diff --git a/tests/core/dune b/tests/core/dune
index e17dd3a6..89c12c06 100644
--- a/tests/core/dune
+++ b/tests/core/dune
@@ -6,5 +6,6 @@
  (preprocess
   (action
    (run %{project_root}/src/core/cpp/cpp.exe %{input-file})))
- (libraries containers containers.bencode containers.cbor containers.unix
+ (libraries containers containers.bencode containers.cbor
+            containers.unix containers.pp
    threads containers_testlib iter gen uutf csexp))
diff --git a/tests/core/t.ml b/tests/core/t.ml
index e5d27999..8508555a 100644
--- a/tests/core/t.ml
+++ b/tests/core/t.ml
@@ -1,5 +1,6 @@
 Containers_testlib.run_all ~descr:"containers"
   [
+    T_pp.get ();
     T_list.get ();
     T_array.get ();
     T_bool.get ();
diff --git a/tests/core/t_pp.ml b/tests/core/t_pp.ml
new file mode 100644
index 00000000..b782a942
--- /dev/null
+++ b/tests/core/t_pp.ml
@@ -0,0 +1,41 @@
+include (val Containers_testlib.make ~__FILE__ ())
+open Containers_pp
+
+let spf = Printf.sprintf
+
+let () =
+  eq "hello world" (Flatten.to_string @@ text "hello" ^ newline ^ text "world")
+
+let () =
+  eq ~name:"l1" ~printer:(spf "%S") "[0; 1; 2; 3;\n 4; 5; 6; 7;\n 8; 9]"
+    (let d = Dump.list (List.init 10 int) in
+     Pretty.to_string ~width:10 d)
+
+let () =
+  eq ~name:"l2" ~printer:(spf "%S")
+    "[[0; 1; 2; 3;\n\
+    \  4; 5];\n\
+    \ [1; 2; 3; 4;\n\
+    \  5; 6];\n\
+    \ [2; 3; 4; 5;\n\
+    \  6; 7];\n\
+    \ [3; 4; 5; 6;\n\
+    \  7; 8];\n\
+    \ [4; 5; 6; 7;\n\
+    \  8; 9];\n\
+    \ [5; 6; 7; 8;\n\
+    \  9; 10]]"
+    (let d =
+       Dump.list
+         (List.init 6 (fun i ->
+              Dump.list (List.init 6 (fun j -> int @@ (i + j)))))
+     in
+     Pretty.to_string ~width:10 d)
+
+let () =
+  eq ~name:"s1" ~printer:(spf "%S") "(foo\n bar\n baaz\n (g 42 10))"
+    (let d =
+       sexp_apply "foo"
+         [ text "bar"; text "baaz"; sexp_apply "g" [ int 42; int 10 ] ]
+     in
+     Pretty.to_string ~width:10 d)