diff --git a/crates/arti-testing/src/rt/badtcp.rs b/crates/arti-testing/src/rt/badtcp.rs
index 65dfa9d11..f950275aa 100644
--- a/crates/arti-testing/src/rt/badtcp.rs
+++ b/crates/arti-testing/src/rt/badtcp.rs
@@ -154,7 +154,7 @@ impl<R: Runtime> TcpProvider for BrokenTcpProvider<R> {
                 Ok(BreakableTcpStream::Present(conn))
             }
             Action::Fail(dur, kind) => {
-                let d = thread_rng().gen_range(Duration::from_secs(0)..dur);
+                let d = thread_rng().gen_range(Duration::from_secs(0)..=dur);
                 self.inner.sleep(d).await;
                 Err(IoError::new(kind, anyhow::anyhow!("intentional failure")))
             }
diff --git a/crates/tor-circmgr/src/mgr.rs b/crates/tor-circmgr/src/mgr.rs
index d9ff4f7a8..ae166d0f3 100644
--- a/crates/tor-circmgr/src/mgr.rs
+++ b/crates/tor-circmgr/src/mgr.rs
@@ -1477,7 +1477,7 @@ impl<B: AbstractCircBuilder + 'static, R: Runtime> AbstractCircMgr<B, R> {
             // padding.
             use rand::Rng;
             let mut rng = rand::thread_rng();
-            rng.gen_range(timings.not_learning..timings.not_learning * 2)
+            rng.gen_range(timings.not_learning..=timings.not_learning * 2)
         }
     }
 }
diff --git a/crates/tor-dirmgr/src/state.rs b/crates/tor-dirmgr/src/state.rs
index 03369f5eb..4f6985dc9 100644
--- a/crates/tor-dirmgr/src/state.rs
+++ b/crates/tor-dirmgr/src/state.rs
@@ -1156,7 +1156,7 @@ impl<R: Runtime> DirState for GetMicrodescsState<R> {
 fn pick_download_time(lifetime: &Lifetime) -> SystemTime {
     let (lowbound, uncertainty) = client_download_range(lifetime);
     let zero = Duration::new(0, 0);
-    lowbound + rand::thread_rng().gen_range(zero..uncertainty)
+    lowbound + rand::thread_rng().gen_range(zero..=uncertainty)
 }
 
 /// Based on the lifetime for a consensus, return the time range during which
diff --git a/crates/tor-guardmgr/src/util.rs b/crates/tor-guardmgr/src/util.rs
index 43f155bcd..75966e4d0 100644
--- a/crates/tor-guardmgr/src/util.rs
+++ b/crates/tor-guardmgr/src/util.rs
@@ -12,7 +12,7 @@ use std::time::{Duration, SystemTime};
 /// an attempt to make some kinds of traffic analysis attacks a bit
 /// harder for an attacker who can read our state after the fact.
 pub(crate) fn randomize_time<R: Rng>(rng: &mut R, when: SystemTime, max: Duration) -> SystemTime {
-    let offset = rng.gen_range(Duration::ZERO..max);
+    let offset = rng.gen_range(Duration::ZERO..=max);
     let random = when
         .checked_sub(offset)
         .unwrap_or(SystemTime::UNIX_EPOCH)