diff --git a/src/datetime/tests.rs b/src/datetime/tests.rs
index f53b3c953a..b25058ffe6 100644
--- a/src/datetime/tests.rs
+++ b/src/datetime/tests.rs
@@ -307,7 +307,7 @@ fn test_nanosecond_range() {
     // Far beyond range
     let maximum = "2262-04-11T23:47:16.854775804UTC";
     let parsed: DateTime<Utc> = maximum.parse().unwrap();
-    let beyond_max = parsed + TimeDelta::days(365);
+    let beyond_max = parsed + Days::new(365);
     assert!(beyond_max.timestamp_nanos_opt().is_none());
 }
 
@@ -1455,20 +1455,16 @@ fn test_datetime_before_windows_api_limits() {
 #[test]
 #[cfg(feature = "clock")]
 fn test_years_elapsed() {
-    const WEEKS_PER_YEAR: f32 = 52.1775;
-
-    // This is always at least one year because 1 year = 52.1775 weeks.
-    let one_year_ago =
-        Utc::now().date_naive() - TimeDelta::weeks((WEEKS_PER_YEAR * 1.5).ceil() as i64);
-    // A bit more than 2 years.
-    let two_year_ago =
-        Utc::now().date_naive() - TimeDelta::weeks((WEEKS_PER_YEAR * 2.5).ceil() as i64);
+    // A bit more than 1 year
+    let one_year_ago = Utc::now().date_naive() - Days::new(400);
+    // A bit more than 2 years
+    let two_year_ago = Utc::now().date_naive() - Days::new(750);
 
     assert_eq!(Utc::now().date_naive().years_since(one_year_ago), Some(1));
     assert_eq!(Utc::now().date_naive().years_since(two_year_ago), Some(2));
 
     // If the given DateTime is later than now, the function will always return 0.
-    let future = Utc::now().date_naive() + TimeDelta::weeks(12);
+    let future = Utc::now().date_naive() + Days(100);
     assert_eq!(Utc::now().date_naive().years_since(future), None);
 }
 
diff --git a/src/offset/local/mod.rs b/src/offset/local/mod.rs
index b379b39e46..3b71a9a0ab 100644
--- a/src/offset/local/mod.rs
+++ b/src/offset/local/mod.rs
@@ -273,7 +273,7 @@ mod tests {
     #[cfg(windows)]
     use crate::offset::local::{lookup_with_dst_transitions, Transition};
     use crate::offset::TimeZone;
-    use crate::{Datelike, TimeDelta, Utc};
+    use crate::{Datelike, Days, Utc};
     #[cfg(windows)]
     use crate::{FixedOffset, LocalResult, NaiveDate, NaiveDateTime};
 
@@ -292,7 +292,7 @@ mod tests {
 
     #[test]
     fn verify_correct_offsets_distant_past() {
-        let distant_past = Local::now() - TimeDelta::days(365 * 500);
+        let distant_past = Local::now() - Days::new(365 * 500);
         let from_local = Local.from_local_datetime(&distant_past.naive_local()).unwrap();
         let from_utc = Local.from_utc_datetime(&distant_past.naive_utc());
 
@@ -305,7 +305,7 @@ mod tests {
 
     #[test]
     fn verify_correct_offsets_distant_future() {
-        let distant_future = Local::now() + TimeDelta::days(365 * 35000);
+        let distant_future = Local::now() + Days::new(365 * 35000);
         let from_local = Local.from_local_datetime(&distant_future.naive_local()).unwrap();
         let from_utc = Local.from_utc_datetime(&distant_future.naive_utc());
 
diff --git a/src/traits.rs b/src/traits.rs
index ae6cde494f..e582093b0b 100644
--- a/src/traits.rs
+++ b/src/traits.rs
@@ -330,7 +330,7 @@ pub trait Timelike: Sized {
 #[cfg(test)]
 mod tests {
     use super::Datelike;
-    use crate::{NaiveDate, TimeDelta};
+    use crate::{Days, NaiveDate};
 
     /// Tests `Datelike::num_days_from_ce` against an alternative implementation.
     ///
@@ -377,7 +377,7 @@ mod tests {
                 "on {:?}",
                 jan1_year
             );
-            let mid_year = jan1_year + TimeDelta::days(133);
+            let mid_year = jan1_year + Days::new(133);
             assert_eq!(
                 mid_year.num_days_from_ce(),
                 num_days_from_ce(&mid_year),
diff --git a/tests/dateutils.rs b/tests/dateutils.rs
index cf3d908a4b..c833c9fe20 100644
--- a/tests/dateutils.rs
+++ b/tests/dateutils.rs
@@ -157,6 +157,6 @@ fn try_verify_against_date_command_format() {
     let mut date = NaiveDate::from_ymd_opt(1970, 1, 1).unwrap().and_hms_opt(12, 11, 13).unwrap();
     while date.year() < 2008 {
         verify_against_date_command_format_local(DATE_PATH, date);
-        date += chrono::TimeDelta::days(55);
+        date = date + Days::new(55);
     }
 }