diff --git a/test/.gitignore b/test/.gitignore
new file mode 100644
index 000000000..5baabe900
--- /dev/null
+++ b/test/.gitignore
@@ -0,0 +1,2 @@
+*.o
+*.prg
diff --git a/test/val/Makefile b/test/val/Makefile
new file mode 100644
index 000000000..5f93e1c34
--- /dev/null
+++ b/test/val/Makefile
@@ -0,0 +1,56 @@
+
+CC65FLAGS = -t sim6502
+
+CL65 := $(if $(wildcard ../../bin/cl65*),../../bin/cl65,cl65)
+SIM65 := $(if $(wildcard ../../bin/sim65*),../../bin/sim65,sim65)
+
+RM := rm -f
+
+.PHONY: all
+
+TESTS := $(patsubst %.c,%.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.o.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.os.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.osi.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.osir.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.oi.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.oir.prg,$(wildcard *.c))
+TESTS += $(patsubst %.c,%.or.prg,$(wildcard *.c))
+
+all: $(TESTS)
+
+%.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.o.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.os.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.osi.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.osir.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.oi.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.oir.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+%.or.prg: %.c
+	$(CL65) $(CC65FLAGS) $< -o $@
+	$(SIM65) $@
+
+clean:
+	@$(RM) *.o
+	@$(RM) *.prg
diff --git a/test/val/common.h b/test/val/common.h
new file mode 100644
index 000000000..dada61a14
--- /dev/null
+++ b/test/val/common.h
@@ -0,0 +1,22 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define NO_OLD_FUNC_DECL
+#define NO_TYPELESS_INT
+#define NO_TYPELESS_INT_PTR
+#define MAIN_RETURNS_INT
+#define NO_IMPLICIT_FUNC_PROTOTYPES
+#define NO_FLOATS
+#define NO_WCHAR
+#define NO_EMPTY_FUNC_ARGS
+#define NO_SLOPPY_STRUCT_INIT
+#define NO_FUNCS_TAKE_STRUCTS
+#define NO_FUNCS_RETURN_STRUCTS
+#define CAST_STRUCT_PTR
+#define NO_TYPELESS_STRUCT_PTR
+#define NO_IMPLICIT_FUNCPTR_CONV
+#define SIZEOF_INT_16BIT
+#define SIZEOF_LONG_32BIT
+#define UNSIGNED_CHARS
+#define UNSIGNED_BITFIELDS