diff --git a/AGENTS.md b/AGENTS.md
index 3c57070..d33f464 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -28,6 +28,12 @@ Keep the public command surface stable. Docs and examples call `amendable`, not
 
 ## Tests
 
+Do not add tautological tests that only assert a default host, constant, or
+constructor dump equals the literal you just set. If changing an intended
+default requires updating the test, and the test never exercises behavior,
+omit it. Test env/file override, staging vs production selection, and CLI
+contracts instead.
+
 ```bash
 cargo test
 cargo fmt --check
diff --git a/src/config.rs b/src/config.rs
index 779f785..12bd6d8 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -167,9 +167,10 @@ mod tests {
         env::remove_var("AMENDABLE_TOKEN");
         env::remove_var("AMENDABLE_USERNAME");
         let cfg = Config::load().unwrap();
+        assert_ne!(cfg.api_url, STAGING_API_URL);
+        assert_ne!(cfg.app_url, STAGING_APP_URL);
         assert_eq!(cfg.api_url, DEFAULT_API_URL);
         assert_eq!(cfg.app_url, DEFAULT_APP_URL);
-        assert_eq!(cfg.api_url, "https://api.amendable.io");
     }
 
     #[test]