diff --git a/test/Makefile b/test/Makefile
index 95c9a9194..702b332d5 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -10,13 +10,11 @@ ifneq ($(shell echo),)
 endif
 
 ifdef CMD_EXE
-  M := -
   EXE := .exe
-  DEL = del /f $(subst /,\,$1)
+  DEL = -del /f $(subst /,\,$1)
   MKDIR = mkdir $(subst /,\,$1)
-  RMDIR = rmdir /s /q $(subst /,\,$1)
+  RMDIR = -rmdir /s /q $(subst /,\,$1)
 else
-  M :=
   EXE :=
   DEL = $(RM) $1
   MKDIR = mkdir $1
@@ -54,5 +52,5 @@ mostly-clean:
 	@$(MAKE) -C misc clean
 
 clean: mostly-clean
-	$M@$(call DEL,$(WORKDIR)/bdiff$(EXE))
-	$M@$(call RMDIR,$(WORKDIR))
+	@$(call DEL,$(WORKDIR)/bdiff$(EXE))
+	@$(call RMDIR,$(WORKDIR))
diff --git a/test/err/Makefile b/test/err/Makefile
index 6ac457114..454a560ce 100644
--- a/test/err/Makefile
+++ b/test/err/Makefile
@@ -6,11 +6,9 @@ ifneq ($(shell echo),)
 endif
 
 ifdef CMD_EXE
-  M := -
   NOT := - # Hack
-  DEL = del /f $(subst /,\,$1)
+  DEL = -del /f $(subst /,\,$1)
 else
-  M :=
   NOT := !
   DEL = $(RM) $1
 endif
@@ -46,5 +44,5 @@ $(WORKDIR)/%.or.prg: %.c
 	$(NOT) $(CL65) -Or $(CC65FLAGS) $< -o $@
 
 clean:
-	$M@$(call DEL,$(TESTS))
-	$M@$(call DEL,$(SOURCES:.c=.o))
+	@$(call DEL,$(TESTS))
+	@$(call DEL,$(SOURCES:.c=.o))
diff --git a/test/misc/Makefile b/test/misc/Makefile
index dfd937ad3..918316c6c 100644
--- a/test/misc/Makefile
+++ b/test/misc/Makefile
@@ -6,12 +6,10 @@ ifneq ($(shell echo),)
 endif
 
 ifdef CMD_EXE
-  M := -
   S := $(subst /,\,/)
   NOT := - # Hack
-  DEL = del /f $(subst /,\,$1)
+  DEL = -del /f $(subst /,\,$1)
 else
-  M :=
   S := /
   NOT := !
   DEL = $(RM) $1
@@ -60,6 +58,6 @@ $(WORKDIR)/cc65141011%prg: cc65141011.c
 	-$(SIM65) $(SIM65FLAGS) $@
 
 clean:
-	$M@$(call DEL,$(TESTS))
-	$M@$(call DEL,$(SOURCES:.c=.o))
-	$M@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.out))
+	@$(call DEL,$(TESTS))
+	@$(call DEL,$(SOURCES:.c=.o))
+	@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.out))
diff --git a/test/ref/Makefile b/test/ref/Makefile
index 83b81f9cc..09dd96d44 100644
--- a/test/ref/Makefile
+++ b/test/ref/Makefile
@@ -7,11 +7,9 @@ ifneq ($(shell echo),)
 endif
 
 ifdef CMD_EXE
-  M := -
   S := $(subst /,\,/)
-  DEL = del /f $(subst /,\,$1)
+  DEL = -del /f $(subst /,\,$1)
 else
-  M :=
   S := /
   DEL = $(RM) $1
 endif
@@ -91,8 +89,8 @@ $(WORKDIR)/%.or.prg: %.c $(WORKDIR)/%.ref
 	$(DIFF) $(WORKDIR)/$*.out $(WORKDIR)/$*.ref
 
 clean:
-	$M@$(call DEL,$(TESTS))
-	$M@$(call DEL,$(SOURCES:.c=.o))
-	$M@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.out))
-	$M@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.ref))
-	$M@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.host))
+	@$(call DEL,$(TESTS))
+	@$(call DEL,$(SOURCES:.c=.o))
+	@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.out))
+	@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.ref))
+	@$(call DEL,$(SOURCES:%.c=$(WORKDIR)/%.host))
diff --git a/test/val/Makefile b/test/val/Makefile
index b82d8fb51..4ad8160ef 100644
--- a/test/val/Makefile
+++ b/test/val/Makefile
@@ -6,10 +6,8 @@ ifneq ($(shell echo),)
 endif
 
 ifdef CMD_EXE
-  M := -
-  DEL = del /f $(subst /,\,$1)
+  DEL = -del /f $(subst /,\,$1)
 else
-  M :=
   DEL = $(RM) $1
 endif
 
@@ -68,5 +66,5 @@ $(WORKDIR)/%.or.prg: %.c
 	$(SIM65) $(SIM65FLAGS) $@
 
 clean:
-	$M@$(call DEL,$(TESTS))
-	$M@$(call DEL,$(SOURCES:.c=.o))
+	@$(call DEL,$(TESTS))
+	@$(call DEL,$(SOURCES:.c=.o))