diff --git a/conda-recipe/meta.yaml b/conda-recipe/meta.yaml
index a13ba0b..ead0849 100644
--- a/conda-recipe/meta.yaml
+++ b/conda-recipe/meta.yaml
@@ -1,10 +1,10 @@
 package:
   name: nexusformat
-  version: "1.0.0"
+  version: "1.0.1"
 
 source:
   git_url: https://github.com/nexpy/nexusformat.git
-  git_tag: v1.0.0
+  git_tag: v1.0.1
 
 build:
   entry_points:
diff --git a/src/nexusformat/nexus/tree.py b/src/nexusformat/nexus/tree.py
index 4e111ee..15fc1a0 100644
--- a/src/nexusformat/nexus/tree.py
+++ b/src/nexusformat/nexus/tree.py
@@ -4438,24 +4438,18 @@ def __init__(self, *args, **kwargs):
             self._class = kwargs.pop("nxclass")
         if "group" in kwargs:
             self._group = kwargs.pop("group")
+        self._entries = None
         if "entries" in kwargs:
-            self._entries = {}
             for k, v in kwargs["entries"].items():
-                self._entries[k] = deepcopy(v)
+                self[k] = v
             del kwargs["entries"]
-        else:
-            self._entries = None
         if "attrs" in kwargs:
             self._attrs = AttrDict(self, attrs=kwargs["attrs"])
             del kwargs["attrs"]
         else:
             self._attrs = AttrDict(self)
         for k, v in kwargs.items():
-            try:
-                self[k] = v
-            except AttributeError:
-                raise NeXusError(
-                    "Keyword arguments must be valid NXobjects")
+            self[k] = v
         if self.nxclass.startswith("NX"):
             if self.nxname == "unknown" or self.nxname == "":
                 self._name = self.nxclass[2:]
diff --git a/tests/test_groups.py b/tests/test_groups.py
index afd7602..4f53456 100644
--- a/tests/test_groups.py
+++ b/tests/test_groups.py
@@ -40,6 +40,42 @@ def test_group_creation(field1, field2, field3):
     assert group3["g1"].nxgroup == group3
 
 
+def test_group_entries(field1, field2, field3, field4, arr1D, arr2D):
+
+    entries = {"f2": field2, "f3": arr1D, "s1": "string",
+               "g1": NXgroup(field3)}
+
+    group1 = NXgroup(field1, f4=field4, f5=arr2D, entries=entries)
+
+    assert "f1" in group1
+    assert "f2" in group1
+    assert "f3" in group1
+    assert "f4" in group1
+    assert "f5" in group1
+    assert "s1" in group1
+    assert "g1" in group1
+    assert "g1/f3" in group1
+
+    assert group1["f1"] == field1
+    assert group1["f2"] == field2
+    assert group1["f3"].nxdata.sum() == arr1D.sum()
+    assert group1["f4"].nxdata == field4.nxdata
+    assert group1["f5"].nxdata.sum() == arr2D.sum()
+    assert group1["s1"].nxdata == "string"
+    assert group1["g1/f3"] == field3
+
+
+def test_group_attrs():
+
+    group1 = NXgroup(attrs={"a": "b", "c": 1})
+
+    assert "a" in group1.attrs
+    assert "c" in group1.attrs
+
+    assert group1.attrs["a"] == "b"
+    assert group1.attrs["c"] == 1
+
+
 def test_group_insertion(field2):
 
     group1 = NXgroup()
@@ -50,7 +86,7 @@ def test_group_insertion(field2):
     assert len(group1) == 1
 
 
-def test_rename(field1):
+def test_group_rename(field1):
 
     group = NXgroup(field1)
 
@@ -82,13 +118,13 @@ def test_group_class():
 
 def test_group_components():
 
-    g1 = NXdata(name='g1')
-    g2 = NXdata(name='g2')
-    g3 = NXdata(name='g3')
+    g1 = NXdata(name="g1")
+    g2 = NXdata(name="g2")
+    g3 = NXdata(name="g3")
     group = NXentry(g1, g2, g3)
 
-    assert group.component('NXdata') == [group['g1'], group['g2'], group['g3']]
-    assert group.NXdata == [group['g1'], group['g2'], group['g3']]
+    assert group.component("NXdata") == [group["g1"], group["g2"], group["g3"]]
+    assert group.NXdata == [group["g1"], group["g2"], group["g3"]]
 
 
 def test_group_title():
@@ -102,24 +138,24 @@ def test_group_title():
 def test_group_move(field1):
 
     group = NXentry()
-    group['g1'] = NXgroup()
-    group['g1/f1'] = field1
-    group['g2'] = NXgroup()
-    group['g1'].move('f1', 'g2', name='f2')
+    group["g1"] = NXgroup()
+    group["g1/f1"] = field1
+    group["g2"] = NXgroup()
+    group["g1"].move("f1", "g2", name="f2")
 
-    assert 'g1/f1' not in group
-    assert 'g2/f2' in group
+    assert "g1/f1" not in group
+    assert "g2/f2" in group
 
-    group['g2'].move(group['g2/f2'], group['g1'], name='f1')
+    group["g2"].move(group["g2/f2"], group["g1"], name="f1")
 
-    assert 'g2/f2' not in group
-    assert 'g1/f1' in group
+    assert "g2/f2" not in group
+    assert "g1/f1" in group
 
-    group['g3'] = NXgroup()
-    group['g2/f2'] = NXlink(target='g1/f1')
-    group['g2'].move('f2', 'g3', name='f3')
+    group["g3"] = NXgroup()
+    group["g2/f2"] = NXlink(target="g1/f1")
+    group["g2"].move("f2", "g3", name="f3")
 
-    assert group['g3/f3'].nxlink == field1
+    assert group["g3/f3"].nxlink == field1
 
 
 def test_group_copy(tmpdir, field1):
@@ -130,7 +166,7 @@ def test_group_copy(tmpdir, field1):
 
     external_filename = os.path.join(tmpdir, "file2.nxs")
     external_root = NXroot(
-        NXentry(NXgroup(field1, name='g1', attrs={"a": "b"})))
+        NXentry(NXgroup(field1, name="g1", attrs={"a": "b"})))
     external_root.save(external_filename, mode="w")
 
     root["entry/g2"] = NXlink(target="entry/g1", file=external_filename)