diff --git a/src/lib.rs b/src/lib.rs
index 13b20c7..3247810 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -111,7 +111,7 @@ mod tests {
 
     #[test]
     fn number() {
-        let result = format!("a: {}", 32523532u64);
+        let result = format!("a: {}", 32_523_532_u64);
         assert_eq!(result, "a: 32523532");
     }
 
diff --git a/tests/base.rs b/tests/base.rs
index 33c7c22..08ad8da 100644
--- a/tests/base.rs
+++ b/tests/base.rs
@@ -45,7 +45,7 @@ fn dont_move() {
 #[test]
 fn ptr_correct_addr() {
     static STATIC: u8 = 0;
-    let addr = std::format!("{:p}", (&STATIC) as *const u8);
+    let addr = std::format!("{:p}", std::ptr::addr_of!(STATIC));
     let fmt = format!("{:p}", &STATIC);
 
     assert_eq!(addr, fmt);
diff --git a/tests/num.rs b/tests/num.rs
index 4bc9a41..82919b8 100644
--- a/tests/num.rs
+++ b/tests/num.rs
@@ -99,10 +99,10 @@ fn test_format_int() {
     assert_eq!(format!("{:X}", 55), "37");
     assert_eq!(format!("{:e}", 55), "5.5e1");
     assert_eq!(format!("{:E}", 55), "5.5E1");
-    assert_eq!(format!("{:e}", 10000000000u64), "1e10");
-    assert_eq!(format!("{:E}", 10000000000u64), "1E10");
-    assert_eq!(format!("{:e}", 10000000001u64), "1.0000000001e10");
-    assert_eq!(format!("{:E}", 10000000001u64), "1.0000000001E10");
+    assert_eq!(format!("{:e}", 10_000_000_000_u64), "1e10");
+    assert_eq!(format!("{:E}", 10_000_000_000_u64), "1E10");
+    assert_eq!(format!("{:e}", 10_000_000_001_u64), "1.0000000001e10");
+    assert_eq!(format!("{:E}", 10_000_000_001_u64), "1.0000000001E10");
 }
 
 #[test]