diff --git a/test/blackbox-tests/test-cases/shadow-bindings/dune b/test/blackbox-tests/test-cases/shadow-bindings/dune
index 68875f23..bbb68666 100644
--- a/test/blackbox-tests/test-cases/shadow-bindings/dune
+++ b/test/blackbox-tests/test-cases/shadow-bindings/dune
@@ -2,4 +2,14 @@
 (alias
  (name runtest)
  (deps (:root foo))
- (action (echo %{root})))
\ No newline at end of file
+ (action (echo %{root})))
+
+(alias
+ (name   runtest)
+ (deps   (:read x))
+ (action (progn
+          (echo %{read})
+          (echo %{read:y}))))
+
+(rule (with-stdout-to x (echo "a\n")))
+(rule (with-stdout-to y (echo "b\n")))
diff --git a/test/blackbox-tests/test-cases/shadow-bindings/run.t b/test/blackbox-tests/test-cases/shadow-bindings/run.t
index 015e5376..8c9d2c57 100644
--- a/test/blackbox-tests/test-cases/shadow-bindings/run.t
+++ b/test/blackbox-tests/test-cases/shadow-bindings/run.t
@@ -1,4 +1,14 @@
 Bindings introduced by user dependencies should shadow existing bindings
 
   $ dune runtest
+  Internal error, please report upstream including the contents of _build/log.
+  Description:
+  ("Local named variable not present in named deps"
+   (pform "\%{read:y}")
+   (deps_written_by_user ((:read (In_build_dir default/x)))))
+  Backtrace:
+  Raised at file "src/dep_path.ml" (inlined), line 45, characters 24-55
+  Called from file "src/build_system.ml", line 89, characters 6-48
+  Called from file "src/fiber/fiber.ml", line 243, characters 6-18
   foo
+  [1]