diff --git a/tests/tests_unit/test_data_classes/test_capabilities.py b/tests/tests_unit/test_data_classes/test_capabilities.py
index 3839ff9d25..13d53b0a1c 100644
--- a/tests/tests_unit/test_data_classes/test_capabilities.py
+++ b/tests/tests_unit/test_data_classes/test_capabilities.py
@@ -249,13 +249,13 @@ def test_create_capability_forget_initializing_scope(self):
         assert grp1.dump() == grp2.dump()
 
     def test_create_capability_forget_initializing_scope__not_supported(self):
-        with pytest.raises(ValueError, match="^DataSetsAcl got an unknown scope"):
+        with pytest.raises(ValueError, match="DataSetsAcl got an unknown scope"):
             DataSetsAcl(actions=[DataSetsAcl.Action.Read], scope=CurrentUserScope)
 
-        with pytest.raises(ValueError, match="^DataSetsAcl got an unknown scope"):
+        with pytest.raises(ValueError, match="DataSetsAcl got an unknown scope"):
             DataSetsAcl(actions=[DataSetsAcl.Action.Read], scope=GroupsAcl.Scope.CurrentUser)
 
-        with pytest.raises(ValueError, match="^ExperimentsAcl got an unknown scope"):
+        with pytest.raises(ValueError, match="ExperimentsAcl got an unknown scope"):
             ExperimentsAcl(actions=[ExperimentsAcl.Action.Use], scope=AllScope)
 
 
@@ -412,8 +412,8 @@ def test_idscopes_camel_case():
     with pytest.raises(ValueError) as err:
         Capability.load(dct)
     assert err.value.args[0].startswith(
-        "DataSetsAcl got an unknown scope: IDScopeLowerCase(ids=[2495]), expected an instance of one of: "
-        "[DataSetsAcl.Scope.All, DataSetsAcl.Scope.ID]"
+        "Could not instantiate DataSetsAcl due to: DataSetsAcl got an unknown scope: IDScopeLowerCase(ids=[2495]), "
+        "expected an instance of one of: [DataSetsAcl.Scope.All, DataSetsAcl.Scope.ID]"
     )
 
 
diff --git a/tests/tests_unit/test_data_classes/test_groups.py b/tests/tests_unit/test_data_classes/test_groups.py
index 8ad5ef2518..48925fac99 100644
--- a/tests/tests_unit/test_data_classes/test_groups.py
+++ b/tests/tests_unit/test_data_classes/test_groups.py
@@ -5,6 +5,7 @@
 import pytest
 
 from cognite.client.data_classes import Group, GroupList
+from cognite.client.data_classes.capabilities import DataModelInstancesAcl
 
 
 def raw_groups():
@@ -39,6 +40,10 @@ def raw_groups():
 
 
 class TestGroups:
+    def test_group_init__accept_single_acl(self) -> None:
+        acl = DataModelInstancesAcl([DataModelInstancesAcl.Action.Write], DataModelInstancesAcl.Scope.All())
+        assert Group(name="a", capabilities=acl) == Group(name="a", capabilities=[acl])
+
     @pytest.mark.parametrize("raw", list(raw_groups()))
     def test_load_dump_unknown_group(self, raw: dict[str, Any]) -> None:
         group = Group.load(raw)