diff --git a/.gitignore b/.gitignore
index 35f5d3eb83..487af950f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -171,7 +171,7 @@ lcov*.info
 /ext/*/exts.mk
 
 # /ext/-test-/cxxanyargs
-/ext/-test-/cxxanyargs/failure.failed
+/ext/-test-/cxxanyargs/failure*.failed
 
 # /ext/-test-/win32/dln/
 /ext/-test-/win32/dln/dlntest.dll
diff --git a/ext/-test-/cxxanyargs/depend b/ext/-test-/cxxanyargs/depend
index ad8260a55f..02113b6c26 100644
--- a/ext/-test-/cxxanyargs/depend
+++ b/ext/-test-/cxxanyargs/depend
@@ -1,11 +1,13 @@
-$(TARGET_SO) $(STATIC_LIB): failure.failed
+$(TARGET_SO) $(STATIC_LIB): $(FAILURES:.cpp=.failed)
 
-failure.failed: failure.cpp cxxanyargs.o
+.SUFFIXES: .failed
+
+.cpp.failed:
 	$(Q)$(RUBY) -rfileutils \
 	  -e "t = ARGV.shift" \
 	  -e "err = IO.popen(ARGV, err:[:child, :out], &:read)" \
 	  -e "abort err unless /rb_define_method/ =~ err" \
-	  -e "FileUtils.touch(t)" $@ $(MAKE) failure.o
+	  -e "File.write(t, err)" $@ $(MAKE) $(*F).o
 
 # AUTOGENERATED DEPENDENCIES START
 cxxanyargs.o: $(RUBY_EXTCONF_H)
diff --git a/ext/-test-/cxxanyargs/extconf.rb b/ext/-test-/cxxanyargs/extconf.rb
index b3f45477ad..d2a740b989 100644
--- a/ext/-test-/cxxanyargs/extconf.rb
+++ b/ext/-test-/cxxanyargs/extconf.rb
@@ -23,6 +23,9 @@ end
 
 if ok
   $srcs = %w[cxxanyargs.cpp]
-  $cleanfiles << "failure.failed"
-  create_makefile("-test-/cxxanyargs")
+  failures = Dir.glob($srcdir + "/failure*.cpp").map {|n| File.basename(n)}
+  $cleanfiles << "$(FAILURES:.cpp=.failed)"
+  create_makefile("-test-/cxxanyargs") do |mk|
+    mk << "FAILURES #{['=', failures].join(' ')}\n"
+  end
 end
diff --git a/ext/-test-/cxxanyargs/failurem1.cpp b/ext/-test-/cxxanyargs/failurem1.cpp
new file mode 100644
index 0000000000..e58a0f4e0d
--- /dev/null
+++ b/ext/-test-/cxxanyargs/failurem1.cpp
@@ -0,0 +1,13 @@
+#include <ruby/ruby.h>
+
+static VALUE
+func_argm1(int argc, VALUE *argv, VALUE self)
+{
+    return argc > 0 ? argv[0] : Qnil;
+}
+
+extern "C" void
+Init_failure(void)
+{
+    rb_define_method(rb_cObject, "argm1", func_argm1, 0);
+}