diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/cfoo.h b/test/blackbox-tests/test-cases/gen-opam-install-file/cfoo.h
new file mode 100644
index 00000000..e69de29b
diff --git a/test/blackbox-tests/test-cases/gen-opam-install-file/jbuild b/test/blackbox-tests/test-cases/gen-opam-install-file/jbuild
index 69c81765..c20e76ba 100644
--- a/test/blackbox-tests/test-cases/gen-opam-install-file/jbuild
+++ b/test/blackbox-tests/test-cases/gen-opam-install-file/jbuild
@@ -3,6 +3,7 @@
 (library
  ((name foo)
   (modules (foo))
+  (install_c_headers (cfoo))
   (wrapped false)
   (public_name foo)))
 
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 d43cab93..77169e6c 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
@@ -23,6 +23,7 @@
     "_build/install/default/lib/foo/foo.cmxa"
     "_build/install/default/lib/foo/foo.a"
     "_build/install/default/lib/foo/foo.cmxs"
+    "_build/install/default/lib/foo/cfoo.h"
     "_build/install/default/lib/foo/byte/foo_byte.cmi" {"byte/foo_byte.cmi"}
     "_build/install/default/lib/foo/byte/foo_byte.cmt" {"byte/foo_byte.cmt"}
     "_build/install/default/lib/foo/byte/foo_byte.ml" {"byte/foo_byte.ml"}