diff --git a/tempfork/registry/fix_corp_redo_build_test.go b/tempfork/registry/fix_corp_redo_build_test.go
new file mode 100644
index 000000000..8f55305e5
--- /dev/null
+++ b/tempfork/registry/fix_corp_redo_build_test.go
@@ -0,0 +1,8 @@
+package registry_test
+
+// Tailscale's redo-based build system doesn't know how to skip running Go tests
+// in directories that don't contain files for the current OS.
+//
+// https://github.com/tailscale/corp/issues/293
+//
+// So this is a dummy file for now to make it happy.