diff --git a/test/blackbox-tests/dune.inc b/test/blackbox-tests/dune.inc
index 6b28d4c3ef5..e0587465bfa 100644
--- a/test/blackbox-tests/dune.inc
+++ b/test/blackbox-tests/dune.inc
@@ -503,6 +503,14 @@
    test-cases/github1616
    (progn (run %{exe:cram.exe} -test run.t) (diff? run.t run.t.corrected)))))
 
+(alias
+ (name github1811)
+ (deps (package dune) (source_tree test-cases/github1811))
+ (action
+  (chdir
+   test-cases/github1811
+   (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))
@@ -1317,6 +1325,7 @@
   (alias github1549)
   (alias github1560)
   (alias github1616)
+  (alias github1811)
   (alias github20)
   (alias github24)
   (alias github25)
@@ -1470,6 +1479,7 @@
   (alias github1549)
   (alias github1560)
   (alias github1616)
+  (alias github1811)
   (alias github20)
   (alias github24)
   (alias github25)
diff --git a/test/blackbox-tests/test-cases/github1811/dune b/test/blackbox-tests/test-cases/github1811/dune
new file mode 100644
index 00000000000..b33e1bf82e2
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1811/dune
@@ -0,0 +1,3 @@
+(library
+ (name foo)
+ (preprocess (action (with-stdout-to %{targets} (run cat %{input-file})))))
diff --git a/test/blackbox-tests/test-cases/github1811/dune-project b/test/blackbox-tests/test-cases/github1811/dune-project
new file mode 100644
index 00000000000..43a1282a9fa
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1811/dune-project
@@ -0,0 +1 @@
+(lang dune 1.7)
diff --git a/test/blackbox-tests/test-cases/github1811/foo.ml b/test/blackbox-tests/test-cases/github1811/foo.ml
new file mode 100644
index 00000000000..7fecab12d41
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1811/foo.ml
@@ -0,0 +1 @@
+let x = 42
diff --git a/test/blackbox-tests/test-cases/github1811/run.t b/test/blackbox-tests/test-cases/github1811/run.t
new file mode 100644
index 00000000000..4bea95b9a5f
--- /dev/null
+++ b/test/blackbox-tests/test-cases/github1811/run.t
@@ -0,0 +1,3 @@
+Check that %{targets} is forbidden in preprocessing actions
+
+  $ dune build @all