diff --git a/test/blackbox-tests/test-cases/package-materialization/instrumentation-dependencies.t b/test/blackbox-tests/test-cases/package-materialization/instrumentation-dependencies.t
new file mode 100644
index 00000000000..e44a8a5bbe7
--- /dev/null
+++ b/test/blackbox-tests/test-cases/package-materialization/instrumentation-dependencies.t
@@ -0,0 +1,42 @@
+Instrumentation backend metadata names a PPX library that is not an ordinary
+library requirement. The scoped layout must track the referenced library and
+its metadata.
+
+  $ make_dune_project 3.24
+  $ cat >>dune-project <<'EOF'
+  > (package (name instrumentation-root))
+  > (package (name instrumentation-ppx))
+  > EOF
+
+  $ mkdir backend ppx
+  $ cat >backend/dune <<'EOF'
+  > (library
+  >  (name backend)
+  >  (public_name instrumentation-root)
+  >  (modules ())
+  >  (instrumentation.backend
+  >   (ppx instrumentation-ppx)))
+  > EOF
+
+  $ cat >ppx/dune <<'EOF'
+  > (library
+  >  (name ppx)
+  >  (public_name instrumentation-ppx)
+  >  (kind ppx_rewriter)
+  >  (modules ()))
+  > EOF
+
+  $ cat >dune <<'EOF'
+  > (rule
+  >  (target marker)
+  >  (deps (package instrumentation-root))
+  >  (action (write-file %{target} "ok")))
+  > EOF
+
+The PPX package's metadata is not currently a dependency of the action.
+
+  $ dune rules --format=json _build/default/marker |
+  > jq_dune '.[] | ruleDepFilePaths' |
+  > censor |
+  > grep 'lib/instrumentation-ppx/dune-package'
+  [1]