diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index de78330c..cc6ac600 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -13,7 +13,7 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: ${{ github.ref }}-validation
+  group: pr-${{ github.event.pull_request.number }}
   cancel-in-progress: true
 
 jobs:
diff --git a/domains/lovely.localplayer.dev.json b/domains/lovely.localplayer.dev.json
new file mode 100644
index 00000000..5bf314b0
--- /dev/null
+++ b/domains/lovely.localplayer.dev.json
@@ -0,0 +1,16 @@
+{
+    "description": "gateway for site",
+    "domain": "localplayer.dev",
+    "subdomain": "lovely",
+
+    "owner": {
+        "repo": "https://github.com/Gj4meZ/rsr",
+        "email": "chilliatogj4mez@gmail.com"
+    },
+
+    "record": {
+        "A": ["87.106.232.208"]
+    },
+
+    "proxied": true
+}
diff --git a/tests/json.test.js b/tests/json.test.js
index 5e5c50ea..aca87b76 100644
--- a/tests/json.test.js
+++ b/tests/json.test.js
@@ -80,6 +80,30 @@ t("All files should have the required fields", (t) => {
     });
 });
 
+t("All filenames, subdomains, and domains must be lowercase", (t) => {
+    const files = fs.readdirSync(domainsPath).filter(file => {
+        const filePath = path.join(domainsPath, file);
+        return file.endsWith(".json") && fs.lstatSync(filePath).isFile();
+    });
+
+    files.forEach(file => {
+        const filePath = path.join(domainsPath, file);
+        const data = fs.readJsonSync(filePath);
+
+        // Check filename is lowercase
+        t.is(file, file.toLowerCase(), `${file}: Filename must be lowercase`);
+
+        const { subdomain, domain } = data;
+
+        // Check JSON values are lowercase
+        t.truthy(subdomain, `${file}: Missing subdomain field`);
+        t.truthy(domain, `${file}: Missing domain field`);
+
+        t.is(subdomain, subdomain.toLowerCase(), `${file}: Subdomain must be lowercase`);
+        t.is(domain, domain.toLowerCase(), `${file}: Domain must be lowercase`);
+    });
+});
+
 t("All files should have valid optional owner fields", (t) => {
     const files = fs.readdirSync(domainsPath).filter(file => {
     const filePath = path.join(domainsPath, file);