diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index e71d85239c..6b163dfba4 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [stable, 1.40.0]
+        rust: [stable, 1.42.0]
     steps:
     - uses: actions/checkout@main
     - uses: actions-rs/toolchain@v1
@@ -145,7 +145,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [stable, beta, nightly, 1.40.0]
+        rust: [stable, beta, nightly, 1.42.0]
     steps:
     - uses: actions/checkout@main
     - uses: actions-rs/toolchain@v1
diff --git a/tracing-attributes/tests/async_fn.rs b/tracing-attributes/tests/async_fn.rs
index ac95e94d2e..f7e5f3b743 100644
--- a/tracing-attributes/tests/async_fn.rs
+++ b/tracing-attributes/tests/async_fn.rs
@@ -223,7 +223,7 @@ fn async_fn_with_async_trait_and_fields_expressions_with_generic_parameter() {
         async fn call_with_self(&self) {}
 
         #[instrument(fields(Self=std::any::type_name::<Self>()))]
-        async fn call_with_mut_self(self: &mut Self) {}
+        async fn call_with_mut_self(&mut self) {}
     }
 
     //let span = span::mock().named("call");
diff --git a/tracing-core/src/event.rs b/tracing-core/src/event.rs
index 1c4b7a7936..8c17c3b70f 100644
--- a/tracing-core/src/event.rs
+++ b/tracing-core/src/event.rs
@@ -103,10 +103,7 @@ impl<'a> Event<'a> {
 
     /// Returns true if the new event should be a root.
     pub fn is_root(&self) -> bool {
-        match self.parent {
-            Parent::Root => true,
-            _ => false,
-        }
+        matches!(self.parent, Parent::Root)
     }
 
     /// Returns true if the new event's parent should be determined based on the
@@ -117,10 +114,7 @@ impl<'a> Event<'a> {
     /// thread is _not_ inside a span, then the new event will be the root of its
     /// own trace tree.
     pub fn is_contextual(&self) -> bool {
-        match self.parent {
-            Parent::Current => true,
-            _ => false,
-        }
+        matches!(self.parent, Parent::Current)
     }
 
     /// Returns the new event's explicitly-specified parent, if there is one.
diff --git a/tracing-core/src/metadata.rs b/tracing-core/src/metadata.rs
index c575a55b45..02d3d3469b 100644
--- a/tracing-core/src/metadata.rs
+++ b/tracing-core/src/metadata.rs
@@ -251,18 +251,12 @@ impl Kind {
 
     /// Return true if the callsite kind is `Span`
     pub fn is_span(&self) -> bool {
-        match self {
-            Kind(KindInner::Span) => true,
-            _ => false,
-        }
+        matches!(self, Kind(KindInner::Span))
     }
 
     /// Return true if the callsite kind is `Event`
     pub fn is_event(&self) -> bool {
-        match self {
-            Kind(KindInner::Event) => true,
-            _ => false,
-        }
+        matches!(self, Kind(KindInner::Event))
     }
 }
 
@@ -553,8 +547,7 @@ impl FromStr for LevelFilter {
                 s if s.eq_ignore_ascii_case("trace") => Some(LevelFilter::TRACE),
                 s if s.eq_ignore_ascii_case("off") => Some(LevelFilter::OFF),
                 _ => None,
-            })
-            .ok_or_else(|| ParseLevelFilterError(()))
+            }).ok_or(ParseLevelFilterError(()))
     }
 }
 
diff --git a/tracing-core/src/span.rs b/tracing-core/src/span.rs
index 6dfc41dca6..27dda2475c 100644
--- a/tracing-core/src/span.rs
+++ b/tracing-core/src/span.rs
@@ -153,10 +153,7 @@ impl<'a> Attributes<'a> {
 
     /// Returns true if the new span should be a root.
     pub fn is_root(&self) -> bool {
-        match self.parent {
-            Parent::Root => true,
-            _ => false,
-        }
+        matches!(self.parent, Parent::Root)
     }
 
     /// Returns true if the new span's parent should be determined based on the
@@ -167,10 +164,7 @@ impl<'a> Attributes<'a> {
     /// thread is _not_ inside a span, then the new span will be the root of its
     /// own trace tree.
     pub fn is_contextual(&self) -> bool {
-        match self.parent {
-            Parent::Current => true,
-            _ => false,
-        }
+        matches!(self.parent, Parent::Current)
     }
 
     /// Returns the new span's explicitly-specified parent, if there is one.
@@ -270,10 +264,7 @@ impl Current {
     /// [`metadata`]: #method.metadata
     /// [`into_inner`]: #method.into_inner
     pub fn is_known(&self) -> bool {
-        match self.inner {
-            CurrentInner::Unknown => false,
-            _ => true,
-        }
+        !matches!(self.inner, CurrentInner::Unknown)
     }
 
     /// Consumes `self` and returns the span `Id` and `Metadata` of the current
diff --git a/tracing-core/src/subscriber.rs b/tracing-core/src/subscriber.rs
index 2b56f8d483..cc62ee8584 100644
--- a/tracing-core/src/subscriber.rs
+++ b/tracing-core/src/subscriber.rs
@@ -528,30 +528,21 @@ impl Interest {
     /// about this callsite.
     #[inline]
     pub fn is_never(&self) -> bool {
-        match self.0 {
-            InterestKind::Never => true,
-            _ => false,
-        }
+        matches!(self.0, InterestKind::Never)
     }
 
     /// Returns `true` if the subscriber is sometimes interested in being notified
     /// about this callsite.
     #[inline]
     pub fn is_sometimes(&self) -> bool {
-        match self.0 {
-            InterestKind::Sometimes => true,
-            _ => false,
-        }
+        matches!(self.0, InterestKind::Sometimes)
     }
 
     /// Returns `true` if the subscriber is always interested in being notified
     /// about this callsite.
     #[inline]
     pub fn is_always(&self) -> bool {
-        match self.0 {
-            InterestKind::Always => true,
-            _ => false,
-        }
+        matches!(self.0, InterestKind::Always)
     }
 
     /// Returns the common interest between these two Interests.
diff --git a/tracing-subscriber/src/fmt/format/mod.rs b/tracing-subscriber/src/fmt/format/mod.rs
index ed825af12a..5f57711cb5 100644
--- a/tracing-subscriber/src/fmt/format/mod.rs
+++ b/tracing-subscriber/src/fmt/format/mod.rs
@@ -1052,22 +1052,13 @@ impl FmtSpanConfig {
         }
     }
     pub(super) fn trace_new(&self) -> bool {
-        match self.kind {
-            FmtSpan::FULL => true,
-            _ => false,
-        }
+        matches!(self.kind, FmtSpan::FULL)
     }
     pub(super) fn trace_active(&self) -> bool {
-        match self.kind {
-            FmtSpan::ACTIVE | FmtSpan::FULL => true,
-            _ => false,
-        }
+        matches!(self.kind, FmtSpan::ACTIVE | FmtSpan::FULL)
     }
     pub(super) fn trace_close(&self) -> bool {
-        match self.kind {
-            FmtSpan::CLOSE | FmtSpan::FULL => true,
-            _ => false,
-        }
+        matches!(self.kind, FmtSpan::CLOSE | FmtSpan::FULL)
     }
 }
 
diff --git a/tracing-subscriber/src/reload.rs b/tracing-subscriber/src/reload.rs
index 961f60acb3..14a069dae0 100644
--- a/tracing-subscriber/src/reload.rs
+++ b/tracing-subscriber/src/reload.rs
@@ -210,19 +210,13 @@ impl Error {
     /// Returns `true` if this error occurred because the layer was poisoned by
     /// a panic on another thread.
     pub fn is_poisoned(&self) -> bool {
-        match self.kind {
-            ErrorKind::Poisoned => true,
-            _ => false,
-        }
+        matches!(self.kind, ErrorKind::Poisoned)
     }
 
     /// Returns `true` if this error occurred because the `Subscriber`
     /// containing the reloadable layer was dropped.
     pub fn is_dropped(&self) -> bool {
-        match self.kind {
-            ErrorKind::SubscriberGone => true,
-            _ => false,
-        }
+        matches!(self.kind, ErrorKind::SubscriberGone)
     }
 }
 
diff --git a/tracing/tests/support/subscriber.rs b/tracing/tests/support/subscriber.rs
index 3f90e8daf9..172e99db21 100644
--- a/tracing/tests/support/subscriber.rs
+++ b/tracing/tests/support/subscriber.rs
@@ -213,11 +213,7 @@ where
             "[{}] record: {}; id={:?}; values={:?};",
             self.name, span.name, id, values
         );
-        let was_expected = if let Some(Expect::Visit(_, _)) = expected.front() {
-            true
-        } else {
-            false
-        };
+        let was_expected = matches!(expected.front(), Some(Expect::Visit(_, _)));
         if was_expected {
             if let Expect::Visit(expected_span, mut expected_values) = expected.pop_front().unwrap()
             {
@@ -319,10 +315,7 @@ where
             id
         );
         let mut expected = self.expected.lock().unwrap();
-        let was_expected = match expected.front() {
-            Some(Expect::NewSpan(_)) => true,
-            _ => false,
-        };
+        let was_expected = matches!(expected.front(), Some(Expect::NewSpan(_)));
         let mut spans = self.spans.lock().unwrap();
         if was_expected {
             if let Expect::NewSpan(mut expected) = expected.pop_front().unwrap() {