diff --git a/CMakeLists.txt b/CMakeLists.txt
index e06d69b26..05fb63613 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,7 +80,11 @@ option(USE_VALGRIND "Use valgrind when testing" true)
 option(WITH_RUST "Use rust implemented internals (experimental)" false)
 if (WITH_RUST)
     add_subdirectory(cmake/corrosion)
-    corrosion_import_crate(MANIFEST_PATH Cargo.toml CRATES chewing FEATURES capi)
+    if (${CMAKE_BUILD_TYPE} STREQUAL "Debug")
+        corrosion_import_crate(MANIFEST_PATH Cargo.toml CRATES chewing FEATURES capi test-tracing)
+    else()
+        corrosion_import_crate(MANIFEST_PATH Cargo.toml CRATES chewing FEATURES capi)
+    endif()
     corrosion_import_crate(MANIFEST_PATH Cargo.toml CRATES chewing-tools)
     add_compile_definitions(WITH_RUST)
 endif()
diff --git a/Cargo.lock b/Cargo.lock
index 8d0e533ba..8c1245b7b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,6 +14,15 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "allocator-api2"
 version = "0.2.16"
@@ -22,9 +31,9 @@ checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
 
 [[package]]
 name = "anyhow"
-version = "1.0.77"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9d19de80eff169429ac1e9f48fffb163916b448a44e8e046186232046d9e1f9"
+checksum = "ca87830a3e3fb156dc96cfbd31cb620265dd053be734723f22b760d6cc3c3051"
 
 [[package]]
 name = "argh"
@@ -153,6 +162,7 @@ dependencies = [
  "tempfile",
  "thiserror",
  "tracing",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -322,6 +332,12 @@ version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.151"
@@ -362,6 +378,31 @@ version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
 
+[[package]]
+name = "matchers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata 0.1.10",
+]
+
+[[package]]
+name = "memchr"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
+
+[[package]]
+name = "nu-ansi-term"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
+dependencies = [
+ "overload",
+ "winapi",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.19.0"
@@ -380,6 +421,12 @@ version = "6.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2355d85b9a3786f481747ced0e0ff2ba35213a1f9bd406ed906554d7af805a1"
 
+[[package]]
+name = "overload"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.13"
@@ -394,9 +441,9 @@ checksum = "69d3587f8a9e599cc7ec2c00e331f71c4e69a5f9a4b8a6efd5b07466b9736f9a"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.71"
+version = "1.0.72"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75cb1540fadbd5b8fbccc4dddad2734eba435053f725621c070711a14bb5f4b8"
+checksum = "a293318316cf6478ec1ad2a21c49390a8d5b5eae9fab736467d93fbc0edc29c5"
 dependencies = [
  "unicode-ident",
 ]
@@ -430,6 +477,50 @@ dependencies = [
  "thiserror",
 ]
 
+[[package]]
+name = "regex"
+version = "1.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata 0.4.3",
+ "regex-syntax 0.8.2",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax 0.6.29",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax 0.8.2",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+
 [[package]]
 name = "riff"
 version = "2.0.0"
@@ -500,6 +591,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "smallvec"
 version = "1.11.2"
@@ -564,24 +664,34 @@ checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
 
 [[package]]
 name = "thiserror"
-version = "1.0.52"
+version = "1.0.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83a48fd946b02c0a526b2e9481c8e2a17755e47039164a86c4070446e3a4614d"
+checksum = "b2cd5904763bad08ad5513ddbb12cf2ae273ca53fa9f68e843e236ec6dfccc09"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.52"
+version = "1.0.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7fbe9b594d6568a6a1443250a7e67d80b74e1e96f6d1715e1e21cc1888291d3"
+checksum = "3dcf4a824cce0aeacd6f38ae6f24234c8e80d68632338ebaa1443b5df9e29e19"
 dependencies = [
  "proc-macro2",
  "quote",
  "syn 2.0.43",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+]
+
 [[package]]
 name = "toml"
 version = "0.5.11"
@@ -620,6 +730,36 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c06d3da6113f116aaee68e4d601191614c9053067f9ab7f6edbcb161237daa54"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad0f048c97dbd9faa9b7df56362b8ebcaa52adb06b498c050d2f4e32f90a7a8b"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
 ]
 
 [[package]]
@@ -628,6 +768,12 @@ version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
+[[package]]
+name = "valuable"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
diff --git a/Cargo.toml b/Cargo.toml
index fb850ddad..916908d46 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,13 +10,19 @@ edition = "2021"
 include = ["src/**/*.rs", "Cargo.toml", "AUTHORS", "COPYING", "NEWS"]
 
 [dependencies]
-bytemuck = { version = "1.13.1", features = ["derive"] }
+bytemuck = { version = "1.14.0", features = ["derive"] }
 directories = "5.0.0"
-indexmap = "2.0.0"
+indexmap = "2.1.0"
 riff = "2.0.0"
 rusqlite = "0.30.0"
 thiserror = "1.0.0"
-tracing = "0.1.37"
+tracing = { version = "0.1.40", features = [
+    "max_level_trace",
+    "release_max_level_warn",
+] }
+tracing-subscriber = { version = "0.3.18", features = [
+    "env-filter",
+], optional = true }
 
 [target.'cfg(windows)'.dependencies]
 rusqlite = { version = "0.30.0", features = ["bundled"] }
@@ -27,6 +33,7 @@ crate-type = ["lib", "staticlib"]
 [features]
 default = []
 capi = ["cbindgen"]
+test-tracing = ["tracing-subscriber"]
 
 [build-dependencies]
 # https://github.com/mozilla/cbindgen/issues/891
diff --git a/src/capi/io.rs b/src/capi/io.rs
index cf0a551d2..f599e83a7 100644
--- a/src/capi/io.rs
+++ b/src/capi/io.rs
@@ -728,7 +728,8 @@ pub extern "C" fn chewing_set_logger(
     logger: extern "C" fn(data: *mut c_void, level: c_int, fmt: *const c_char, arg: ...),
     data: *mut c_void,
 ) {
-    // let _ = tracing_subscriber::fmt::try_init();
+    #[cfg(all(feature = "test-tracing", debug_assertions))]
+    let _ = tracing_subscriber::fmt::try_init();
 }
 
 #[tracing::instrument(skip(ctx), ret)]