diff --git a/spacy/gold/new_example.pyx b/spacy/gold/new_example.pyx
index 4247f21b5..fa50e4369 100644
--- a/spacy/gold/new_example.pyx
+++ b/spacy/gold/new_example.pyx
@@ -146,6 +146,8 @@ def _fix_legacy_dict_data(predicted, example_dict):
             ent_iobs, ent_types = _parse_ner_tags(predicted, words, value)
             token_dict["ENT_IOB"] = ent_iobs
             token_dict["ENT_TYPE"] = ent_types
+        else:
+            raise ValueError(f"Unknown attr: {key}")
     return {
         "token_annotation": token_dict,
         "doc_annotation": doc_dict
diff --git a/spacy/tests/test_gold.py b/spacy/tests/test_gold.py
index 3c13259ba..f60f52e6e 100644
--- a/spacy/tests/test_gold.py
+++ b/spacy/tests/test_gold.py
@@ -531,4 +531,4 @@ def test_tuples_to_example(vocab, merged_dict):
     assert tags == merged_dict["tags"]
     sent_starts = [token.is_sent_start for token in ex.reference]
     assert sent_starts == [bool(v) for v in merged_dict["sent_starts"]]
-    example.reference.cats == cats
+    ex.reference.cats == cats
diff --git a/spacy/tests/test_new_example.py b/spacy/tests/test_new_example.py
index 473666eca..a8651dfee 100644
--- a/spacy/tests/test_new_example.py
+++ b/spacy/tests/test_new_example.py
@@ -14,21 +14,25 @@ def test_Example_init_requires_doc_objects():
         eg = Example(None, Doc(vocab, words=["hi"]))
 
 
-
 def test_Example_from_dict_basic():
     eg = Example.from_dict(
-        Doc(Vocab(), words=["hello", "world"]),
-        {
-            "words": ["hello", "world"]
-        }
+        Doc(Vocab(), words=["hello", "world"]), {"words": ["hello", "world"]}
     )
     assert isinstance(eg.x, Doc)
     assert isinstance(eg.y, Doc)
 
 
-@pytest.mark.parametrize("annots", [
-    {"words": ["ice", "cream"], "tags": ["NN", "NN"]},
-])
+@pytest.mark.parametrize(
+    "annots", [{"words": ["ice", "cream"], "weirdannots": ["something", "such"]}]
+)
+def test_Example_from_dict_invalid(annots):
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    with pytest.raises(ValueError):
+        eg = Example.from_dict(predicted, annots)
+
+
+@pytest.mark.parametrize("annots", [{"words": ["ice", "cream"], "tags": ["NN", "NN"]}])
 def test_Example_from_dict_with_tags(annots):
     vocab = Vocab()
     predicted = Doc(vocab, words=annots["words"])
@@ -37,28 +41,117 @@ def test_Example_from_dict_with_tags(annots):
         assert token.tag_ == annots["tags"][i]
 
 
-"""
+@pytest.mark.xfail(reason="TODO - fix")
+@pytest.mark.parametrize(
+    "annots",
+    [
+        {
+            "words": ["I", "like", "London", "and", "Berlin", "."],
+            "entities": [(7, 13, "LOC"), (18, 24, "LOC")],
+        }
+    ],
+)
 def test_Example_from_dict_with_entities(annots):
-    # TODO
-    pass
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    eg = Example.from_dict(predicted, annots)
+    assert len(list(eg.reference.ents)) == 2
 
+
+@pytest.mark.parametrize(
+    "annots",
+    [
+        {
+            "words": ["I", "like", "London", "and", "Berlin", "."],
+            "deps": ["nsubj", "ROOT", "dobj", "cc", "conj", "punct"],
+            "heads": [1, 1, 1, 2, 2, 1],
+        }
+    ],
+)
 def test_Example_from_dict_with_parse(annots):
-    # TODO
-    pass
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    eg = Example.from_dict(predicted, annots)
+    for i, token in enumerate(eg.reference):
+        assert token.dep_ == annots["deps"][i]
+        assert token.head.i == annots["heads"][i]
 
+
+@pytest.mark.xfail(reason="TODO - fix")
+@pytest.mark.parametrize(
+    "annots",
+    [
+        {
+            "words": ["Sarah", "'s", "sister", "flew"],
+            "morphs": [
+                "NounType=prop|Number=sing",
+                "Poss=yes",
+                "Number=sing",
+                "Tense=past|VerbForm=fin",
+            ],
+        }
+    ],
+)
 def test_Example_from_dict_with_morphology(annots):
-    # TODO
-    pass
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    eg = Example.from_dict(predicted, annots)
+    for i, token in enumerate(eg.reference):
+        assert token.morph_ == annots["morphs"][i]
 
+
+@pytest.mark.parametrize(
+    "annots",
+    [
+        {
+            "words": ["This", "is", "one", "sentence", "this", "is", "another"],
+            "sent_starts": [1, 0, 0, 0, 1, 0, 0],
+        }
+    ],
+)
 def test_Example_from_dict_with_sent_start(annots):
-    # TODO
-    pass
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    eg = Example.from_dict(predicted, annots)
+    assert len(list(eg.reference.sents)) == 2
+    for i, token in enumerate(eg.reference):
+        assert bool(token.is_sent_start) == bool(annots["sent_starts"][i])
 
+
+@pytest.mark.parametrize(
+    "annots",
+    [
+        {
+            "words": ["This", "is", "a", "sentence"],
+            "cats": {"cat1": 1.0, "cat2": 0.0, "cat3": 0.5},
+        }
+    ],
+)
 def test_Example_from_dict_with_cats(annots):
-    # TODO
-    pass
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    eg = Example.from_dict(predicted, annots)
+    assert len(list(eg.reference.cats)) == 3
+    assert eg.reference.cats["cat1"] == 1.0
+    assert eg.reference.cats["cat2"] == 0.0
+    assert eg.reference.cats["cat3"] == 0.5
 
+
+@pytest.mark.xfail(reason="TODO - fix")
+@pytest.mark.parametrize(
+    "annots",
+    [
+        {
+            "words": ["Russ", "Cochran", "made", "reprints"],
+            "links": {(0, 12): {"Q7381115": 1.0, "Q2146908": 0.0}},
+        }
+    ],
+)
 def test_Example_from_dict_with_links(annots):
-    # TODO
-    pass
-"""
+    vocab = Vocab()
+    predicted = Doc(vocab, words=annots["words"])
+    eg = Example.from_dict(predicted, annots)
+    assert eg.reference[0].ent_kb_id_ == "Q7381115"
+    assert eg.reference[1].ent_kb_id_ == "Q7381115"
+    assert eg.reference[2].ent_kb_id_ == ""
+    assert eg.reference[3].ent_kb_id_ == ""