diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 41df7da..6dd881a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
 
     strategy:
       matrix:
-        toolchain: [ "msrv", "stable", "nightly" ]
+        toolchain: [ "stable", "nightly" ]
         target: [ "i686-unknown-linux-gnu", "x86_64-unknown-linux-gnu" ]
 
     name: Build & Test (toolchain:${{ matrix.toolchain }}, target:${{ matrix.target }})
@@ -138,23 +138,27 @@ jobs:
 
     - name: Check lib
       run: cargo +${{ env.CRATE_TOOLCHAIN }} check --target ${{ matrix.target }} --lib --verbose
-      if: ${{ matrix.toolchain == 'msrv' }}
     
     - name: Check extras
       run: cargo +${{ env.CRATE_TOOLCHAIN }} check --target ${{ matrix.target }} --all-targets --verbose
-      if: ${{ matrix.toolchain != 'msrv' }}
 
-    - name: Test
-      run: cargo +${{ env.CRATE_TOOLCHAIN }} test --target ${{ matrix.target }} --verbose
+    - name: Test (doc)
+      run: cargo +${{ env.CRATE_TOOLCHAIN }} test --target ${{ matrix.target }} --verbose --doc
       # Only run tests when targetting x86 (32- or 64-bit) - we're executing on
       # x86_64, so we can't run tests for any non-x86 target.
-      if: ${{ matrix.toolchain != 'msrv' && (contains(matrix.target, 'x86_64') || contains(matrix.target, 'i686')) }}
+      if: ${{ matrix.toolchain == 'nightly' && (contains(matrix.target, 'x86_64') || contains(matrix.target, 'i686')) }}
+
+    - name: Test (integration)
+      run: cargo +${{ env.CRATE_TOOLCHAIN }} test --target ${{ matrix.target }} --verbose --tests
+      # Only run tests when targetting x86 (32- or 64-bit) - we're executing on
+      # x86_64, so we can't run tests for any non-x86 target.
+      if: ${{ (contains(matrix.target, 'x86_64') || contains(matrix.target, 'i686')) }}
 
     - name: Test (loom)
       run: cargo +${{ env.CRATE_TOOLCHAIN }} test --target ${{ matrix.target }} --verbose --release --tests
       # Only run tests when targetting x86 (32- or 64-bit) - we're executing on
       # x86_64, so we can't run tests for any non-x86 target.
-      if: ${{ matrix.toolchain != 'msrv' && (contains(matrix.target, 'x86_64') || contains(matrix.target, 'aarch64')) }}
+      if: ${{ (contains(matrix.target, 'x86_64') || contains(matrix.target, 'aarch64')) }}
       env:
         RUSTFLAGS: --cfg loom ${{ env.RUSTFLAGS }}
 
@@ -198,19 +202,6 @@ jobs:
           set -e
           cargo clippy --all-targets
 
-  check_msrv:
-    runs-on: ubuntu-latest
-    name: Check MSRVs match
-    steps:
-      - uses: actions/checkout@v3
-      - name: Rust Cache
-        uses: Swatinem/rust-cache@v2.0.0
-      - uses: extractions/setup-just@v1
-      # Make sure that the MSRV in async-backtrace's and async-backtrace-attributes's
-      # `Cargo.toml` files are the same.
-      - name: Check MSRVs match
-        run: just check-msrv
-
   check_readme:
     runs-on: ubuntu-latest
     name: Check README is correctly generated.
@@ -219,7 +210,7 @@ jobs:
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2.0.0
       - uses: extractions/setup-just@v1
-      - name: Check MSRVs match
+      - name: Check README matches
         run: |
           set -e
           cargo install cargo-readme --version 3.2.0
@@ -233,7 +224,6 @@ jobs:
       - build_test
       - check_fmt
       - check_clippy
-      - check_msrv
       - check_readme
     runs-on: ubuntu-latest
     steps:
diff --git a/attributes/Cargo.toml b/attributes/Cargo.toml
index 9656849..398d134 100644
--- a/attributes/Cargo.toml
+++ b/attributes/Cargo.toml
@@ -3,7 +3,6 @@ name = "async-backtrace-attributes"
 version = "0.2.6"
 edition = "2018"
 license = "MIT"
-rust-version = "1.59"
 description = "Procedural macros for the `async-backtrace` crate."
 repository = "https://github.com/tokio-rs/async-backtrace"
 
diff --git a/backtrace/Cargo.toml b/backtrace/Cargo.toml
index df91e6e..ce1be6a 100644
--- a/backtrace/Cargo.toml
+++ b/backtrace/Cargo.toml
@@ -4,7 +4,6 @@ version = "0.2.6"
 edition = "2018"
 license = "MIT"
 readme = "../README.md"
-rust-version = "1.59"
 description = "Efficient, logical 'backtraces' of async tasks."
 repository = "https://github.com/tokio-rs/async-backtrace"
 categories = ["asynchronous", "development-tools::debugging"]
diff --git a/backtrace/src/frame.rs b/backtrace/src/frame.rs
index 02ddfa4..15821d6 100644
--- a/backtrace/src/frame.rs
+++ b/backtrace/src/frame.rs
@@ -364,7 +364,7 @@ impl Frame {
     }
 
     /// Produces an iterator over this frame's ancestors.
-    pub fn backtrace(&self) -> impl Iterator<Item = &Frame> + FusedIterator {
+    pub fn backtrace(&self) -> impl FusedIterator<Item = &Frame> {
         /// An iterator that traverses up the tree of [`Frame`]s from a leaf.
         #[derive(Clone)]
         pub(crate) struct Backtrace<'a> {
@@ -399,7 +399,7 @@ impl Frame {
     /// The caller must ensure that the corresponding Kind::Root{mutex} is
     /// locked.  The caller must also ensure that the returned iterator is
     /// dropped before the mutex is dropped.
-    pub(crate) unsafe fn subframes(&self) -> impl Iterator<Item = &Frame> + FusedIterator {
+    pub(crate) unsafe fn subframes(&self) -> impl FusedIterator<Item = &Frame> {
         pub(crate) struct Subframes<'a> {
             iter: linked_list::Iter<'a, Frame>,
         }
diff --git a/backtrace/src/location.rs b/backtrace/src/location.rs
index b2cebd8..84a1053 100644
--- a/backtrace/src/location.rs
+++ b/backtrace/src/location.rs
@@ -9,15 +9,14 @@ use futures::Future;
 ///
 /// #[tokio::main]
 /// async fn main() {
-/// #   macro_rules! assert_eq { ($l:expr, $r:expr) => { debug_assert_eq!($l.len(), $r.len()); } }
-///     assert_eq!(location!().to_string(), "rust_out::main::{{closure}} at src/location.rs:8:16");
+///     assert_eq!(location!().to_string(), "rust_out::main::{{closure}} at backtrace/src/location.rs:8:16");
 ///
 ///     async {
-///         assert_eq!(location!().to_string(), "rust_out::main::{{closure}}::{{closure}} at src/location.rs:11:20");
+///         assert_eq!(location!().to_string(), "rust_out::main::{{closure}}::{{closure}} at backtrace/src/location.rs:11:20");
 ///     }.await;
 ///     
 ///     (|| async {
-///         assert_eq!(location!().to_string(), "rust_out::main::{{closure}}::{{closure}}::{{closure}} at src/location.rs:15:20");
+///         assert_eq!(location!().to_string(), "rust_out::main::{{closure}}::{{closure}}::{{closure}} at backtrace/src/location.rs:15:20");
 ///     })().await;
 /// }
 /// ```