diff --git a/stage0/astgen_test.zig b/stage0/astgen_test.zig
index 81af357905..50a5b49abb 100644
--- a/stage0/astgen_test.zig
+++ b/stage0/astgen_test.zig
@@ -1212,7 +1212,7 @@ const corpus_files = .{
     .{ "math.zig", @embedFile("../test/behavior/math.zig") },
     .{ "vector.zig", @embedFile("../test/behavior/vector.zig") },
     .{ "cast.zig", @embedFile("../test/behavior/cast.zig") },
-    //.{ "abs.zig", @embedFile("../test/behavior/abs.zig") },
+    .{ "abs.zig", @embedFile("../test/behavior/abs.zig") },
     //.{ "addrspace_and_linksection.zig", @embedFile("../test/behavior/addrspace_and_linksection.zig") },
     //.{ "align.zig", @embedFile("../test/behavior/align.zig") },
     //.{ "alignof.zig", @embedFile("../test/behavior/alignof.zig") },