diff --git a/src/options/vars.rs b/src/options/vars.rs
index cbbe047d8..0f46631da 100644
--- a/src/options/vars.rs
+++ b/src/options/vars.rs
@@ -148,6 +148,5 @@ impl MockVars {
             "NO_COLOR" => self.no_colors = value.clone(),
             _ => (),
         };
-        ()
     }
 }
diff --git a/src/output/render/groups.rs b/src/output/render/groups.rs
index 1c4a78514..08b1993bf 100644
--- a/src/output/render/groups.rs
+++ b/src/output/render/groups.rs
@@ -180,7 +180,7 @@ pub mod test {
                 GroupFormat::Regular,
                 file_user
             )
-        )
+        );
     }
 
     #[test]
@@ -203,7 +203,7 @@ pub mod test {
                 GroupFormat::Regular,
                 file_user
             )
-        )
+        );
     }
 
     #[test]
diff --git a/src/output/time.rs b/src/output/time.rs
index 484504d4c..193ade695 100644
--- a/src/output/time.rs
+++ b/src/output/time.rs
@@ -158,7 +158,7 @@ mod test {
         let max_month_width = 4;
         let month = "1\u{2F49}"; // 1月
         let padding = short_month_padding(max_month_width, month);
-        let final_str = format!("{:<width$}", month, width = padding);
+        let final_str = format!("{month:<padding$}");
         assert_eq!(max_month_width, UnicodeWidthStr::width(final_str.as_str()));
     }