diff --git a/internal/logparser/_golden/genericjson_zap_02.json b/internal/logparser/_golden/genericjson_zap_02.json
new file mode 100644
index 00000000..08618ea6
--- /dev/null
+++ b/internal/logparser/_golden/genericjson_zap_02.json
@@ -0,0 +1,11 @@
+{
+  "severity": {
+    "str": "Info",
+    "number": 9,
+    "text": "info"
+  },
+  "body": "BadTimestamp",
+  "attrs": {
+    "ts": "\""
+  }
+}
\ No newline at end of file
diff --git a/internal/logparser/_golden/genericjson_zap_03.json b/internal/logparser/_golden/genericjson_zap_03.json
new file mode 100644
index 00000000..8dfb8092
--- /dev/null
+++ b/internal/logparser/_golden/genericjson_zap_03.json
@@ -0,0 +1,11 @@
+{
+  "severity": {
+    "str": "Info",
+    "number": 9,
+    "text": "info"
+  },
+  "body": "BadTimestamp",
+  "attrs": {
+    "ts": "-"
+  }
+}
\ No newline at end of file
diff --git a/internal/logparser/_testdata/genericjson/zap.jsonl b/internal/logparser/_testdata/genericjson/zap.jsonl
index caccf76c..a5f92572 100644
--- a/internal/logparser/_testdata/genericjson/zap.jsonl
+++ b/internal/logparser/_testdata/genericjson/zap.jsonl
@@ -1 +1,3 @@
-{"level":"info","ts":1701681119.1613183,"logger":"poll","caller":"gh-archived/main.go:197","msg":"Events","duration":0.437301455,"integers":[1, 2, 3],"new_count":100,"remaining":1040,"used":3960,"reset":660.838704106,"reset_human":"in 12 minutes","sleep":0.198120375,"target_rate":0.63542183}
\ No newline at end of file
+{"level":"info","ts":1701681119.1613183,"logger":"poll","caller":"gh-archived/main.go:197","msg":"Events","duration":0.437301455,"integers":[1, 2, 3],"new_count":100,"remaining":1040,"used":3960,"reset":660.838704106,"reset_human":"in 12 minutes","sleep":0.198120375,"target_rate":0.63542183}
+{"level":"info","ts":"\"","msg":"BadTimestamp"}
+{"level":"info","ts":"-","msg":"BadTimestamp"}