diff --git a/runtest.rb b/runtest.rb
index 39c1ed1..0d62c14 100755
--- a/runtest.rb
+++ b/runtest.rb
@@ -38,6 +38,7 @@
   files.delete('build.ninja')
   files.delete('ninja.sh')
   files.delete('gmon.out')
+  files.delete('submake')
   files.reject!{|f|f =~ /\.json$/}
   files.reject!{|f|f =~ /^kati\.*/}
   files
@@ -179,6 +180,7 @@
     File.open("Makefile", 'w') do |ofile|
       ofile.print(c)
     end
+    File.symlink('../../testcase/submake', 'submake')
 
     expected = ''
     output = ''
diff --git a/testcase/submake/basic.mk b/testcase/submake/basic.mk
new file mode 100644
index 0000000..3f2239e
--- /dev/null
+++ b/testcase/submake/basic.mk
@@ -0,0 +1,2 @@
+all:
+	echo PASS
diff --git a/testcase/submake_basic.mk b/testcase/submake_basic.mk
new file mode 100644
index 0000000..c4c9d72
--- /dev/null
+++ b/testcase/submake_basic.mk
@@ -0,0 +1,4 @@
+# TODO: Fix
+
+test:
+	$(MAKE) -f submake/basic.mk