diff --git a/stage0/astgen_test.zig b/stage0/astgen_test.zig
index 0df6087650..ae332a56cd 100644
--- a/stage0/astgen_test.zig
+++ b/stage0/astgen_test.zig
@@ -1242,7 +1242,7 @@ const corpus_files = .{
     "../test/behavior/extern.zig",
     "../test/behavior/fn_delegation.zig",
     "../test/behavior/fn_in_struct_in_comptime.zig",
-    //"../test/behavior/fn.zig",
+    "../test/behavior/fn.zig",
     "../test/behavior/for.zig",
     //"../test/behavior/generics.zig",
     "../test/behavior/globals.zig",