diff --git a/test/data/delta-invalid/meta-missing-value.json b/test/data/delta-invalid/meta-missing-value.json
index 1430b26c5..65d83097e 100644
--- a/test/data/delta-invalid/meta-missing-value.json
+++ b/test/data/delta-invalid/meta-missing-value.json
@@ -1,12 +1,12 @@
 {
-  "context": "bar",
-  "updates": [{
-	"source": {
-	  "label": "schema"
-	},
-	"timestamp": "2013-10-08T15:47:28.263Z",
-	"meta": [{
-	  "path": "a.b.c"
-	}]
-  }]
-}
+  "context": "vessels.urn:mrn:imo:mmsi:234567890",
+  "updates": [
+    {
+      "meta": [
+        {
+          "path": "propulsion.0.revolutions"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/test/data/delta-valid/meta-and-values.json b/test/data/delta-valid/meta-and-values.json
index 4f8ded2d6..608a8d2ab 100644
--- a/test/data/delta-valid/meta-and-values.json
+++ b/test/data/delta-valid/meta-and-values.json
@@ -1,20 +1,29 @@
 {
-  "context": "bar",
-  "updates": [{
-	"source": {
-	  "label": "schema"
-	},
-	"timestamp": "2013-10-08T15:47:28.263Z",
-	"meta": [{
-	  "path": "a.b.c",
-	  "value": {
-	          "description": "...",
-            "units": "m"
+  "context": "vessels.urn:mrn:imo:mmsi:234567890",
+  "updates": [
+    {
+      "source": {
+        "label": "N2000-01",
+        "type": "NMEA2000",
+        "src": "017",
+        "pgn": 127488
+      },
+      "timestamp": "2013-10-08T15:47:28.263Z",
+      "meta": [
+        {
+          "path": "propulsion.0.revolutions",
+          "value": {
+            "description": "Engine revolutions (x60 for RPM)",
+            "units": "Hz"
           }
-        }],
-        "values": [{
-	  "path": "a.b.c",
-	  "value": 1234
-	}]
-  }]
-}
+        }
+      ],
+      "values": [
+        {
+          "path": "propulsion.0.revolutions",
+          "value": 11
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/test/data/delta-valid/meta-delta.json b/test/data/delta-valid/meta-delta.json
index ad80a379c..3e41a653b 100644
--- a/test/data/delta-valid/meta-delta.json
+++ b/test/data/delta-valid/meta-delta.json
@@ -1,16 +1,25 @@
 {
-  "context": "bar",
-  "updates": [{
-	"source": {
-	  "label": "schema"
-	},
-	"timestamp": "2013-10-08T15:47:28.263Z",
-	"meta": [{
-	  "path": "a.b.c",
-	  "value": {
-	          "description": "...",
-            "units": "m"
+  "context": "vessels.urn:mrn:imo:mmsi:234567890",
+  "updates": [
+    {
+      "meta": [
+        {
+          "path": "environment.depth.belowTransducer",
+          "value": {
+            "description": "Depth below Transducer",
+            "units": "m",
+            "timeout": 2.5,
+            "zones": [
+              {
+                "upper": 5.0,
+                "state": "warn",
+                "message": "Shallow water" 
+              }
+            ],
+            "warnMethod": ["sound"]
           }
-	}]
-  }]
-}
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file