diff --git a/pyproject.toml b/pyproject.toml
index a78776df..c3fb8391 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "xcoll"
-version = "0.5.10"
+version = "0.5.11"
 description = "Xsuite collimation package"
 homepage = "https://github.com/xsuite/xcoll"
 repository = "https://github.com/xsuite/xcoll"
@@ -26,16 +26,16 @@ ruamel-yaml = { version = "^0.17.31", optional = true }
 numpy = ">=1.0"
 pandas = ">=1.4"
 xobjects = ">=0.4.5"
-xdeps = ">=0.7.4"
-xpart = ">=0.19.1"
-xtrack = ">=0.69.7"
+xdeps = ">=0.8.1"
+xpart = ">=0.19.3"
+xtrack = ">=0.70.3"
 
 [tool.poetry.dev-dependencies]
 pytest = ">=7.3"
 xaux = ">=0.2.1"
 
 [tool.poetry.extras]
-tests = ["pytest", "ruamel-yaml"]
+tests = ["pytest", "ruamel-yaml", "pytest-html", "pytest-xdist"]
 
 [build-system]
 # Needed for pip install -e (BTW: need pip version 22)
diff --git a/tests/data/assert_listing.py b/tests/data/assert_listing.py
index 47ad0010..bd4ba76e 100755
--- a/tests/data/assert_listing.py
+++ b/tests/data/assert_listing.py
@@ -6,6 +6,7 @@
 import sys
 from pathlib import Path
 
+from xobjects.context import get_test_contexts
 
 path = Path(__file__).parent
 
@@ -25,9 +26,14 @@ def pytest_collection_modifyitems(self, session, config, items):
     with contextlib.redirect_stdout(open(os.devnull, 'w')):
         pytest.main(["--collect-only"], plugins=[TestCollector()])
 
+    # do not keep GPU contexts as tests in the listing, as the names can change
+    collected_tests = [tst for tst in collected_tests
+                       if 'Context' not in tst or 'ContextCpu' in tst]
+
     return set(collected_tests)
 
 current_tests = _collect_tests()
+# available_contexts = [ctx.__class__.__name__ for ctx in get_test_contexts()]
 with open(path / 'all_tests.list', 'r') as fid:
     expected_tests = set([line.replace('\n', '') for line in fid.readlines()])
 only_current = current_tests.difference(expected_tests)
diff --git a/tests/data/colldb_lhc_run3_ir7.yaml b/tests/data/colldb_lhc_run3_ir7.yaml
index 3b494056..5f1703b5 100644
--- a/tests/data/colldb_lhc_run3_ir7.yaml
+++ b/tests/data/colldb_lhc_run3_ir7.yaml
@@ -15,7 +15,7 @@ emittance:
 collimators:
   b1:
     tcp.d6l7.b1:        { <<: *TCP7,   angle:  90,    material: MoGR, length: 1.565  }
-    tcp.c6l7.b1:        { <<: *TCP7,   angle:   0,    material: MoGR, tilt: [-250e-6, 250e-6]  }
+    tcp.c6l7.b1:        { <<: *TCP7,   angle:   0,    material: MoGR, tilt: [2.5e-6, -2.5e-6]  }
     tcp.b6l7.b1:        { <<: *TCP7,   angle: 127.5   }
     tcsg.a6l7.b1:       { <<: *TCSG7,  angle: 141.1   }
     tcpcv.a6l7.b1:      { <<: *CRY7,   angle:  90,    bending_radius: 85.10,  width: 5.0e-3,  height: 30.0e-3  }
@@ -29,7 +29,7 @@ collimators:
 
   b2:
     tcp.d6r7.b2:        { <<: *TCP7,   angle:  90,    material: MoGR, length: 1.565  }
-    tcp.c6r7.b2:        { <<: *TCP7,   angle:   0,    material: MoGR, tilt: [-250e-6, 250e-6]  }
+    tcp.c6r7.b2:        { <<: *TCP7,   angle:   0,    material: MoGR, tilt: [2.5e-6, -2.5e-6]  }
     tcp.b6r7.b2:        { <<: *TCP7,   angle: 127.5   }
     tcsg.a6r7.b2:       { <<: *TCSG7,  angle: 141.1   }
     tcpcv.a6r7.b2:      { <<: *CRY7,   angle:  90,    bending_radius: 74.88,  width: 5.0e-3,  height: 30.0e-3  }
diff --git a/tests/data/store_all_tests.py b/tests/data/store_all_tests.py
index 1239f17b..f8bcbfce 100755
--- a/tests/data/store_all_tests.py
+++ b/tests/data/store_all_tests.py
@@ -25,6 +25,10 @@ def pytest_collection_modifyitems(self, session, config, items):
 with contextlib.redirect_stdout(open(os.devnull, 'w')):
     pytest.main(["--collect-only"], plugins=[TestCollector()])
 
+# do not keep GPU contexts as tests in the listing, as the names can change
+collected_tests = [tst for tst in collected_tests
+                    if 'Context' not in tst or 'ContextCpu' in tst]
+
 with open(path / 'all_tests.list', 'w') as fid:
     for line in collected_tests:
         fid.write(f"{line}\n")
diff --git a/tests/run_all.sh b/tests/run_all.sh
index fbade8e0..38ca8b84 100755
--- a/tests/run_all.sh
+++ b/tests/run_all.sh
@@ -13,7 +13,7 @@ then
     xsuite-prebuild r
     # "xsuite-prebuild c" to remove kernels
     echo "done."
-    pytest -n 10 -vv --html="pytest_results.html" --self-contained-html
+    pytest -n 13 -vv --html="pytest_results.html" --self-contained-html
 else
     echo "Not all tests are verified. Aborting."
     exit 1
diff --git a/tests/test_elements.py b/tests/test_elements.py
index 17110aa8..4925c27d 100644
--- a/tests/test_elements.py
+++ b/tests/test_elements.py
@@ -64,7 +64,7 @@
     {'field': 'record_exits',       'val':  True,  'expected': {'record_impacts': True,  'record_exits': True,  'record_scatterings': True,  '_record_interactions': 7}}
 ]
 base_user_fields = {}
-base_user_fields_read_only = []
+base_user_fields_read_only = ['gemitt_x', 'gemitt_y']
 
 # BaseCollimator
 base_coll_fields = {**base_fields,
diff --git a/tests/test_lossmap.py b/tests/test_lossmap.py
index 559486c2..c335b88c 100644
--- a/tests/test_lossmap.py
+++ b/tests/test_lossmap.py
@@ -24,7 +24,7 @@
                             [2, 'V', 500, 0.3, True],
                             [1, 'V', 3500, 0.1, False],
                             [2, 'H', 30000, 0.15, False]
-                        ], ids=["B1", "B2V", "B1V_crystals", "B2H_crystals"])
+                        ], ids=["B1H", "B2V", "B1V_crystals", "B2H_crystals"])
 def test_run_lossmap(beam, plane, npart, interpolation, ignore_crystals, test_context):
 
     line = xt.Line.from_json(path / f'sequence_lhc_run3_b{beam}.json')
@@ -45,12 +45,15 @@ def test_run_lossmap(beam, plane, npart, interpolation, ignore_crystals, test_co
     line.scattering.enable()
     line.track(part, num_turns=2)
     line.scattering.disable()
+    assert_lossmap(beam, npart, line, part, tcp, interpolation, ignore_crystals, 'EverestCollimator', 'EverestCrystal')
 
-    line_is_reversed = True if beam == 2 else False
-    with flaky_assertions():
 
+def assert_lossmap(beam, npart, line, part, tcp, interpolation, ignore_crystals, coll_cls, cry_cls):
+    with flaky_assertions():
+        line_is_reversed = True if beam == 2 else False
         ThisLM = xc.LossMap(line, line_is_reversed=line_is_reversed, part=part,
                          interpolation=interpolation)
+        print(ThisLM.summary)
 
         ThisLM.to_json("lossmap.json")
         assert Path("lossmap.json").exists()
@@ -65,9 +68,10 @@ def test_run_lossmap(beam, plane, npart, interpolation, ignore_crystals, test_co
         # TODO: check the lossmap quantitaively: rough amount of losses at given positions
         summ = ThisLM.summary
         assert list(summ.columns) == ['collname', 'nabs', 'length', 's', 'type']
-        assert len(summ[summ.type=='EverestCollimator']) == 10
+        assert len(summ[summ.type==coll_cls]) == 10
         if not ignore_crystals:
-            assert len(summ[summ.type=='EverestCrystal']) == 2
+            assert len(summ[summ.type==cry_cls]) == 2
+
         # We want at least 5% absorption on the primary
         assert summ.loc[summ.collname==tcp,'nabs'].values[0] > 0.05*npart
 
@@ -94,5 +98,3 @@ def test_run_lossmap(beam, plane, npart, interpolation, ignore_crystals, test_co
             assert np.all([s < lm['machine_length'] for s in lm['aperture']['s']])
         assert lm['interpolation'] == interpolation
         assert lm['reversed'] == line_is_reversed
-
-
diff --git a/tests/test_version.py b/tests/test_version.py
index 5bf4e1aa..b59f0fc0 100644
--- a/tests/test_version.py
+++ b/tests/test_version.py
@@ -6,4 +6,4 @@
 from xcoll import __version__
 
 def test_version():
-    assert __version__ == '0.5.10'
+    assert __version__ == '0.5.11'
diff --git a/xcoll/beam_elements/base.py b/xcoll/beam_elements/base.py
index 634ad3b0..78a8b457 100644
--- a/xcoll/beam_elements/base.py
+++ b/xcoll/beam_elements/base.py
@@ -12,8 +12,8 @@
 from ..general import _pkg_root
 
 
-OPEN_JAW = 3.
-OPEN_GAP = 999.
+OPEN_JAW = 3
+OPEN_GAP = 999
 
 
 class InvalidXcoll(xt.BeamElement):
@@ -659,6 +659,11 @@ def nemitt_x(self, val):
         self._nemitt_x = val
         self._apply_optics()
 
+    @property
+    def gemitt_x(self):
+        if self.nemitt_x is not None and self.optics_ready():
+            return self.nemitt_x / self.optics['beta_gamma_rel']
+
     @property
     def nemitt_y(self):
         if self._nemitt_y == 0:
@@ -674,6 +679,11 @@ def nemitt_y(self, val):
         self._nemitt_y = val
         self._apply_optics()
 
+    @property
+    def gemitt_y(self):
+        if self.nemitt_y is not None and self.optics_ready():
+            return self.nemitt_y / self.optics['beta_gamma_rel']
+
     @property
     def emittance(self):
         if self.nemitt_x is not None and self.nemitt_y is not None:
@@ -734,8 +744,8 @@ def divergence(self):
             alfy = self.optics[self.align]['alfy'][0]
             betx = self.optics[self.align]['betx'][0]
             bety = self.optics[self.align]['bety'][0]
-            divx = -np.sqrt(self.nemitt_x/self.optics['beta_gamma_rel']/betx)*alfx
-            divy = -np.sqrt(self.nemitt_y/self.optics['beta_gamma_rel']/bety)*alfy
+            divx = -np.sqrt(self.gemitt_x/betx)*alfx
+            divy = -np.sqrt(self.gemitt_y/bety)*alfy
             if hasattr(self, '_cos_zL'):
                 if self.side != 'right':
                     return divx if abs(self.angle_L) < 1e-6 else divy
@@ -1256,6 +1266,10 @@ def nemitt_x(self):
     def nemitt_x(self, val):
         BaseCollimator.nemitt_x.fset(self, val)
 
+    @property
+    def gemitt_x(self):
+        return BaseCollimator.gemitt_x.fget(self)
+
     @property
     def nemitt_y(self):
         return BaseCollimator.nemitt_y.fget(self)
@@ -1264,6 +1278,10 @@ def nemitt_y(self):
     def nemitt_y(self, val):
         BaseCollimator.nemitt_y.fset(self, val)
 
+    @property
+    def gemitt_y(self):
+        return BaseCollimator.gemitt_y.fget(self)
+
     @property
     def emittance(self):
         return BaseCollimator.emittance.fget(self)
diff --git a/xcoll/general.py b/xcoll/general.py
index 2e9458ee..d1250bdb 100644
--- a/xcoll/general.py
+++ b/xcoll/general.py
@@ -12,5 +12,5 @@
 # ======================
 # Do not change
 # ======================
-__version__ = '0.5.10'
+__version__ = '0.5.11'
 # ======================
diff --git a/xcoll/initial_distribution.py b/xcoll/initial_distribution.py
index 7c1e8ada..f3d55c76 100644
--- a/xcoll/initial_distribution.py
+++ b/xcoll/initial_distribution.py
@@ -57,8 +57,14 @@ def generate_pencil_on_collimator(line, name, num_particles, *, side='+-', penci
     if twiss is None:
         twiss = line.twiss()
 
-    # Is it converging or diverging?    # TODO: This might change with a tilt!!!!!!
-    is_converging  = twiss[f'alf{plane}', name] > 0
+    # Is it converging or diverging?
+    # TODO: dispersion might change this
+    # TODO: this should be checked jaw by jaw (we are currently checking the left jaw - watch out for sign of tilt of right jaw)
+    # TODO: skew collimators
+    tilt = coll.tilt[0] if isinstance(coll.tilt, list) else coll.tilt
+    betatron_angle = coll.gap * coll.divergence
+    tolerance_tilt = 1e-12 # 0.1 urad tolerance on jaw tilt  =>  we prioritise converging
+    is_converging = tilt + tolerance_tilt >= betatron_angle
     print(f"Collimator {name} is {'con' if is_converging else 'di'}verging.")
 
     beam_sizes = twiss.get_beam_covariance(nemitt_x=coll.nemitt_x, nemitt_y=coll.nemitt_y)
diff --git a/xcoll/line_tools.py b/xcoll/line_tools.py
index d7721146..ad7c35ea 100644
--- a/xcoll/line_tools.py
+++ b/xcoll/line_tools.py
@@ -33,7 +33,7 @@ def enable(self):
                     if nemitt_y is None:
                         nemitt_y = el.nemitt_y
                     if not np.isclose(el.nemitt_x, nemitt_x) \
-                    or not np.isclose(el.nemitt_x, nemitt_x):
+                    or not np.isclose(el.nemitt_y, nemitt_y):
                         raise ValueError("Not all collimators have the same "
                                     + "emittance. This is not supported.")
                 if hasattr(el, 'enable_scattering'):
@@ -243,7 +243,7 @@ def assign_optics(self, *, nemitt_x=None, nemitt_y=None, twiss=None, tw=None):
         tw_upstream, tw_downstream = self.get_optics_at(names, twiss=twiss)
         beta_gamma_rel = self.line.particle_ref._xobject.gamma0[0]*self.line.particle_ref._xobject.beta0[0]
         for coll in names:
-            self.line[coll].assign_optics(name=coll, nemitt_x=nemitt_x, nemitt_y=nemitt_x, twiss_upstream=tw_upstream,
+            self.line[coll].assign_optics(name=coll, nemitt_x=nemitt_x, nemitt_y=nemitt_y, twiss_upstream=tw_upstream,
                                     twiss_downstream=tw_downstream, beta_gamma_rel=beta_gamma_rel)
 
     def open(self, names=None):
@@ -282,22 +282,22 @@ def _get_s_start(self, name, *, length, table=None):
 
 def assign_optics_to_collimators(line, nemitt_x=None, nemitt_y=None, twiss=None):
     warn("The function xcoll.assign_optics_to_collimators() is deprecated and will be "
-       + "removed in the future. Please use line.scattering.assign_optics() instead.", FutureWarning)
+       + "removed in the future. Please use line.collimators.assign_optics() instead.", FutureWarning)
     line.collimators.assign_optics(nemitt_x=nemitt_x, nemitt_y=nemitt_y, twiss=twiss)
 
 def get_optics_at(names, *, twiss=None, line=None):
     warn("The function xcoll.get_optics_at() is deprecated and will be "
-       + "removed in the future. Please use line.scattering.get_optics_at() instead.", FutureWarning)
+       + "removed in the future. Please use line.collimators.get_optics_at() instead.", FutureWarning)
     return line.collimators.get_optics_at(names=names, twiss=twiss)
 
 def open_collimators(line, names=None):
     warn("The function xcoll.open_collimators() is deprecated and will be "
-       + "removed in the future. Please use line.scattering.open_collimators() instead.", FutureWarning)
+       + "removed in the future. Please use line.collimators.open_collimators() instead.", FutureWarning)
     line.collimators.open(names=names)
 
 def send_to_parking(line, names=None):
     warn("The function xcoll.send_to_parking() is deprecated and will be "
-       + "removed in the future. Please use line.scattering.send_to_parking() instead.", FutureWarning)
+       + "removed in the future. Please use line.collimators.send_to_parking() instead.", FutureWarning)
     line.collimators.to_parking(names=names)
 
 def enable_scattering(line):