diff --git a/src/api/bookmark.rs b/src/api/bookmark.rs
index 89c1d18..d13d2ed 100644
--- a/src/api/bookmark.rs
+++ b/src/api/bookmark.rs
@@ -376,7 +376,7 @@ mod test {
                 before = _,
                 limit = _
             )),
-            results.len() == 0,
+            results.is_empty(),
             "Expected 0 bookmark, got {}",
             results.len()
         );
@@ -468,7 +468,7 @@ mod test {
         assert_eq!(response.status(), Status::Ok);
 
         assert_get_bookmark!(
-            results.len() == 0,
+            results.is_empty(),
             "Expected 0 bookmarks, got {}",
             results.len()
         );
diff --git a/src/api/folder.rs b/src/api/folder.rs
index e72fa0e..784d503 100644
--- a/src/api/folder.rs
+++ b/src/api/folder.rs
@@ -215,7 +215,7 @@ pub(crate) mod test {
         let res = client.get(uri!(super::list_folders(cwd = _))).dispatch();
         assert_eq!(res.status(), Status::Ok);
         let folders: Vec<Folder> = res.into_json().unwrap();
-        assert!(folders.len() > 0);
+        assert!(folders.is_empty());
         assert!(folders.iter().any(|f| f.path == parent_path));
         assert!(folders.iter().all(|f| f.path != path));
 
diff --git a/src/db/bookmark.rs b/src/db/bookmark.rs
index 0668114..34adc29 100644
--- a/src/db/bookmark.rs
+++ b/src/db/bookmark.rs
@@ -139,7 +139,7 @@ pub(crate) mod test {
             .await
             .expect("Error loading bookmarks");
 
-        assert!(results.len() > 0);
+        assert!(!results.is_empty());
         info!("{:?}", results[0]);
     }
 
diff --git a/src/db/tag.rs b/src/db/tag.rs
index a713214..2215704 100644
--- a/src/db/tag.rs
+++ b/src/db/tag.rs
@@ -207,7 +207,7 @@ pub mod tests {
         assert_eq!(bookmark.id, new.id);
         assert!(tags.is_empty());
 
-        let tag_names = vec![rand_str(4), rand_str(4)]
+        let tag_names = [rand_str(4), rand_str(4)]
             .iter()
             .sorted()
             .map(|i| i.to_string())
@@ -222,10 +222,7 @@ pub mod tests {
         assert_eq!(bookmark.id, new.id);
         assert_eq!(tags.len(), 2);
         assert_eq!(
-            tags.into_iter()
-                .map(|t| t.name.clone())
-                .sorted()
-                .collect_vec(),
+            tags.iter().map(|t| t.name.clone()).sorted().collect_vec(),
             tag_names
         );
     }
diff --git a/src/utils/search.rs b/src/utils/search.rs
index bafe0e9..348d9de 100644
--- a/src/utils/search.rs
+++ b/src/utils/search.rs
@@ -175,7 +175,7 @@ mod test {
 
     fn parse_query<'a>(raw: &'a str, out_arena: &'a Arena, err_arena: &'a Arena) -> Query<'a> {
         let source = Source::new(raw);
-        let rv = parse::<Query>(source, &out_arena, &err_arena);
+        let rv = parse::<Query>(source, out_arena, err_arena);
         debug!(?rv, ?source, "parsed");
         assert!(rv.is_ok());
         rv.unwrap()
@@ -186,7 +186,7 @@ mod test {
         let out_arena = Arena::new();
         let err_arena = Arena::new();
 
-        for src in vec![
+        for src in [
             r#"/cs/pl/rust title #rust"#,
             r#"/cs/pl title #rust"#,
             r#"/cs title #rust"#,
@@ -196,7 +196,7 @@ mod test {
             r#"title ( #rust | #langs )"#,
             r#"/blog/"#,
         ] {
-            let rv = parse_query(&src, &out_arena, &err_arena);
+            let rv = parse_query(src, &out_arena, &err_arena);
             info!(?rv, ?src, "parsed");
         }
     }