diff --git a/.gitignore b/.gitignore
index 89bc643..1896ad2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,14 @@
+# nix
+.direnv
+
+# tyepscript
 /node_modules
 /target
 *.tsbuildinfo
+
+# riverdelta outputs/references
 /*-example.wat
 /out.wat
-.direnv
\ No newline at end of file
+
+# riverdelta test inputs
+/*.nil
diff --git a/test.nil b/test.nil
deleted file mode 100644
index 53be386..0000000
--- a/test.nil
+++ /dev/null
@@ -1,8 +0,0 @@
-type A[T] = struct { a: T };
-type B[T] = struct {
-  b: T,
-};
-
-function main() = ;
-
-function test(b: B[I32]) = ;