diff --git a/src/flamegraph/color/mod.rs b/src/flamegraph/color/mod.rs
index 1cf1fe8f..b2b7f209 100644
--- a/src/flamegraph/color/mod.rs
+++ b/src/flamegraph/color/mod.rs
@@ -203,7 +203,7 @@ impl FromStr for StrokeColor {
             return Ok(StrokeColor::None);
         }
         parse_flat_bgcolor(s)
-            .map(|c| StrokeColor::Color(c))
+            .map(StrokeColor::Color)
             .ok_or_else(|| format!("unknown color: {}", s))
     }
 }
diff --git a/tests/common/collapse.rs b/tests/common/collapse.rs
index 1a1c1689..f272b3be 100644
--- a/tests/common/collapse.rs
+++ b/tests/common/collapse.rs
@@ -15,7 +15,7 @@ where
     let mut line_num = 1;
     for line in result.lines() {
         let line = if strip_quotes {
-            line.unwrap().replace("\"", "").replace("'", "")
+            line.unwrap().replace('\"', "").replace('\'', "")
         } else {
             line.unwrap()
         };