diff --git a/OWNERS b/OWNERS
index 4686b3edf9..330e846220 100644
--- a/OWNERS
+++ b/OWNERS
@@ -7,7 +7,8 @@ dsinclair@chromium.org
 enga@chromium.org
 jiawei.shao@intel.com
 
-# TODO(dawn:1337): Move this file in src/dawn.
+# TODO(crbug.com/dawn/1339): Move dawn.json into src/dawn.
 per-file dawn.json=file://src/dawn/OWNERS
+
 per-file DEPS=*
 per-file README.md=file://docs/OWNERS
diff --git a/third_party/gn/webgpu-cts/OWNERS b/third_party/gn/webgpu-cts/OWNERS
new file mode 100644
index 0000000000..3b2967349c
--- /dev/null
+++ b/third_party/gn/webgpu-cts/OWNERS
@@ -0,0 +1,3 @@
+per-file cache_list.txt=*
+per-file test_list.txt=*
+per-file ts_sources.txt=*
diff --git a/webgpu-cts/OWNERS b/webgpu-cts/OWNERS
new file mode 100644
index 0000000000..cf6c84c1a7
--- /dev/null
+++ b/webgpu-cts/OWNERS
@@ -0,0 +1 @@
+per-file expectations.txt=*