diff --git a/tests/fixtures/jsonschemas/v1-schema.json b/tests/fixtures/json-schemas/v1.json
similarity index 96%
rename from tests/fixtures/jsonschemas/v1-schema.json
rename to tests/fixtures/json-schemas/v1.json
index a74b7ec..a33bbc8 100644
--- a/tests/fixtures/jsonschemas/v1-schema.json
+++ b/tests/fixtures/json-schemas/v1.json
@@ -19,7 +19,7 @@
             "pattern": "^PlaybookNode$"
           },
           "id": {
-            "format": "^playbook_.+$",
+            "pattern": "^playbook_.+$",
             "type": "string"
           },
           "name": {
@@ -43,7 +43,7 @@
               "type": "object",
               "properties": {
                 "type": {
-                  "format": "^PlayNode$",
+                  "pattern": "^PlayNode$",
                   "type": "string"
                 },
                 "id": {
@@ -173,6 +173,7 @@
           }
         },
         "include_role": {
+          "description": "Flag indicating if this role is an include role or not.",
           "type": "boolean"
         }
       },
diff --git a/tests/requirements_tests.txt b/tests/requirements_tests.txt
index 262f25c..554fbc7 100644
--- a/tests/requirements_tests.txt
+++ b/tests/requirements_tests.txt
@@ -3,4 +3,5 @@ pytest==8.3.2
 pytest-cov==5.0.0
 pyquery==2.0.1
 black~=24.8
-jq==1.8.0
\ No newline at end of file
+jq==1.8.0
+jsonschema[format]==4.23.0
\ No newline at end of file
diff --git a/tests/test_json_renderer.py b/tests/test_json_renderer.py
index a22a181..e0136e4 100644
--- a/tests/test_json_renderer.py
+++ b/tests/test_json_renderer.py
@@ -4,6 +4,8 @@
 
 import jq
 import pytest
+from jsonschema import validate
+from jsonschema.validators import Draft202012Validator
 
 from ansibleplaybookgrapher import __prog__
 from ansibleplaybookgrapher.cli import PlaybookGrapherCLI
@@ -68,6 +70,17 @@ def _common_tests(
     with open(json_path, "r") as f:
         output = json.load(f)
 
+    with open(os.path.join(FIXTURES_DIR, "json-schemas/v1.json")) as schema_file:
+        schema = json.load(schema_file)
+
+    # If no exception is raised by validate(), the instance is valid.
+    # I currently don't use format but added it here to not forget to add in case I use in the future.
+    validate(
+        instance=output,
+        schema=schema,
+        format_checker=Draft202012Validator.FORMAT_CHECKER,
+    )
+
     playbooks = jq.compile(".playbooks[]").input(output).all()
 
     plays = jq.compile(".playbooks[].plays").input(output).first()