diff --git a/.github/workflows/run-mayavi-tests.yml b/.github/workflows/run-mayavi-tests.yml
index 807e72b8..2c9a7f7d 100644
--- a/.github/workflows/run-mayavi-tests.yml
+++ b/.github/workflows/run-mayavi-tests.yml
@@ -84,6 +84,7 @@ jobs:
       QT_API: ${{ matrix.qt-api }}
       TVTK_VERBOSE: 'true'
       VTK_PARSER_VERBOSE: 'true'
+      PYTHONUNBUFFERED: '1'
 
     steps:
     - uses: actions/checkout@v4
diff --git a/tvtk/tests/test_tvtk.py b/tvtk/tests/test_tvtk.py
index 8de94a5a..8fe7f5b6 100644
--- a/tvtk/tests/test_tvtk.py
+++ b/tvtk/tests/test_tvtk.py
@@ -910,6 +910,8 @@ def get_min_max_value(vtk_klass, vtk_attr_name):
                         setattr(obj, trait_name, (min_value-1, max_value))
                     with self.assertRaises(TraitError):
                         setattr(obj, trait_name, (min_value, max_value+1))
+        if on_gha:
+            print("::endgroup::")
 
     def test_no_trait_has_ptr_address_as_value(self):
         '''Test if none of the TVTK classes' traits has a value of "*_p_void"
@@ -954,7 +956,7 @@ def test_all_traits_can_be_obtained(self):
                 obj = getattr(tvtk, tvtk_klass_name)()
             except Exception:
                 # testing for instantiation is above
-                pass
+                continue
 
             for trait_name in obj._full_traitnames_list_:
                 try: