2 files changed, 3 insertions, 4 deletions

diff --git a/crates/tools/src/lib.rs b/crates/tools/src/lib.rs
index 444745be5..7c5410d3c 100644
--- a/crates/tools/src/lib.rs
+++ b/crates/tools/src/lib.rs
@@ -50,7 +50,7 @@ pub fn collect_tests(s: &str) -> Vec<(usize, Test)> {
             block.map(|(_, line)| line).chain(::std::iter::once("")),
             "\n",
         );
-        assert!(!text.trim().is_empty() && text.ends_with("\n"));
+        assert!(!text.trim().is_empty() && text.ends_with('\n'));
         res.push((start_line, Test { name, text }))
     }
     res
diff --git a/crates/tools/src/main.rs b/crates/tools/src/main.rs
index 152298014..fdb443690 100644
--- a/crates/tools/src/main.rs
+++ b/crates/tools/src/main.rs
@@ -112,9 +112,8 @@ fn existing_tests(dir: &Path) -> Result<HashMap<String, (PathBuf, Test)>> {
             name: name.clone(),
             text,
         };
-        match res.insert(name, (path, test)) {
-            Some(old) => println!("Duplicate test: {:?}", old),
-            None => (),
+        if let Some(old) = res.insert(name, (path, test)) {
+            println!("Duplicate test: {:?}", old);
         }
     }
     Ok(res)