diff --git a/labelDefiner.ts b/labelDefiner.ts
index c3e86c0..78bb1f3 100644
--- a/labelDefiner.ts
+++ b/labelDefiner.ts
@@ -39,7 +39,10 @@ const ignoredPDSHostnamePatterns: RegExp[] = [
     /^.+\.ngrok-free\.dev$/,
     /^.+\.ngrok-free\.pizza$/,
     // Similarly, who uses Railway with the default domain to host a PDS?
-    /^.+\.railway\.app$/
+    /^.+\.railway\.app$/,
+    // Our users are probably not interested in labels for test infrastructure
+    /^dev\.certified\.app$/,
+    /^.+\.test\.certified\.app$/
 ];
 
 const ignoredHandlePatterns: RegExp[] = [