diff --git a/.travis-ci.sh b/.travis-ci.sh
index 638a81bb..cadcc2b5 100644
--- a/.travis-ci.sh
+++ b/.travis-ci.sh
@@ -46,7 +46,7 @@ case "$TARGET" in
         rm -rf ~/.opam
         opam init --yes
         eval $(opam config env)
-        opam install menhir ocaml-migrate-parsetree js_of_ocaml-ppx --yes
+        opam install reason menhir ocaml-migrate-parsetree js_of_ocaml-ppx --yes
         opam remove jbuilder `opam list --depends-on jbuilder --installed --short` --yes
       fi
       cp -a ~/.opam ~/.opam-start
@@ -73,7 +73,7 @@ case "$TARGET" in
       opam list
       echo "version: \"1.0+dev$DATE\"" >> jbuilder.opam
       opam pin add jbuilder . --no-action --yes
-      opam install ocaml-migrate-parsetree js_of_ocaml-ppx --yes
+      opam install reason ocaml-migrate-parsetree js_of_ocaml-ppx --yes
       echo -en "travis_fold:end:opam.deps\r"
     fi
     echo -en "travis_fold:start:jbuilder.bootstrap\r"
diff --git a/test/blackbox-tests/jbuild b/test/blackbox-tests/jbuild
index 081f2e7e..90bbdf30 100644
--- a/test/blackbox-tests/jbuild
+++ b/test/blackbox-tests/jbuild
@@ -106,3 +106,10 @@
   (action
      (chdir test-cases/gen-opam-install-file
   (setenv JBUILDER ${bin:jbuilder} (run ${exe:cram.exe} run.t))))))
+
+(alias
+ ((name runtest)
+  (deps ((files_recursively_in test-cases/reason)))
+  (action
+   (chdir test-cases/reason
+    (setenv JBUILDER ${bin:jbuilder} (run ${exe:cram.exe} run.t))))))
diff --git a/test/blackbox-tests/test-cases/reason/bar.mli b/test/blackbox-tests/test-cases/reason/bar.mli
new file mode 100644
index 00000000..c05e8c6e
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/bar.mli
@@ -0,0 +1 @@
+val y : unit -> int
diff --git a/test/blackbox-tests/test-cases/reason/bar.re b/test/blackbox-tests/test-cases/reason/bar.re
new file mode 100644
index 00000000..2e0c74a1
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/bar.re
@@ -0,0 +1 @@
+let y = () => 42;
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/reason/foo.ml b/test/blackbox-tests/test-cases/reason/foo.ml
new file mode 100644
index 00000000..5384d88f
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/foo.ml
@@ -0,0 +1 @@
+let x = 43
diff --git a/test/blackbox-tests/test-cases/reason/foo.rei b/test/blackbox-tests/test-cases/reason/foo.rei
new file mode 100644
index 00000000..86982fe0
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/foo.rei
@@ -0,0 +1 @@
+let x : int
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/reason/hello.re b/test/blackbox-tests/test-cases/reason/hello.re
new file mode 100644
index 00000000..cc78fee1
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/hello.re
@@ -0,0 +1,4 @@
+
+let hw = fun () => "hello world";
+
+print_endline(hw());
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/reason/hello.rei b/test/blackbox-tests/test-cases/reason/hello.rei
new file mode 100644
index 00000000..660a0366
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/hello.rei
@@ -0,0 +1,2 @@
+
+let hw : unit => string;
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/reason/jbuild b/test/blackbox-tests/test-cases/reason/jbuild
new file mode 100644
index 00000000..63d27d13
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/jbuild
@@ -0,0 +1,14 @@
+(jbuild_version 1)
+
+(rule (copy pped.pp.re pped.re))
+(rule (copy pped.rei.pp pped.rei))
+
+(library
+ ((name rlib)
+  (public_name rlib)))
+
+;; we want to make sure that .rei files are present
+(alias
+ ((name runtest)
+  (deps (rlib.install))
+  (action (echo "${read:rlib.install}"))))
diff --git a/test/blackbox-tests/test-cases/reason/pped.pp.re b/test/blackbox-tests/test-cases/reason/pped.pp.re
new file mode 100644
index 00000000..e31cf161
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/pped.pp.re
@@ -0,0 +1 @@
+let y = 56;
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/reason/pped.rei.pp b/test/blackbox-tests/test-cases/reason/pped.rei.pp
new file mode 100644
index 00000000..48599953
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/pped.rei.pp
@@ -0,0 +1 @@
+let y : int
\ No newline at end of file
diff --git a/test/blackbox-tests/test-cases/reason/rlib.opam b/test/blackbox-tests/test-cases/reason/rlib.opam
new file mode 100644
index 00000000..e69de29b
diff --git a/test/blackbox-tests/test-cases/reason/run.t b/test/blackbox-tests/test-cases/reason/run.t
new file mode 100644
index 00000000..fafa5b56
--- /dev/null
+++ b/test/blackbox-tests/test-cases/reason/run.t
@@ -0,0 +1,58 @@
+  $ $JBUILDER runtest -j1 --root .
+         refmt bar.re.ml
+         refmt hello.re.ml
+         refmt pped.re.ml
+        ocamlc rlib.{cmi,cmo,cmt}
+         refmt foo.re.mli
+         refmt hello.re.mli
+         refmt pped.re.mli
+      ocamldep rlib.depends.ocamldep-output
+      ocamlopt rlib.{cmx,o}
+      ocamldep rlib.dependsi.ocamldep-output
+        ocamlc rlib__Bar.{cmi,cmti}
+        ocamlc rlib__Foo.{cmi,cmti}
+        ocamlc rlib__Hello.{cmi,cmti}
+        ocamlc rlib__Pped.{cmi,cmti}
+        ocamlc rlib__Bar.{cmo,cmt}
+      ocamlopt rlib__Bar.{cmx,o}
+        ocamlc rlib__Foo.{cmo,cmt}
+      ocamlopt rlib__Foo.{cmx,o}
+        ocamlc rlib__Hello.{cmo,cmt}
+      ocamlopt rlib__Hello.{cmx,o}
+        ocamlc rlib__Pped.{cmo,cmt}
+      ocamlopt rlib__Pped.{cmx,o}
+        ocamlc rlib.cma
+      ocamlopt rlib.{a,cmxa}
+      ocamlopt rlib.cmxs
+  lib: [
+    "_build/install/default/lib/rlib/META" {"META"}
+    "_build/install/default/lib/rlib/opam" {"opam"}
+    "_build/install/default/lib/rlib/rlib__Bar.cmi"
+    "_build/install/default/lib/rlib/rlib__Bar.cmx"
+    "_build/install/default/lib/rlib/rlib__Bar.cmt"
+    "_build/install/default/lib/rlib/rlib__Bar.cmti"
+    "_build/install/default/lib/rlib/bar.mli"
+    "_build/install/default/lib/rlib/rlib__Foo.cmi"
+    "_build/install/default/lib/rlib/rlib__Foo.cmx"
+    "_build/install/default/lib/rlib/rlib__Foo.cmt"
+    "_build/install/default/lib/rlib/rlib__Foo.cmti"
+    "_build/install/default/lib/rlib/foo.rei"
+    "_build/install/default/lib/rlib/rlib__Hello.cmi"
+    "_build/install/default/lib/rlib/rlib__Hello.cmx"
+    "_build/install/default/lib/rlib/rlib__Hello.cmt"
+    "_build/install/default/lib/rlib/rlib__Hello.cmti"
+    "_build/install/default/lib/rlib/hello.rei"
+    "_build/install/default/lib/rlib/rlib__Pped.cmi"
+    "_build/install/default/lib/rlib/rlib__Pped.cmx"
+    "_build/install/default/lib/rlib/rlib__Pped.cmt"
+    "_build/install/default/lib/rlib/rlib__Pped.cmti"
+    "_build/install/default/lib/rlib/pped.rei"
+    "_build/install/default/lib/rlib/rlib.cmi"
+    "_build/install/default/lib/rlib/rlib.cmx"
+    "_build/install/default/lib/rlib/rlib.cmt"
+    "_build/install/default/lib/rlib/rlib.ml-gen"
+    "_build/install/default/lib/rlib/rlib.cma"
+    "_build/install/default/lib/rlib/rlib.cmxa"
+    "_build/install/default/lib/rlib/rlib.a"
+    "_build/install/default/lib/rlib/rlib.cmxs"
+  ]