diff --git a/schemas/testcaserunfinished.json b/schemas/testcaserunfinished.json
index 00303aa..49350ca 100644
--- a/schemas/testcaserunfinished.json
+++ b/schemas/testcaserunfinished.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -49,7 +50,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
diff --git a/schemas/testcaserunqueued.json b/schemas/testcaserunqueued.json
index 06d15c2..d78b7d7 100644
--- a/schemas/testcaserunqueued.json
+++ b/schemas/testcaserunqueued.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -57,7 +58,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
diff --git a/schemas/testcaserunskipped.json b/schemas/testcaserunskipped.json
index 2a09673..9a0ee08 100644
--- a/schemas/testcaserunskipped.json
+++ b/schemas/testcaserunskipped.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -57,7 +58,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
diff --git a/schemas/testcaserunstarted.json b/schemas/testcaserunstarted.json
index 72f4c7f..43191d0 100644
--- a/schemas/testcaserunstarted.json
+++ b/schemas/testcaserunstarted.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -57,7 +58,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
diff --git a/schemas/testoutputpublished.json b/schemas/testoutputpublished.json
index c29b20a..064ba62 100644
--- a/schemas/testoutputpublished.json
+++ b/schemas/testoutputpublished.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -57,7 +58,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
@@ -87,7 +90,9 @@
                   "minLength": 1
                 },
                 "source": {
-                  "type": "string"
+                  "type": "string",
+                  "minLength": 1,
+                  "format": "uri-reference"
                 }
               },
               "additionalProperties": false,
diff --git a/schemas/testsuiterunfinished.json b/schemas/testsuiterunfinished.json
index 3725cad..3e528d2 100644
--- a/schemas/testsuiterunfinished.json
+++ b/schemas/testsuiterunfinished.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -49,7 +50,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
diff --git a/schemas/testsuiterunqueued.json b/schemas/testsuiterunqueued.json
index d894d29..edffd6c 100644
--- a/schemas/testsuiterunqueued.json
+++ b/schemas/testsuiterunqueued.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -57,7 +58,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {
diff --git a/schemas/testsuiterunstarted.json b/schemas/testsuiterunstarted.json
index 5154c47..cc98433 100644
--- a/schemas/testsuiterunstarted.json
+++ b/schemas/testsuiterunstarted.json
@@ -14,7 +14,8 @@
         },
         "source": {
           "type": "string",
-          "minLength": 1
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "type": {
           "type": "string",
@@ -57,7 +58,9 @@
           "minLength": 1
         },
         "source": {
-          "type": "string"
+          "type": "string",
+          "minLength": 1,
+          "format": "uri-reference"
         },
         "content": {
           "properties": {