diff --git a/tests/rules.mk b/tests/rules.mk
index fe1051c0..14d4a0c9 100644
--- a/tests/rules.mk
+++ b/tests/rules.mk
@@ -71,6 +71,7 @@ OPENCM3_INC = $(OPENCM3_DIR)/include
 INCLUDES += $(patsubst %,-I%, . $(OPENCM3_INC) )
 
 OBJS = $(CFILES:%.c=$(BUILD_DIR)/%.o)
+GENERATED_BINS = $(PROJECT).elf $(PROJECT).bin $(PROJECT).map $(PROJECT).list $(PROJECT).lss
 
 TGT_CPPFLAGS += -MD
 TGT_CPPFLAGS += -Wall -Wundef $(INCLUDES)
@@ -164,7 +165,7 @@ else
 endif
 
 clean:
-	rm -rf $(BUILD_DIR) $(PROJECT).{elf,bin} $(PROJECT).{list,lss,map}
+	rm -rf $(BUILD_DIR) $(GENERATED_BINS)
 
 .PHONY: all clean flash
 -include $(OBJS:.o=.d)