diff --git a/src/atomicmin.rs b/src/atomicmin.rs
index af2287a9..73c3d997 100644
--- a/src/atomicmin.rs
+++ b/src/atomicmin.rs
@@ -9,13 +9,13 @@ pub struct AtomicMin {
 impl AtomicMin {
     pub fn new(init: Option<usize>) -> Self {
         Self {
-            val: AtomicUsize::new(init.unwrap_or(usize::max_value())),
+            val: AtomicUsize::new(init.unwrap_or(usize::MAX)),
         }
     }
 
     pub fn get(&self) -> Option<usize> {
         let val = self.val.load(SeqCst);
-        if val == usize::max_value() {
+        if val == usize::MAX {
             None
         } else {
             Some(val)
diff --git a/src/png/mod.rs b/src/png/mod.rs
index 4df7169b..44bfded4 100644
--- a/src/png/mod.rs
+++ b/src/png/mod.rs
@@ -337,7 +337,7 @@ impl PngImage {
                     // http://www.libpng.org/pub/png/book/chapter09.html
                     let mut best_filter = 0;
                     let mut best_line = Vec::new();
-                    let mut best_size = std::u64::MAX;
+                    let mut best_size = u64::MAX;
 
                     // Avoid vertical filtering on first line of each interlacing pass
                     for filter in if last_pass == line.pass { 0..5 } else { 0..2 } {
diff --git a/tests/filters.rs b/tests/filters.rs
index 2f482e9b..4da00a8c 100644
--- a/tests/filters.rs
+++ b/tests/filters.rs
@@ -57,7 +57,7 @@ fn test_it_converts(
     if let Some(palette) = png.raw.palette.as_ref() {
         assert!(palette.len() <= 1 << (png.raw.ihdr.bit_depth.as_u8() as usize));
     } else {
-        assert!(png.raw.ihdr.color_type != ColorType::Indexed);
+        assert_ne!(png.raw.ihdr.color_type, ColorType::Indexed);
     }
 
     remove_file(output).ok();
diff --git a/tests/regression.rs b/tests/regression.rs
index 17a60f25..f4524c3a 100644
--- a/tests/regression.rs
+++ b/tests/regression.rs
@@ -64,7 +64,7 @@ fn test_it_converts(
     if let Some(palette) = png.raw.palette.as_ref() {
         assert!(palette.len() <= 1 << (png.raw.ihdr.bit_depth.as_u8() as usize));
     } else {
-        assert!(png.raw.ihdr.color_type != ColorType::Indexed);
+        assert_ne!(png.raw.ihdr.color_type, ColorType::Indexed);
     }
 
     remove_file(output).ok();