diff --git a/keystore2/src/legacy_blob.rs b/keystore2/src/legacy_blob.rs
index c27a050..e05e686 100644
--- a/keystore2/src/legacy_blob.rs
+++ b/keystore2/src/legacy_blob.rs
@@ -961,7 +961,7 @@
 
     fn make_user_path_name(&self, user_id: u32) -> PathBuf {
         let mut path = self.path.clone();
-        path.push(&format!("user_{}", user_id));
+        path.push(format!("user_{}", user_id));
         path
     }
 
diff --git a/keystore2/test_utils/run_as.rs b/keystore2/test_utils/run_as.rs
index d39d069..2cd9fec 100644
--- a/keystore2/test_utils/run_as.rs
+++ b/keystore2/test_utils/run_as.rs
@@ -357,9 +357,12 @@
         // Safety: run_as must be called from a single threaded process.
         // This device test is run as a separate single threaded process.
         unsafe {
-            run_as(selinux::getcon().unwrap().to_str().unwrap(), getuid(), getgid(), || {
-                panic!("Closure must panic.")
-            })
+            run_as::<_, ()>(
+                selinux::getcon().unwrap().to_str().unwrap(),
+                getuid(),
+                getgid(),
+                || panic!("Closure must panic."),
+            )
         };
     }