diff --git a/CHANGELOG.md b/CHANGELOG.md
index e00aaa3..4560660 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to
 
 ### Added
 
+- Add field-level assertions to deserialization tests ([cbea4fc], [#26])
 - Add 34 edge-case and validation tests covering missing fields, null values,
   empty strings, boundary integers, malformed datetimes/decimals, and nested
   validation ([1ca6e4d], [#33])
@@ -152,6 +153,7 @@ and this project adheres to
 <!-- Commit links -->
 
 [b66a6f5]: https://github.com/LeakIX/l9format-python/commit/b66a6f5
+[cbea4fc]: https://github.com/LeakIX/l9format-python/commit/cbea4fc
 [3547e22]: https://github.com/LeakIX/l9format-python/commit/3547e22
 [1ca6e4d]: https://github.com/LeakIX/l9format-python/commit/1ca6e4d
 [0d8736e]: https://github.com/LeakIX/l9format-python/commit/0d8736e
@@ -218,6 +220,7 @@ and this project adheres to
 [#18]: https://github.com/LeakIX/l9format-python/pull/18
 [#21]: https://github.com/LeakIX/l9format-python/issues/21
 [#22]: https://github.com/LeakIX/l9format-python/issues/22
+[#26]: https://github.com/LeakIX/l9format-python/issues/26
 [#27]: https://github.com/LeakIX/l9format-python/issues/27
 [#33]: https://github.com/LeakIX/l9format-python/issues/33
 [#25]: https://github.com/LeakIX/l9format-python/issues/25
diff --git a/tests/test_l9format.py b/tests/test_l9format.py
index 51e58ed..035f8ca 100644
--- a/tests/test_l9format.py
+++ b/tests/test_l9format.py
@@ -16,14 +16,56 @@ def test_l9event_json_from_reference_repository():
     path = TESTS_DIR / "l9event.json"
     with open(path) as f:
         c = json.load(f)
-    L9Event.from_dict(c)
+    event = L9Event.from_dict(c)
+    assert event.event_type == "leak"
+    assert event.event_source == "DotEnvConfigPlugin"
+    assert event.ip == "127.0.0.1"
+    assert event.port == "8080"
+    assert event.host == "site1.example.com"
+    assert event.reverse == "ptr1.example.com"
+    assert event.protocol == "https"
+    assert event.summary == "GET /... qwerqwer"
+    assert event.http.root == "/site1"
+    assert event.http.url == "/site1/.env"
+    assert event.http.status == 200
+    assert event.http.length == 12423
+    assert event.http.title == "Apache welcome page"
+    assert event.ssl.detected is True
+    assert event.ssl.enabled is True
+    assert event.ssl.version == "TLSv1.3"
+    assert event.ssl.certificate.cn == "example.com"
+    assert event.ssl.certificate.key_algo == "RSA"
+    assert event.ssl.certificate.key_size == 2048
+    assert event.service.software.name == "Apache"
+    assert event.service.software.version == "2.2.4"
+    assert event.service.credentials.noauth is True
+    assert event.leak.stage == "open"
+    assert event.leak.type == "configuration"
+    assert event.leak.severity == "medium"
+    assert event.leak.dataset.rows == 4
+    assert event.leak.dataset.files == 1
+    assert event.network.asn == 0
+    assert event.tags == ["plc"]
+    assert event.transport == ["tcp", "tls", "http"]
+    assert event.event_pipeline == [
+        "ip4scout",
+        "l9tcpid",
+        "l9explore",
+        "DotEnvConfigPlugin",
+    ]
 
 
 def test_l9events_from_ip4scout():
     for path in IP4SCOUT_FILES:
         with open(path) as f:
             c = json.load(f)
-        L9Event.from_dict(c)
+        event = L9Event.from_dict(c)
+        assert event.event_source == "ip4scout"
+        assert event.event_type == "synack"
+        assert isinstance(event.ip, str)
+        assert len(event.ip) > 0
+        assert isinstance(event.port, str)
+        assert len(event.port) > 0
 
 
 def test_iso8601_nanosecond_parsing():