diff --git a/src/test/defines.txt b/src/test/defines.txt
new file mode 100644
index 0000000..22585b1
--- /dev/null
+++ b/src/test/defines.txt
@@ -0,0 +1,6 @@
+#undef ndef
+#define a b
+#define def123
+#define df2 some text
+#define df2
+#undef def123
diff --git a/src/test/recursion.txt b/src/test/recursion.txt
new file mode 100644
index 0000000..81deabd
--- /dev/null
+++ b/src/test/recursion.txt
@@ -0,0 +1 @@
+#include "test/recursion.txt"