diff --git a/tests/domains.test.js b/tests/domains.test.js
index 6ffeddf447..d0a778bbc4 100644
--- a/tests/domains.test.js
+++ b/tests/domains.test.js
@@ -102,15 +102,3 @@ t("Users are limited to one single character subdomain", (t) => {
 
     t.pass();
 });
-
-t("Subdomain names should not contain 'is-a-dev'", (t) => {
-    files.forEach((file) => {
-        const subdomain = file.replace(/\.json$/, "");
-        const baseName = subdomain.split(".").pop();
-
-        t.false(
-            baseName.toLowerCase().includes("is-a-dev"),
-            `${file}: Subdomain name cannot contain 'is-a-dev'`
-        );
-    });
-});
diff --git a/tests/json.test.js b/tests/json.test.js
index e3d79e801e..b59fd342a8 100644
--- a/tests/json.test.js
+++ b/tests/json.test.js
@@ -116,6 +116,7 @@ async function validateFileName(t, file) {
 
     const rootSubdomain = subdomain.split(".").pop();
     t.false(rootSubdomain.startsWith("_"), `${file}: Root subdomains should not start with an underscore`);
+    t.false(rootSubdomain.includes("is-a-dev"), `${file}: Root subdomains should not contain is-a-dev`);
 }
 
 async function processFile(file, t) {