diff --git a/test/blackbox-tests/dune.inc b/test/blackbox-tests/dune.inc
index 6fdafb7b..c3d357ce 100644
--- a/test/blackbox-tests/dune.inc
+++ b/test/blackbox-tests/dune.inc
@@ -200,6 +200,14 @@
    test-cases/gen-opam-install-file
    (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
 
+(alias
+ (name github1019)
+ (deps (package dune) (source_tree test-cases/github1019))
+ (action
+  (chdir
+   test-cases/github1019
+   (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
+
 (alias
  (name github20)
  (deps (package dune) (source_tree test-cases/github20))
@@ -743,6 +751,7 @@
   (alias findlib-error)
   (alias force-test)
   (alias gen-opam-install-file)
+  (alias github1019)
   (alias github20)
   (alias github24)
   (alias github25)
@@ -832,6 +841,7 @@
   (alias findlib-error)
   (alias force-test)
   (alias gen-opam-install-file)
+  (alias github1019)
   (alias github20)
   (alias github24)
   (alias github25)
diff --git a/test/blackbox-tests/test-cases/github1019/dune b/test/blackbox-tests/test-cases/github1019/dune
new file mode 100644
index 00000000..b1e70d55
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1019/dune
@@ -0,0 +1,5 @@
+(library (name foo))
+
+(alias
+ (name default)
+ (echo %{lib:foo:foo.ml}))
diff --git a/test/blackbox-tests/test-cases/github1019/dune-project b/test/blackbox-tests/test-cases/github1019/dune-project
new file mode 100644
index 00000000..b2559fa0
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1019/dune-project
@@ -0,0 +1 @@
+(lang dune 1.0)
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/github1019/foo.ml b/test/blackbox-tests/test-cases/github1019/foo.ml
new file mode 100644
index 00000000..0547b3d0
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1019/foo.ml
@@ -0,0 +1 @@
+let x = 1
diff --git a/test/blackbox-tests/test-cases/github1019/run.t b/test/blackbox-tests/test-cases/github1019/run.t
new file mode 100644
index 00000000..c31fc32a
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1019/run.t
@@ -0,0 +1,6 @@
+Regression test for #1019
+
+  $ dune build
+  File "dune", line 5, characters 9-10:
+  Error: This character is not allowed inside %{...} forms
+  [1]