diff --git a/tests/secrets-api-error-handling.t b/tests/secrets-api-error-handling.t
index 1b60aef..e15735d 100644
--- a/tests/secrets-api-error-handling.t
+++ b/tests/secrets-api-error-handling.t
@@ -50,6 +50,7 @@ BEGIN {
     }
 }
 
+no warnings 'once';
 *Mojo::UserAgent::new = \&MockMojoUserAgent::new;
 
 subtest 'API error handling' => sub {