diff --git a/tests/fixtures/schema.json b/tests/fixtures/schema.json
new file mode 100644
index 0000000..e6e5e35
--- /dev/null
+++ b/tests/fixtures/schema.json
@@ -0,0 +1,37 @@
+{
+  "variables": {
+    "PORT": {
+      "type": "port",
+      "required": true,
+      "desc": "Port number for the server"
+    },
+    "NODE_ENV": {
+      "type": "enum",
+      "required": true,
+      "choices": ["development", "production", "test"],
+      "desc": "Environment mode"
+    },
+    "DATABASE_URL": {
+      "type": "url",
+      "required": true,
+      "desc": "Database connection URL"
+    },
+    "DEBUG": {
+      "type": "boolean",
+      "required": false,
+      "default": false,
+      "desc": "Enable debug mode"
+    },
+    "API_KEY": {
+      "type": "string",
+      "required": true,
+      "desc": "API authentication key"
+    },
+    "MAX_RETRIES": {
+      "type": "int",
+      "required": false,
+      "default": 3,
+      "desc": "Maximum number of retries"
+    }
+  }
+}