diff --git a/src/wpt/run.zig b/src/wpt/run.zig
index a4a9750d..e0a0c3f0 100644
--- a/src/wpt/run.zig
+++ b/src/wpt/run.zig
@@ -75,6 +75,7 @@ pub fn run(arena: *std.heap.ArenaAllocator, comptime dir: []const u8, f: []const
         .renderer = &renderer,
     });
     defer js_env.deinit();
+    errdefer js_env.wait() catch unreachable;
 
     var storageShelf = storage.Shelf.init(alloc);
     defer storageShelf.deinit();
diff --git a/vendor/zig-js-runtime b/vendor/zig-js-runtime
index ce1bffb8..f3a9e3d4 160000
--- a/vendor/zig-js-runtime
+++ b/vendor/zig-js-runtime
@@ -1 +1 @@
-Subproject commit ce1bffb8f5b1f30ce5f085fc81c3376a114b9753
+Subproject commit f3a9e3d448cd56a709ec2d101c05507e894d8e6f