diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-new/dune b/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-new/dune
new file mode 100644
index 00000000..36489c8e
--- /dev/null
+++ b/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-new/dune
@@ -0,0 +1,5 @@
+
+(library
+ ((name foo_ppx_rewriter_dune)
+  (public_name foo.ppx_rewriter_dune)
+  (kind ppx_rewriter)))
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-new/foo_ppx_rewriter_dune.ml b/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-new/foo_ppx_rewriter_dune.ml
new file mode 100644
index 00000000..e69de29b
diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-old/foo_ppx_rewriter_jbuild.ml b/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-old/foo_ppx_rewriter_jbuild.ml
new file mode 100644
index 00000000..e69de29b
diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-old/jbuild b/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-old/jbuild
new file mode 100644
index 00000000..75749ead
--- /dev/null
+++ b/test/blackbox-tests/test-cases/gen-opam-install-file/ppx-old/jbuild
@@ -0,0 +1,5 @@
+
+(library
+ ((name foo_ppx_rewriter_jbuild)
+  (public_name foo.ppx_rewriter_jbuild)
+  (kind ppx_rewriter)))
diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/run.t b/test/blackbox-tests/test-cases/gen-opam-install-file/run.t
index 990fb4ad..5dc1c2f7 100644
--- a/test/blackbox-tests/test-cases/gen-opam-install-file/run.t
+++ b/test/blackbox-tests/test-cases/gen-opam-install-file/run.t
@@ -9,14 +9,30 @@
       ocamldep foo_byte.ml.d
         ocamlc .foo_byte.objs/foo_byte.{cmi,cmo,cmt}
         ocamlc foo_byte.cma
+      ocamldep ppx-old/foo_ppx_rewriter.ml.d
+        ocamlc ppx-old/.foo_ppx_rewriter.objs/foo_ppx_rewriter.{cmi,cmo,cmt}
+      ocamlopt ppx-old/.foo_ppx_rewriter.objs/foo_ppx_rewriter.{cmx,o}
+      ocamlopt ppx-old/foo_ppx_rewriter.{a,cmxa}
+      ocamlopt ppx-old/foo_ppx_rewriter.cmxs
         ocamlc .foo.objs/foo.{cmo,cmt}
         ocamlc foo.cma
         ocamlc .bar.eobjs/bar.{cmi,cmo,cmt}
       ocamlopt .bar.eobjs/bar.{cmx,o}
       ocamlopt bar.exe
+        ocamlc ppx-old/foo_ppx_rewriter.cma
+      ocamlopt .ppx/foo.ppx_rewriter/ppx.exe
   lib: [
     "_build/install/default/lib/foo/META" {"META"}
     "_build/install/default/lib/foo/opam" {"opam"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.cmi" {"ppx_rewriter/foo_ppx_rewriter.cmi"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.cmx" {"ppx_rewriter/foo_ppx_rewriter.cmx"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.cmt" {"ppx_rewriter/foo_ppx_rewriter.cmt"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.ml" {"ppx_rewriter/foo_ppx_rewriter.ml"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.cma" {"ppx_rewriter/foo_ppx_rewriter.cma"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.cmxa" {"ppx_rewriter/foo_ppx_rewriter.cmxa"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter$ext_lib" {"ppx_rewriter/foo_ppx_rewriter$ext_lib"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo_ppx_rewriter.cmxs" {"ppx_rewriter/foo_ppx_rewriter.cmxs"}
+    "_build/install/default/lib/foo/ppx_rewriter/foo.ppx_rewriter.dune" {"ppx_rewriter/foo.ppx_rewriter.dune"}
     "_build/install/default/lib/foo/foo.cmi" {"foo.cmi"}
     "_build/install/default/lib/foo/foo.cmx" {"foo.cmx"}
     "_build/install/default/lib/foo/foo.cmt" {"foo.cmt"}
@@ -36,6 +52,9 @@
     "_build/install/default/lib/foo/byte/foo_byte.cma" {"byte/foo_byte.cma"}
     "_build/install/default/lib/foo/byte/foo.byte.dune" {"byte/foo.byte.dune"}
   ]
+  libexec: [
+    "_build/install/default/lib/foo/ppx_rewriter/ppx.exe" {"ppx_rewriter/ppx.exe"}
+  ]
   bin: [
     "_build/install/default/bin/bar" {"bar"}
   ]