diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 285b04b..7532199 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -43,7 +43,10 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Run tests
-        run: cargo test
+        run: |
+          cargo clippy --all-targets --all-features -- -D warnings
+          cargo fmt --all -- --check
+          cargo test
 
   miri:
     runs-on: ${{ matrix.os }}
@@ -111,7 +114,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Test with ASAN
-        run: cargo test --tests --target x86_64-unknown-linux-gnu
+        run: cargo test --tests --target x86_64-unknown-linux-gnu --features asan
         env:
           RUST_TARGET: x86_64-unknown-linux-gnu
           RUST_BACKTRACE: 1
diff --git a/Cargo.toml b/Cargo.toml
index 4073608..1fc0439 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,6 +18,7 @@ path = "examples/escape.rs"
 
 [features]
 codspeed = ["criterion2/codspeed"]
+asan = [] # for ASAN
 
 [[bench]]
 name = "escape"
diff --git a/src/lib.rs b/src/lib.rs
index a3e2e8f..12d3644 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -521,8 +521,16 @@ mod tests {
         for i in 0u8..32 {
             let s = String::from_utf8(vec![i]).unwrap();
             let result = escape(&s);
-            let expected = serde_json::to_string(&s).unwrap();
-            assert_eq!(result, expected, "Failed for byte 0x{:02x}", i);
+            let expected = String::from_utf8(QUOTE_TAB[i as usize].1.to_vec())
+                .unwrap()
+                .trim_end_matches('\0')
+                .to_string();
+            assert_eq!(
+                result,
+                format!("\"{}\"", expected),
+                "Failed for byte 0x{:02x}",
+                i
+            );
         }
     }
 
diff --git a/src/simd/avx2.rs b/src/simd/avx2.rs
index c1cac44..db581ad 100644
--- a/src/simd/avx2.rs
+++ b/src/simd/avx2.rs
@@ -232,7 +232,7 @@ pub unsafe fn format_string(value: &str, dst: &mut [u8]) -> usize {
                         std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                         Simd256u::loadu(placeholder[..].as_ptr())
                     } else {
-                        #[cfg(any(debug_assertions, miri))]
+                        #[cfg(any(debug_assertions, miri, feature = "asan"))]
                         {
                             std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                             Simd256u::loadu(placeholder[..].as_ptr())
diff --git a/src/simd/avx512.rs b/src/simd/avx512.rs
index a1ac242..e165894 100644
--- a/src/simd/avx512.rs
+++ b/src/simd/avx512.rs
@@ -225,7 +225,7 @@ pub unsafe fn format_string(value: &str, dst: &mut [u8]) -> usize {
                         std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                         Simd512u::loadu(placeholder[..].as_ptr())
                     } else {
-                        #[cfg(any(debug_assertions, miri))]
+                        #[cfg(any(debug_assertions, miri, feature = "asan"))]
                         {
                             std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                             Simd512u::loadu(placeholder[..].as_ptr())
diff --git a/src/simd/neon.rs b/src/simd/neon.rs
index 0300fc1..a177c77 100644
--- a/src/simd/neon.rs
+++ b/src/simd/neon.rs
@@ -233,7 +233,7 @@ pub unsafe fn format_string(value: &str, dst: &mut [u8]) -> usize {
                         std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                         Simd128u::loadu(placeholder[..].as_ptr())
                     } else {
-                        #[cfg(any(debug_assertions, miri))]
+                        #[cfg(any(debug_assertions, miri, feature = "asan"))]
                         {
                             std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                             Simd128u::loadu(placeholder[..].as_ptr())
diff --git a/src/simd/sse2.rs b/src/simd/sse2.rs
index cdcc112..45d42b0 100644
--- a/src/simd/sse2.rs
+++ b/src/simd/sse2.rs
@@ -229,7 +229,7 @@ pub unsafe fn format_string(value: &str, dst: &mut [u8]) -> usize {
                         std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                         Simd128u::loadu(placeholder[..].as_ptr())
                     } else {
-                        #[cfg(any(debug_assertions, miri))]
+                        #[cfg(any(debug_assertions, miri, feature = "asan"))]
                         {
                             std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                             Simd128u::loadu(placeholder[..].as_ptr())
diff --git a/src/simd/v128.rs b/src/simd/v128.rs
index 0e20392..5ed04d1 100644
--- a/src/simd/v128.rs
+++ b/src/simd/v128.rs
@@ -161,7 +161,7 @@ pub fn format_string(value: &str, dst: &mut [u8]) -> usize {
                         std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                         Simd128u::loadu(placeholder[..].as_ptr())
                     } else {
-                        #[cfg(any(debug_assertions, miri))]
+                        #[cfg(any(debug_assertions, miri, feature = "asan"))]
                         {
                             std::ptr::copy_nonoverlapping(sptr, placeholder[..].as_mut_ptr(), nb);
                             Simd128u::loadu(placeholder[..].as_ptr())