diff --git a/tests/test_delta_class.py b/tests/test_delta_class.py
index 14bea98..90e3828 100644
--- a/tests/test_delta_class.py
+++ b/tests/test_delta_class.py
@@ -323,6 +323,5 @@ def test_noop(session):
 
 
 def test_parse_delta_unknown(session):
-    assert UnknownEvent(source="Delta class", data={"abc": 10}) == parse_delta(
-        session, {"abc": 10}
-    )
+    data = {"class": "Abc"}
+    assert UnknownEvent(source="Delta class", data=data) == parse_delta(session, data)
diff --git a/tests/test_delta_type.py b/tests/test_delta_type.py
index 38b4dc8..ac44ad2 100644
--- a/tests/test_delta_type.py
+++ b/tests/test_delta_type.py
@@ -951,6 +951,5 @@ def test_plan_participation(session):
 
 
 def test_parse_delta_unknown(session):
-    assert UnknownEvent(source="Delta type", data={"abc": 10}) == parse_delta(
-        session, {"abc": 10}
-    )
+    data = {"class": "AdminTextMessage", "type": "abc"}
+    assert UnknownEvent(source="Delta type", data=data) == parse_delta(session, data)