAM_DIR)/results/$*.ok || touch $(OPENRAM_DIR)/results/$*.bad"
-	@test -f $(TOP_DIR)/compiler/tests/results/$*.ok && echo "$* ... PASS!" && rm -rf $(TOP_DIR)/compiler/tests/results/$* || echo "$* ... FAIL!"
+	@test -f $(TOP_DIR)/compiler/tests/results/$*.ok && echo "$* ... PASS!" && \
+	$(RM) $(TOP_DIR)/compiler/tests/results/$* || echo "$* ... FAIL!"
 .DELETE_ON_ERROR: $(TEST_STAMPS)
 
 # Mount environment for debug