diff --git a/event-protocol/examples/events.ndjson b/event-protocol/examples/events.ndjson
index e5d3a332f9..f8fc3c6d3a 100644
--- a/event-protocol/examples/events.ndjson
+++ b/event-protocol/examples/events.ndjson
@@ -3,7 +3,7 @@
 {"pickle":{"language":"en","locations":[{"column":3,"line":2}],"name":"World","steps":[{"arguments":[],"locations":[{"column":11,"line":3}],"text":"a step"}],"tags":[]},"type":"pickle","uri":"features/hello.feature"}
 {"type":"attachment","source":{"uri":"features/hello.feature","start":{"line":3,"column":7}},"data":"iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAABGdBTUEAALGPC/xhBQAAAAFzUkdCAK7OHOkAAAELUExURUdwTACoGAClFACqHACoFwCnGQCnFQCnGACoGQCoGQCoGACuGgCnFwCiFwCoGACoGACnFwClFgCpGACoFwD/AACnGAC2JACoGACnFwCqKgCoGACoGACqGQCoFwCnFwCoFwB/AACnGACoGAC/AACoGACoFgCmFwCnFwCnFwCqFgCmFgCZAACoGC64Ql3IbA2sJBuxMBiwLhewLR2yMgmrIOn36/z+/BGuJ9/04rHkuIDUjGHJcA6tJeD04wGoGQusIpnco+T257PlugSpHN704XDOfQeqHiCzNc7u0+z57t3z4HvSh7fmvj69UJzdpSi2PNjy3AKpGlrHahqxMBCtJpHZm83u0jS6R0vCXEWczDEAAAAsdFJOUwDIJQlYPSP7cFCqE1cW+mf4ImiBAXQHPu8GfP0zzoyOAp2wBOg4a2PqOU4FxgPjdgAAAK9JREFUGNNNj1UCwkAMRBcotLi7uw1S3N3d4f4nYSvIfO28bCYJIaI0OSabJ1+pFaDKpD4+zUJS1CHVWSwer+esDNhEQP+fV/f5uAd4XEIesNldl5WK0KSlQAtcDkc5xUcBA+y3tL/UKQIhCpLA+sTzw1K7UQVHQTyB23QyKraaNSAgTOGAQb9bqBeAoDg2EpMT4XdLm3rD8qrO7zFWO7UW8+86oodJp/zzRGUwyq83Mjcb8VXl0ZMAAAAASUVORK5CYII=","media":{"encoding":"base64","type":"image/png"}}
 {"type":"attachment","source":{"uri":"features/hello.feature","start":{"line":3,"column":7}},"data":"Exception in thread \"main\" java.lang.NullPointerException\n        at com.example.myproject.Book.getTitle(Book.java:16)\n        at com.example.myproject.Author.getBookTitles(Author.java:25)\n        at com.example.myproject.Bootstrap.main(Bootstrap.java:14)\n","media":{"encoding":"utf-8","type":"text/vnd.cucumber.stacktrace.java+plain"}}
-{"type":"test-run-started","workingDirectory":"/Users/matt/projects/cucumber-ruby","timestamp":1489683458}
+{"type":"test-run-started","workingDirectory":"/Users/matt/projects/cucumber-ruby","timestamp":1489683458,"vcs":{"git":{"head":"be6683b9004a5785ca9b51776b98694dfe406fb6","diff":"diff --git a/event-protocol/schemas/test-run-started.json b/event-protocol/schemas/test-run-started.json\nindex 6fa0e39..48efe9a 100644\n--- a/event-protocol/schemas/test-run-started.json\n+++ b/event-protocol/schemas/test-run-started.json\n@@ -12,7 +12,27 @@\n     },\n     \"timestamp\": {\n       \"type\": \"number\"\n+    },\n+    \"vcs\": {\n+      \"type\": \"object\",\n+      \"properties\": {\n+        \"git\": {\n+          \"type\": \"object\",\n+          \"properties\": {\n+            \"head\": {\n+              \"type\": \"string\"\n+            },\n+            \"diff\": {\n+              \"type\": \"string\"\n+            }\n+          }\n+        }\n+      }\n     }\n   },\n+  \"required\": [\n+    \"type\",\n+    \"timestamp\"\n+  ],\n   \"additionalProperties\": false\n }\""}}}
 {"type":"test-case-prepared","sourceLocation":{"uri":"features/passing.feature","line":2},"steps":[{"actionLocation":{"uri":"/Users/matt/projects/cucumber-ruby/lib/cucumber/filters/prepare_world.rb","line":28},"sourceLocation":{"uri":"/Users/matt/projects/cucumber-ruby/lib/cucumber/filters/prepare_world.rb","line":28}},{"actionLocation":{"uri":"features/passing.feature","line":3},"sourceLocation":{"uri":"features/passing.feature","line":3}}]}
 {"type":"test-case-started","sourceLocation":{"uri":"features/passing.feature","line":2}}
 {"type":"test-step-started","testCase":{"sourceLocation":{"uri":"features/passing.feature","line":2}},"index":0}
diff --git a/event-protocol/examples/events/005_test-run-started.json b/event-protocol/examples/events/005_test-run-started.json
index ea0bcfec01..e1b5681a99 100644
--- a/event-protocol/examples/events/005_test-run-started.json
+++ b/event-protocol/examples/events/005_test-run-started.json
@@ -1,5 +1,11 @@
 {
   "type":"test-run-started",
   "workingDirectory":"/Users/matt/projects/cucumber-ruby",
-  "timestamp":1489683458
+  "timestamp":1489683458,
+  "vcs": {
+    "git": {
+      "head": "be6683b9004a5785ca9b51776b98694dfe406fb6",
+      "diff": "diff --git a/event-protocol/schemas/test-run-started.json b/event-protocol/schemas/test-run-started.json\nindex 6fa0e39..48efe9a 100644\n--- a/event-protocol/schemas/test-run-started.json\n+++ b/event-protocol/schemas/test-run-started.json\n@@ -12,7 +12,27 @@\n     },\n     \"timestamp\": {\n       \"type\": \"number\"\n+    },\n+    \"vcs\": {\n+      \"type\": \"object\",\n+      \"properties\": {\n+        \"git\": {\n+          \"type\": \"object\",\n+          \"properties\": {\n+            \"head\": {\n+              \"type\": \"string\"\n+            },\n+            \"diff\": {\n+              \"type\": \"string\"\n+            }\n+          }\n+        }\n+      }\n     }\n   },\n+  \"required\": [\n+    \"type\",\n+    \"timestamp\"\n+  ],\n   \"additionalProperties\": false\n }\""
+    }
+  }
 }
diff --git a/event-protocol/schemas/test-run-started.json b/event-protocol/schemas/test-run-started.json
index 6fa0e391ee..48efe9a82a 100644
--- a/event-protocol/schemas/test-run-started.json
+++ b/event-protocol/schemas/test-run-started.json
@@ -12,7 +12,27 @@
     },
     "timestamp": {
       "type": "number"
+    },
+    "vcs": {
+      "type": "object",
+      "properties": {
+        "git": {
+          "type": "object",
+          "properties": {
+            "head": {
+              "type": "string"
+            },
+            "diff": {
+              "type": "string"
+            }
+          }
+        }
+      }
     }
   },
+  "required": [
+    "type",
+    "timestamp"
+  ],
   "additionalProperties": false
 }