diff --git a/.travis.yml b/.travis.yml
index b3e486b..2c38cc2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,10 @@
 #
 # Here we execute the Python 3.6 tests; Python 3.4 and 3.5 tests are run by
 # cibuildwheel, inside the manylinux1 Docker image.
+
+# We also run tests for memory leaks (which require a debug build of python)
+# using python3.4. Specifically we install python3.4-dbg, the only python3
+# runtime with debug support present on the travis-ci platform at the moment.
 #
 # See https://mail.python.org/pipermail/wheel-builders/2017-August/000285.html
 
@@ -21,6 +25,12 @@ matrix:
       python: "3.6"
       services:
         - docker
+    - sudo: required
+      language: python
+      python: "3.4"
+      services:
+        - docker
+      env: RUN_DEBUG_PYTHON=true
     - os: osx
       osx_image: xcode8.3
 
@@ -34,10 +44,23 @@ env:
 
 install:
   - if [ $TRAVIS_OS_NAME = osx ]; then brew upgrade python; fi
+  - |
+    if [ $RUN_DEBUG_PYTHON = true ]; then
+      sudo apt-get install python3.4-dbg
+      virtualenv -p python3.4-dbg /tmp/env
+      . /tmp/env/bin/activate
+    fi
   - pip3 install -r requirements-test.txt
 
 script:
-  - pip3 install . && pytest tests && cd docs; make doctest; cd -
+  - pip3 install .
+  - pytest tests
+  - pushd docs
+  - make doctest -e PYTHON=$(which python3)
+  - popd
+  # cibuildwheel's docker might get confused and throw an ImportMismatchError,
+  # so we remove bytecode files before running it.
+  - find . -name __pycache__ -exec rm -rf {} +
   - |
     pip3 install cibuildwheel==0.6.0
     cibuildwheel --output-dir wheelhouse
diff --git a/docs/dumps.rst b/docs/dumps.rst
index 0f074a9..b083d4f 100644
--- a/docs/dumps.rst
+++ b/docs/dumps.rst
@@ -294,9 +294,9 @@
 
    .. doctest::
 
-      >>> mode = DM_UNIX_TIME
+      >>> mode = DM_UNIX_TIME | DM_NAIVE_IS_UTC
       >>> dumps([now, now.date(), now.time()], datetime_mode=mode)
-      '[1472409071.084418,1472335200.0,73871.084418]'
+      '[1472409071.084418,1472342400.0,73871.084418]'
       >>> unixtime = float(dumps(now, datetime_mode=mode))
       >>> datetime.fromtimestamp(unixtime, here) == now
       True
@@ -306,9 +306,9 @@
 
    .. doctest::
 
-      >>> mode = DM_UNIX_TIME | DM_ONLY_SECONDS
+      >>> mode = DM_UNIX_TIME | DM_NAIVE_IS_UTC | DM_ONLY_SECONDS
       >>> dumps([now, now.date(), now.time()], datetime_mode=mode)
-      '[1472409071,1472335200,73871]'
+      '[1472409071,1472342400,73871]'
 
    It can be used combined with :data:`DM_SHIFT_TO_UTC` to obtain the timestamp of the
    corresponding UTC_ time:
diff --git a/rapidjson.cpp b/rapidjson.cpp
index 316e44e..fcd0d26 100644
--- a/rapidjson.cpp
+++ b/rapidjson.cpp
@@ -434,24 +434,26 @@ RawJSON_dealloc(RawJSON* self)
 }
 
 
-static int
-RawJSON_init(RawJSON* self, PyObject* args, PyObject* kwds)
+static PyObject*
+RawJSON_new(PyTypeObject* type, PyObject* args, PyObject* kwds)
 {
-    static char * kwlist[] = {
+    PyObject* self;
+    self = type->tp_alloc(type, 0);
+    static char* kwlist[] = {
         "value",
         NULL
     };
     PyObject* value = NULL;
 
     if (!PyArg_ParseTupleAndKeywords(args, kwds, "U", kwlist, &value))
-        return -1;
+        return NULL;
 
-    self->value = value;
-    Py_INCREF(self->value);
+    ((RawJSON*) self)->value = value;
 
-    return 0;
-}
+    Py_INCREF(value);
 
+    return self;
+}
 
 static PyMemberDef RawJSON_members[] = {
     {"value",
@@ -506,9 +508,9 @@ static PyTypeObject RawJSON_Type = {
     0,                              /* tp_descr_get */
     0,                              /* tp_descr_set */
     0,                              /* tp_dictoffset */
-    (initproc) RawJSON_init,        /* tp_init */
+    0,                              /* tp_init */
     0,                              /* tp_alloc */
-    PyType_GenericNew,              /* tp_new */
+    RawJSON_new,                    /* tp_new */
 };
 
 
diff --git a/requirements-test.txt b/requirements-test.txt
index 90566ee..3523458 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,2 +1,3 @@
 pytest >= 3
 pytz
+sphinx
diff --git a/tests/test_refs_count.py b/tests/test_refs_count.py
index 6f99ef9..4d9e921 100644
--- a/tests/test_refs_count.py
+++ b/tests/test_refs_count.py
@@ -160,3 +160,25 @@ class Foo:
         del value
     rc1 = sys.gettotalrefcount()
     assert (rc1 - rc0) < THRESHOLD
+
+
+@pytest.mark.skipif(not hasattr(sys, 'gettotalrefcount'), reason='Non-debug Python')
+def test_rawjson_constructor():
+    raw_json = rj.RawJSON('["foo", "bar"]')
+    rc0 = sys.gettotalrefcount()
+    for i in range(1000):
+        value = '"foobar"'
+        raw_json.__init__(value)
+        del value
+    rc1 = sys.gettotalrefcount()
+    assert (rc1 - rc0) < THRESHOLD
+
+
+@pytest.mark.skipif(not hasattr(sys, 'gettotalrefcount'), reason='Non-debug Python')
+def test_rawjson_new():
+    rc0 = sys.gettotalrefcount()
+    for i in range(1000):
+        raw_json = rj.RawJSON('["foo", "bar"]')
+        del raw_json
+    rc1 = sys.gettotalrefcount()
+    assert (rc1 - rc0) < THRESHOLD