diff --git a/crates/uv-auth/src/credentials.rs b/crates/uv-auth/src/credentials.rs
index 7e86715e8cc6..46489be06f8f 100644
--- a/crates/uv-auth/src/credentials.rs
+++ b/crates/uv-auth/src/credentials.rs
@@ -17,7 +17,7 @@ pub struct Credentials {
     password: Option<String>,
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Ord, PartialOrd, Hash)]
+#[derive(Clone, Debug, PartialEq, Eq, Ord, PartialOrd, Hash, Default)]
 pub(crate) struct Username(Option<String>);
 
 impl Username {
diff --git a/crates/uv-auth/src/middleware.rs b/crates/uv-auth/src/middleware.rs
index 9693b83b8d7c..ec5ce73b07ac 100644
--- a/crates/uv-auth/src/middleware.rs
+++ b/crates/uv-auth/src/middleware.rs
@@ -160,6 +160,13 @@ impl Middleware for AuthMiddleware {
                 request = credentials.authenticate(request);
                 // Do not insert already-cached credentials
                 None
+            } else if let Some(credentials) = self
+                .cache()
+                .get_url(request.url(), &credentials.to_username())
+            {
+                request = credentials.authenticate(request);
+                // Do not insert already-cached credentials
+                None
             } else if let Some(credentials) = self
                 .fetch_credentials(Some(&credentials), request.url())
                 .await