diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c4be92c..ea52ca8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -76,7 +76,8 @@ jobs:
     strategy:
       matrix:
         target: [
-          { "os": "ubuntu-latest",  "toolchain": "x86_64-unknown-linux-gnu", "name": "Linux GNU" },
+          { "os": "ubuntu-latest",  "toolchain": "x86_64-unknown-linux-gnu", "name": "Linux GNU (64-bit)" },
+          { "os": "ubuntu-latest",  "toolchain": "i686-unknown-linux-gnu",   "name": "Linux GNU (32-bit)" },
           # TODO: Add some more OS variants here.
         ]
         channel: [stable, beta, nightly]
@@ -97,22 +98,32 @@ jobs:
           sudo apt-get update
           sudo apt-get install weechat-dev
 
+      - if: ${{ matrix.target.toolchain == 'i686-unknown-linux-gnu' }}
+        run: sudo apt-get install libc6-dev-i386
+
+      - run: rustup target add ${{ matrix.target.toolchain }}
+
       - name: Install rust
         uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: ${{ format('{0}-{1}', matrix.channel, matrix.target.toolchain) }}
+          toolchain: ${{ matrix.channel }}
+          targets: ${{ matrix.target.toolchain }}
 
       - uses: Swatinem/rust-cache@v2
 
       - name: Test
-        run: cargo test --all-features
+        run: cargo test --all-features --target ${{ matrix.target.toolchain }}
 
   test-api:
     name: Test Weechat API
+    needs: [test]
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
+        toolchain:
+          - x86_64-unknown-linux-gnu
+          - i686-unknown-linux-gnu
         version:
           - v3.8
           - v4.0.0
@@ -121,6 +132,7 @@ jobs:
           - v4.3.0
           - v4.4.0
           - v4.5.0
+          - v4.6.0
     env:
       WEECHAT_BUNDLED: 'no'
       WEECHAT_PLUGIN_FILE: '${{ github.workspace }}/weechat-src/src/plugins/weechat-plugin.h'
@@ -140,18 +152,24 @@ jobs:
       - run: sudo apt -y update
       - run: sudo apt -y install libclang-dev
 
+      - if: ${{ matrix.toolchain == 'i686-unknown-linux-gnu' }}
+        run: sudo apt-get install libc6-dev-i386
+
+      - run: rustup target add ${{ matrix.toolchain }}
+
       - name: Install rust
         uses: dtolnay/rust-toolchain@master
         with:
+          targets: ${{ matrix.toolchain }}
           toolchain: stable
 
       - uses: Swatinem/rust-cache@v2
 
       - name: Test
-        run: cargo test --all-features
+        run: cargo test --all-features --target ${{ matrix.toolchain }}
 
       - name: Build
-        run: cargo build --all-features
+        run: cargo build --all-features --target ${{ matrix.toolchain }}
 
       - name: Lint
-        run: cargo clippy --all-features
+        run: cargo clippy --all-features --target ${{ matrix.toolchain }}
diff --git a/crates/weechat-sys/build.rs b/crates/weechat-sys/build.rs
index 2fec36a..e032f26 100644
--- a/crates/weechat-sys/build.rs
+++ b/crates/weechat-sys/build.rs
@@ -74,8 +74,8 @@ fn main() {
         }
     };
 
-    println!("cargo:rerun-if-env-changed={}", WEECHAT_BUNDLED_ENV);
-    println!("cargo:rerun-if-env-changed={}", WEECHAT_PLUGIN_FILE_ENV);
+    println!("cargo:rerun-if-env-changed={WEECHAT_BUNDLED_ENV}");
+    println!("cargo:rerun-if-env-changed={WEECHAT_PLUGIN_FILE_ENV}");
 
     let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
     bindings.write_to_file(out_path.join("bindings.rs")).expect("Couldn't write bindings!");
diff --git a/crates/weechat/src/buffer/lines.rs b/crates/weechat/src/buffer/lines.rs
index 66ff459..da7ffd6 100644
--- a/crates/weechat/src/buffer/lines.rs
+++ b/crates/weechat/src/buffer/lines.rs
@@ -187,7 +187,7 @@ impl<'a> BufferLine<'a> {
                 let tag = self.weechat.hdata_string(
                     self.hdata(),
                     self.line_data_pointer,
-                    &format!("{}|tags_array", i),
+                    &format!("{i}|tags_array"),
                 );
                 tags.push(tag);
             }
diff --git a/crates/weechat/src/buffer/mod.rs b/crates/weechat/src/buffer/mod.rs
index 0f096c6..c206efa 100644
--- a/crates/weechat/src/buffer/mod.rs
+++ b/crates/weechat/src/buffer/mod.rs
@@ -1076,7 +1076,7 @@ impl Buffer<'_> {
     /// * `property` - The name of the property for which the value should be
     ///   fetched.
     pub fn get_localvar(&self, property: &str) -> Option<Cow<str>> {
-        self.get_string(&format!("localvar_{}", property))
+        self.get_string(&format!("localvar_{property}"))
     }
 
     /// Set the value of a buffer localvar
@@ -1087,7 +1087,7 @@ impl Buffer<'_> {
     ///
     /// * `value` - The value that the property should get.
     pub fn set_localvar(&self, property: &str, value: &str) {
-        self.set(&format!("localvar_set_{}", property), value)
+        self.set(&format!("localvar_set_{property}"), value)
     }
 
     /// Get the full name of the buffer.
diff --git a/crates/weechat/src/hooks/timer.rs b/crates/weechat/src/hooks/timer.rs
index 3e8b2e3..4eb5982 100644
--- a/crates/weechat/src/hooks/timer.rs
+++ b/crates/weechat/src/hooks/timer.rs
@@ -120,7 +120,7 @@ impl TimerHook {
         let hook_ptr = unsafe {
             hook_timer(
                 weechat.ptr,
-                interval.as_millis() as i64,
+                interval.as_millis() as _,
                 align_second,
                 max_calls,
                 Some(c_hook_cb),
diff --git a/crates/weechat/src/weechat.rs b/crates/weechat/src/weechat.rs
index 07b0258..651e7e9 100644
--- a/crates/weechat/src/weechat.rs
+++ b/crates/weechat/src/weechat.rs
@@ -180,7 +180,7 @@ impl Weechat {
             }
             #[cfg(not(feature = "async"))]
             {
-                println!("thread '{}' panicked: {}", thread_name, info);
+                println!("thread '{thread_name}' panicked: {info}");
             }
         }
     }
@@ -358,7 +358,7 @@ impl Weechat {
     ///
     /// Panics if the method is not called from the main Weechat thread.
     pub fn color_pair(foreground_color: &str, background_color: &str) -> String {
-        Weechat::color(&format!("{},{}", foreground_color, background_color)).to_string()
+        Weechat::color(&format!("{foreground_color},{background_color}")).to_string()
     }
 
     /// Retrieve a prefix value