diff --git a/src/hyperfine/format.rs b/src/hyperfine/format.rs
index 5183f62..0ab88c8 100644
--- a/src/hyperfine/format.rs
+++ b/src/hyperfine/format.rs
@@ -19,7 +19,7 @@ pub fn format_duration_unit(duration: Second, unit: Option<Unit>) -> (String, Un
     if (duration < 1.0 && unit.is_none()) || unit == Some(Unit::MilliSecond) {
         (format!("{:5.1} ms", duration * 1e3), Unit::MilliSecond)
     } else {
-        (format!("{:5.3} s", duration), Unit::Second)
+        (format!("{:6.3} s", duration), Unit::Second)
     }
 }
 
@@ -27,12 +27,12 @@ pub fn format_duration_unit(duration: Second, unit: Option<Unit>) -> (String, Un
 fn test_format_duration_unit_basic() {
     let (out_str, out_unit) = format_duration_unit(1.3, None);
 
-    assert_eq!("1.300 s", out_str);
+    assert_eq!(" 1.300 s", out_str);
     assert_eq!(Unit::Second, out_unit);
 
     let (out_str, out_unit) = format_duration_unit(1.0, None);
 
-    assert_eq!("1.000 s", out_str);
+    assert_eq!(" 1.000 s", out_str);
     assert_eq!(Unit::Second, out_unit);
 
     let (out_str, out_unit) = format_duration_unit(0.999, None);
@@ -55,7 +55,7 @@ fn test_format_duration_unit_basic() {
 fn test_format_duration_unit_with_unit() {
     let (out_str, out_unit) = format_duration_unit(1.3, Some(Unit::Second));
 
-    assert_eq!("1.300 s", out_str);
+    assert_eq!(" 1.300 s", out_str);
     assert_eq!(Unit::Second, out_unit);
 
     let (out_str, out_unit) = format_duration_unit(1.3, Some(Unit::MilliSecond));