diff --git a/test-schema.json b/test-schema.json
index 670d2804..8393720d 100644
--- a/test-schema.json
+++ b/test-schema.json
@@ -1,59 +1,73 @@
 {
     "$schema": "http://json-schema.org/draft-04/schema#",
+    "description": "Schema for tests",
+    "type": "array",
+    "items": {
+        "type": "object",
+        "required": [ "description", "schema", "tests" ],
+        "properties": {
+            "id": {
+                "description": "Uniquely identifies a set of tests",
+                "type": "string",
+                "format": "uri"
+            },
+            "description": { "type": "string" },
+            "schema": {},
+            "tests": {
+                "description": "A set of related tests all using the same schema",
+                "type": "array",
+                "items": { "$ref": "#/definitions/test" },
+                "minItems": 1
+            }
+        },
+        "additionalProperties": false,
+        "minItems": 1
+    },
     "definitions": {
         "outputItem": {
             "type": "object",
             "properties": {
-                "valid": {"type": "boolean"},
-                "keywordLocation": {"type": "string"},
+                "valid": { "type": "boolean" },
+                "keywordLocation": { "type": "string" },
                 "absoluteKeywordLocation": {
                     "type": "string",
                     "format": "uri"
                 },
-                "instanceLocation": {"type": "string"},
+                "instanceLocation": { "type": "string" },
                 "annotations": {
                     "type": "array",
-                    "items": {"$ref": "#/definitions/outputItem"}
+                    "items": { "$ref": "#/definitions/outputItem" }
                 },
                 "errors": {
                     "type": "array",
-                    "items": {"$ref": "#/definitions/outputItem"}
+                    "items": { "$ref": "#/definitions/outputItem" }
                 }
             }
-        }
-    },
-    "type": "array",
-    "items": {
-        "type": "object",
-        "required": ["description", "schema", "tests"],
-        "properties": {
-            "description": {"type": "string"},
-            "schema": {},
-            "tests": {
-                "type": "array",
-                "items": {
+        },
+        "test": {
+            "description": "A single test",
+            "type": "object",
+            "required": [ "description", "data", "valid" ],
+            "properties": {
+                "id": {
+                    "description": "Uniquely identifies a single test",
+                    "type": "string",
+                    "format": "uri"
+                },
+                "description": { "type": "string" },
+                "data": {},
+                "valid": { "type": "boolean" },
+                "output": {
                     "type": "object",
-                    "required": ["description", "data", "valid"],
+                    "required": [ "basic", "detailed", "verbose" ],
                     "properties": {
-                        "description": {"type": "string"},
-                        "data": {},
-                        "valid": {"type": "boolean"},
-                        "output": {
-                            "type": "object",
-                            "properties": {
-                                "basic": {"$ref": "#/definitions/outputItem"},
-                                "detailed": {"$ref": "#/definitions/outputItem"},
-                                "verbose": {"$ref": "#/definitions/outputItem"}
-                            },
-                            "required": ["basic", "detailed", "verbose"]
-                        }
-                    },
-                    "additionalProperties": false
-                },
-                "minItems": 1
-            }
-        },
-        "additionalProperties": false,
-        "minItems": 1
+                        "basic": { "$ref": "#/definitions/outputItem" },
+                        "detailed": { "$ref": "#/definitions/outputItem" },
+                        "verbose": { "$ref": "#/definitions/outputItem" }
+                    }
+                }
+            },
+            "additionalProperties": false
+        }
     }
 }