diff --git a/src/gspn/gspn.cpp b/src/gspn/gspn.cpp
index 99e0a0b..c6dba99 100644
--- a/src/gspn/gspn.cpp
+++ b/src/gspn/gspn.cpp
@@ -40,8 +40,8 @@ void define_gspn(py::module& m) {
         .def("set_name", &GSPNBuilder::setGspnName, "Set name of GSPN", "name"_a)
 
         // todo: boost::optional<uint64_t> capacity
-        //.def("add_place", &GSPNBuilder::addPlace, "Add a place to the GSPN", py::arg("capacity") = 1, py::arg("initialTokens") = 0, py::arg("name") = "")
-        //.def("set_place_layout_info", &GSPNBuilder::setPlaceLayoutInfo, "Set place layout information", py::arg("placeId"), py::arg("layoutInfo"))
+        .def("add_place", &GSPNBuilder::addPlace, "Add a place to the GSPN", py::arg("capacity") = 1, py::arg("initialTokens") = 0, py::arg("name") = "")
+        .def("set_place_layout_info", &GSPNBuilder::setPlaceLayoutInfo, "Set place layout information", py::arg("placeId"), py::arg("layoutInfo"))
 
         // does not work either:
         //.def("add_place", [](GSPNBuilder& b, boost::optional<uint64_t> capacity = boost::optional<uint64_t>(1), uint_fast64_t const& initialTokens = 0, std::string const& name = "") {
@@ -51,7 +51,7 @@ void define_gspn(py::module& m) {
 
          // todo: problem with boost::optional<uint64_t> + write tests:
         .def("add_timed_transition", py::overload_cast<uint_fast64_t const&, double const& , std::string const&>(&GSPNBuilder::addTimedTransition), "Adds an timed transition to the GSPN", "priority"_a, "rate"_a, "name"_a = "")
-        .def("add_timed_transition", py::overload_cast<uint_fast64_t const&, double const& , boost::optional<uint64_t>, std::string const&>(&GSPNBuilder::addTimedTransition), "Adds an timed transition to the GSPN", "priority"_a, "rate"_a, "numServers"_a, "name"_a = "")
+        .def("add_timed_transition", py::overload_cast<uint_fast64_t const&, double const& , boost::optional<uint64_t> const&, std::string const&>(&GSPNBuilder::addTimedTransition), "Adds an timed transition to the GSPN", "priority"_a, "rate"_a, "numServers"_a, "name"_a = "")
         .def("set_transition_layout_info", &GSPNBuilder::setTransitionLayoutInfo, "set transition layout information", "transitionId"_a, "layoutInfo"_a)
 
         // todo write tests
diff --git a/tests/gspn/test_gspn.py b/tests/gspn/test_gspn.py
index 7da5ecd..c1ebcd1 100644
--- a/tests/gspn/test_gspn.py
+++ b/tests/gspn/test_gspn.py
@@ -32,8 +32,8 @@ class TestGSPNBuilder:
         assert place.has_restricted_capacity() == False
         # todo this does not work (boost::optional<uint64_t> problem?):
         place.set_capacity(cap = 5)
-        # assert place.has_restricted_capacity() == True
-        # assert place.get_capacity() == 5
+        assert place.has_restricted_capacity() == True
+        assert place.get_capacity() == 5
 
         p_name = "P_0"
         place.set_name(name = p_name)
@@ -44,7 +44,7 @@ class TestGSPNBuilder:
         assert place.get_number_of_initial_tokens() == p_tokens
 
     def test_transition(self):
-        # test TimedTrasnition
+        # test TimedTransition
         tt = stormpy.gspn.TimedTransition()
         tt_name = " tt"
         tt.set_name(tt_name)
@@ -72,17 +72,17 @@ class TestGSPNBuilder:
         builder.set_name(gspn_name)
 
         # todo place tests, set_place_layout_info (boost)
-        # p_0 = builder.add_place()
-        # p_1 = builder.add_place(capacity = 2, initialTokens = 0, name = "place_test")
-        # p_layout = stormpy.gspn.LayoutInfo(1, 2)
-        # builder.set_place_layout_info(p_0, t_layout)
+        p_0 = builder.add_place()
+        p_1 = builder.add_place(capacity = 2, initialTokens = 0, name = "place_test")
+        p_layout = stormpy.gspn.LayoutInfo(1, 2)
+        builder.set_place_layout_info(p_0, p_layout)
 
         ti_0 = builder.add_immediate_transition(priority=1, weight=0.5, name="ti_0")
         ti_1 = builder.add_immediate_transition()
 
         tt_0 = builder.add_timed_transition(priority=2, rate=0.4, name="tt_0")
         # todo problems with sumServers (boost)
-        # tt_1 = builder.add_timed_transition(priority=0, rate=0.5, numServers=2, name="tt_1")
+        tt_1 = builder.add_timed_transition(priority=0, rate=0.5, numServers=2, name="tt_1")
 
         # todo tests for add_ (add_place needed)
         # builder.add_input_arc(ti_id_0, ti_id_1, multiplicity = 2)
@@ -96,8 +96,8 @@ class TestGSPNBuilder:
 
         assert gspn.get_name() == gspn_name
         assert gspn.get_number_of_immediate_transitions() == 2
-        # assert gspn.get_number_of_timed_transitions() == 2
-        # assert gspn.get_number_of_places() == 2
+        assert gspn.get_number_of_timed_transitions() == 2
+        assert gspn.get_number_of_places() == 2
         cp_ti_0 = gspn.get_immediate_transition("ti_0")
         assert cp_ti_0.get_id() == ti_0
         assert cp_ti_0.get_weight() == 0.5
@@ -106,9 +106,9 @@ class TestGSPNBuilder:
         assert cp_tt_0.get_id() == tt_0
         assert cp_tt_0.get_rate() == 0.4
         assert cp_tt_0.get_priority() == 2
-        # cp_p_0 = gspn.get_immediate_transition("p_0")
-        # assert cp_p_0.get_id() == p_0
-        # assert cp_p_0.get_capacity() == 2
+        cp_p_1 = gspn.get_place("place_test")
+        assert cp_p_1.get_id() == p_1
+        assert cp_p_1.get_capacity() == 2
 
         gspn_new_name = "new_name"
         gspn.set_name(gspn_new_name)
@@ -163,7 +163,3 @@ class TestGSPNBuilder:
         cp_ti_0 = gspn_import.get_immediate_transition("ti_0")
         assert cp_ti_0.get_id() == ti_0
 
-
-
-
-