diff --git a/Cargo.lock b/Cargo.lock
index 1f66916a3..1eceaa613 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -28,42 +28,51 @@ dependencies = [
 
 [[package]]
 name = "anstream"
-version = "0.2.6"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "342258dd14006105c2b75ab1bd7543a03bdf0cfc94383303ac212a04939dff6f"
+checksum = "9e579a7752471abc2a8268df8b20005e3eadd975f585398f17efcfd8d4927371"
 dependencies = [
  "anstyle",
  "anstyle-parse",
+ "anstyle-query",
  "anstyle-wincon",
- "concolor-override",
- "concolor-query",
+ "colorchoice",
  "is-terminal",
  "utf8parse",
 ]
 
 [[package]]
 name = "anstyle"
-version = "0.3.5"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23ea9e81bd02e310c216d080f6223c179012256e5151c41db88d12c88a1684d2"
+checksum = "41ed9a86bf92ae6580e0a31281f65a1b1d867c0cc68d5346e2ae128dddfa6a7d"
 
 [[package]]
 name = "anstyle-parse"
-version = "0.1.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7d1bb534e9efed14f3e5f44e7dd1a4f709384023a4165199a4241e18dff0116"
+checksum = "e765fd216e48e067936442276d1d57399e37bce53c264d6fefbe298080cb57ee"
 dependencies = [
  "utf8parse",
 ]
 
 [[package]]
-name = "anstyle-wincon"
-version = "0.2.0"
+name = "anstyle-query"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3127af6145b149f3287bb9a0d10ad9c5692dba8c53ad48285e5bec4063834fa"
+checksum = "5ca11d4be1bab0c8bc8734a9aa7bf4ee8316d462a08c6ac5052f888fef5b494b"
+dependencies = [
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4bcd8291a340dd8ac70e18878bc4501dd7b4ff970cfa21c207d36ece51ea88fd"
 dependencies = [
  "anstyle",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -84,6 +93,17 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi 0.1.19",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -140,6 +160,18 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitvec"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
+dependencies = [
+ "funty",
+ "radium",
+ "tap",
+ "wyz",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.12.0"
@@ -202,9 +234,24 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.2.1"
+version = "3.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "046ae530c528f252094e4a77886ee1374437744b2bff1497aa898bbddbbb29b3"
+checksum = "71655c45cb9845d3270c9d6df84ebe72b4dad3c2ba3f7023ad47c144e4e473a5"
+dependencies = [
+ "atty",
+ "bitflags",
+ "clap_lex 0.2.4",
+ "indexmap",
+ "strsim",
+ "termcolor",
+ "textwrap",
+]
+
+[[package]]
+name = "clap"
+version = "4.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "956ac1f6381d8d82ab4684768f89c0ea3afe66925ceadb4eeb3fc452ffc55d62"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -213,14 +260,14 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.2.1"
+version = "4.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "223163f58c9a40c3b0a43e1c4b50a9ce09f007ea2cb1ec258a687945b4b7929f"
+checksum = "84080e799e54cff944f4b4a4b0e71630b0e0443b25b985175c7dddc1a859b749"
 dependencies = [
  "anstream",
  "anstyle",
  "bitflags",
- "clap_lex",
+ "clap_lex 0.4.1",
  "strsim",
 ]
 
@@ -230,7 +277,7 @@ version = "4.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01c22dcfb410883764b29953103d9ef7bb8fe21b3fa1158bc99986c2067294bd"
 dependencies = [
- "clap",
+ "clap 4.2.4",
 ]
 
 [[package]]
@@ -242,7 +289,16 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.11",
+ "syn 2.0.15",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
+dependencies = [
+ "os_str_bytes",
 ]
 
 [[package]]
@@ -257,7 +313,7 @@ version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4237e29de9c6949982ba87d51709204504fb8ed2fd38232fcb1e5bf7d4ba48c8"
 dependencies = [
- "clap",
+ "clap 4.2.4",
  "roff",
 ]
 
@@ -277,6 +333,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 
+[[package]]
+name = "colorchoice"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
+
 [[package]]
 name = "comemo"
 version = "0.2.2"
@@ -298,26 +360,11 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "concolor-override"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a855d4a1978dc52fb0536a04d384c2c0c1aa273597f08b77c8c4d3b2eec6037f"
-
-[[package]]
-name = "concolor-query"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88d11d52c3d7ca2e6d0040212be9e4dbbcd78b6447f535b6b561f449427944cf"
-dependencies = [
- "windows-sys 0.45.0",
-]
-
 [[package]]
 name = "core-foundation-sys"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
 
 [[package]]
 name = "crc32fast"
@@ -330,14 +377,38 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.7"
+version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf2b3e8478797446514c91ef04bafcb59faba183e621ad488df88983cc14128c"
+checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
 dependencies = [
  "cfg-if",
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
+dependencies = [
+ "cfg-if",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46bd5f3f85273295a9d14aedfb86f6aadbff6d8f5295c4a9edb08e819dcf5695"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "crossbeam-utils",
+ "memoffset",
+ "scopeguard",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.15"
@@ -370,9 +441,9 @@ dependencies = [
 
 [[package]]
 name = "cxx"
-version = "1.0.93"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9c00419335c41018365ddf7e4d5f1c12ee3659ddcf3e01974650ba1de73d038"
+checksum = "f61f1b6389c3fe1c316bf8a4dccc90a38208354b330925bce1f74a6c4756eb93"
 dependencies = [
  "cc",
  "cxxbridge-flags",
@@ -382,9 +453,9 @@ dependencies = [
 
 [[package]]
 name = "cxx-build"
-version = "1.0.93"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb8307ad413a98fff033c8545ecf133e3257747b3bae935e7602aab8aa92d4ca"
+checksum = "12cee708e8962df2aeb38f594aae5d827c022b6460ac71a7a3e2c3c2aae5a07b"
 dependencies = [
  "cc",
  "codespan-reporting",
@@ -392,24 +463,24 @@ dependencies = [
  "proc-macro2",
  "quote",
  "scratch",
- "syn 2.0.11",
+ "syn 2.0.15",
 ]
 
 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.93"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edc52e2eb08915cb12596d29d55f0b5384f00d697a646dbd269b6ecb0fbd9d31"
+checksum = "7944172ae7e4068c533afbb984114a56c46e9ccddda550499caa222902c7f7bb"
 
 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.93"
+version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "631569015d0d8d54e6c241733f944042623ab6df7bc3be7466874b05fcdb1c5f"
+checksum = "2345488264226bf682893e25de0769f3360aac9957980ec49361b083ddaa5bc5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.11",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -454,15 +525,21 @@ dependencies = [
 
 [[package]]
 name = "ecow"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e60e2840fbfc397c7972b11a6e6bd99a0248921cc1e31f293c5f6c5ac24831da"
+checksum = "c5c5051925c54d9a42c8652313b5358a7432eed209466b443ed5220431243a14"
+
+[[package]]
+name = "either"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
 
 [[package]]
 name = "elsa"
-version = "1.8.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f74077c3c3aedb99a2683919698285596662518ea13e5eedcf8bdd43b0d0453b"
+checksum = "b5e0aca8dce8856e420195bd13b6a64de3334235ccc9214e824b86b12bf26283"
 dependencies = [
  "stable_deref_trait",
 ]
@@ -483,13 +560,13 @@ dependencies = [
 
 [[package]]
 name = "errno"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50d6a0976c999d473fe89ad888d5a284e55366d9dc9038b1ba2aa15128c4afa0"
+checksum = "4bcfec3a70f97c962c307b2d2c56e358cf1d00b558d74262b5f929ee8cc7e73a"
 dependencies = [
  "errno-dragonfly",
  "libc",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -513,15 +590,24 @@ dependencies = [
 ]
 
 [[package]]
-name = "filetime"
-version = "0.2.20"
+name = "fdeflate"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a3de6e8d11b22ff9edc6d916f890800597d60f8b2da1caf2955c274638d6412"
+checksum = "d329bdeac514ee06249dabc27877490f17f5d371ec693360768b838e19f3ae10"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "filetime"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cbc844cecaee9d4443931972e1289c8ff485cb4cc2767cb03ca139ed6885153"
 dependencies = [
  "cfg-if",
  "libc",
  "redox_syscall",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -575,6 +661,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "funty"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
+
 [[package]]
 name = "getopts"
 version = "0.2.21"
@@ -586,9 +678,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
+checksum = "c85e1d9ab2eadba7e5040d4e09cbd6d072b76a557ad64e797c2cb9d4da21d7e4"
 dependencies = [
  "cfg-if",
  "libc",
@@ -605,6 +697,22 @@ dependencies = [
  "weezl",
 ]
 
+[[package]]
+name = "gif"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80792593675e051cf94a4b111980da2ba60d4a83e43e0048c5693baab3977045"
+dependencies = [
+ "color_quant",
+ "weezl",
+]
+
+[[package]]
+name = "glob"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2fabcfbdc87f4758337ca535fb41a6d701b65693ce38287d856d1674551ec9b"
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -638,6 +746,24 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.3.1"
@@ -660,16 +786,16 @@ dependencies = [
 
 [[package]]
 name = "iana-time-zone"
-version = "0.1.53"
+version = "0.1.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64c122667b287044802d6ce17ee2ddf13207ed924c712de9a66a5814d5b64765"
+checksum = "0722cd7114b7de04316e7ea5456a0bbb20e4adb46fd27a3697adb812cff0f37c"
 dependencies = [
  "android_system_properties",
  "core-foundation-sys",
  "iana-time-zone-haiku",
  "js-sys",
  "wasm-bindgen",
- "winapi",
+ "windows",
 ]
 
 [[package]]
@@ -700,14 +826,14 @@ checksum = "cb56e1aa765b4b4f3aadfab769793b7087bb03a4ea4920644a6d238e2df5b9ed"
 
 [[package]]
 name = "image"
-version = "0.24.5"
+version = "0.24.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69b7ea949b537b0fd0af141fff8c77690f2ce96f4f41f042ccb6c69c6c965945"
+checksum = "527909aa81e20ac3a44803521443a765550f09b5130c2c2fa1ea59c2f8f50a3a"
 dependencies = [
  "bytemuck",
  "byteorder",
  "color_quant",
- "gif",
+ "gif 0.12.0",
  "jpeg-decoder 0.3.0",
  "num-rational",
  "num-traits",
@@ -741,6 +867,7 @@ checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
 dependencies = [
  "autocfg",
  "hashbrown",
+ "rayon",
 ]
 
 [[package]]
@@ -765,25 +892,44 @@ dependencies = [
 
 [[package]]
 name = "io-lifetimes"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09270fd4fa1111bc614ed2246c7ef56239a3063d5be0d1ec3b589c505d400aeb"
+checksum = "9c66c74d2ae7e79a5a8f7ac924adbe38ee42a859c6539ad869eb51f0b52dc220"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.1",
  "libc",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "is-docker"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "928bae27f42bc99b60d9ac7334e3a21d10ad8f1835a4e12ec3ec0464765ed1b3"
+dependencies = [
+ "once_cell",
 ]
 
 [[package]]
 name = "is-terminal"
-version = "0.4.6"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "256017f749ab3117e93acb91063009e1f1bb56d03965b14c2c8df4eb02c524d8"
+checksum = "adcf93614601c8129ddf72e2d5633df827ba6551541c6d8c59520a371475be1f"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.1",
  "io-lifetimes",
  "rustix",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "is-wsl"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "173609498df190136aa7dea1a91db051746d339e18476eed5ca40521f02d7aa5"
+dependencies = [
+ "is-docker",
+ "once_cell",
 ]
 
 [[package]]
@@ -795,6 +941,15 @@ dependencies = [
  "phf",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.6"
@@ -859,9 +1014,27 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.140"
+version = "0.2.141"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99227334921fae1a979cf0bfdfcc6b3e5ce376ef57e16fb6fb3ea2ed6095f80c"
+checksum = "3304a64d199bb964be99741b7a14d26972741915b3649639149b2479bb46f4b5"
+
+[[package]]
+name = "libdeflate-sys"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb6784b6b84b67d71b4307963d456a9c7c29f9b47c658f533e598de369e34277"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "libdeflater"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8e285aa6a046fd338b2592c16bee148b2b00789138ed6b7bb56bb13d585050d"
+dependencies = [
+ "libdeflate-sys",
+]
 
 [[package]]
 name = "link-cplusplus"
@@ -880,9 +1053,9 @@ checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.3.0"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd550e73688e6d578f0ac2119e32b797a327631a42f9433e59d02e139c8df60d"
+checksum = "9b085a4f2cde5781fc4b1717f2e86c62f5cda49de7ba99a7c2eae02b61c9064c"
 
 [[package]]
 name = "lipsum"
@@ -924,6 +1097,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "memoffset"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d61c719bcfbcf5d62b3a09efa6088de8c54bc0bfcd3ea7ae39fcc186108b8de1"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "miniz_oxide"
 version = "0.5.4"
@@ -942,6 +1124,16 @@ dependencies = [
  "adler",
 ]
 
+[[package]]
+name = "miniz_oxide"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7810e0be55b428ada41041c41f32c9f1a42817901b4ccf45fa3d4b6561e74c7"
+dependencies = [
+ "adler",
+ "simd-adler32",
+]
+
 [[package]]
 name = "mio"
 version = "0.8.6"
@@ -1013,6 +1205,16 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "num_cpus"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
+dependencies = [
+ "hermit-abi 0.2.6",
+ "libc",
+]
+
 [[package]]
 name = "numerals"
 version = "0.1.4"
@@ -1027,13 +1229,44 @@ checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
 
 [[package]]
 name = "open"
-version = "4.0.1"
+version = "4.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "075c5203b3a2b698bc72c6c10b1f6263182135751d5013ea66e8a4b3d0562a43"
+checksum = "873240a4a404d44c8cd1bf394359245d466a5695771fea15a79cafbc5e5cf4d7"
 dependencies = [
+ "is-wsl",
  "pathdiff",
 ]
 
+[[package]]
+name = "os_str_bytes"
+version = "6.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ceedf44fb00f2d1984b0bc98102627ce622e083e49a5bacdb3e514fa4238e267"
+
+[[package]]
+name = "oxipng"
+version = "8.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "630638e107fb436644c300e781d3f17e1b04656138ba0d40564be4be3b06db32"
+dependencies = [
+ "bitvec",
+ "clap 3.2.23",
+ "crossbeam-channel",
+ "filetime",
+ "image",
+ "indexmap",
+ "itertools",
+ "libdeflater",
+ "log",
+ "rayon",
+ "rgb",
+ "rustc-hash",
+ "rustc_version",
+ "stderrlog",
+ "wild",
+ "zopfli",
+]
+
 [[package]]
 name = "paste"
 version = "1.0.12"
@@ -1098,14 +1331,15 @@ dependencies = [
 
 [[package]]
 name = "png"
-version = "0.17.7"
+version = "0.17.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d708eaf860a19b19ce538740d2b4bdeeb8337fa53f7738455e706623ad5c638"
+checksum = "aaeebc51f9e7d2c150d3f3bfeb667f2aa985db5ef1e3d212847bdedb488beeaa"
 dependencies = [
  "bitflags",
  "crc32fast",
+ "fdeflate",
  "flate2",
- "miniz_oxide 0.6.2",
+ "miniz_oxide 0.7.1",
 ]
 
 [[package]]
@@ -1116,9 +1350,9 @@ checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.52"
+version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d0e1ae9e836cc3beddd63db0df682593d7e2d3d891ae8c9083d2113e1744224"
+checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
 dependencies = [
  "unicode-ident",
 ]
@@ -1144,6 +1378,12 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "radium"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
+
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -1169,6 +1409,28 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 
+[[package]]
+name = "rayon"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d2df5196e37bcc87abebc0053e20787d73847bb33134a69841207dd0a47f03b"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b8f95bd6966f5c87776639160a66bd8ab9895d9d4ab01ddba9fc60661aebe8d"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-deque",
+ "crossbeam-utils",
+ "num_cpus",
+]
+
 [[package]]
 name = "rctree"
 version = "0.4.0"
@@ -1197,9 +1459,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.7.1"
+version = "1.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48aaa5748ba571fb95cd2c85c09f629215d3a6ece942baa100950af03a34f733"
+checksum = "8b1f693b24f6ac912f4893ef08244d70b6067480d2f1a46e950c9691e6749d1d"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1208,9 +1470,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.28"
+version = "0.6.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
+checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
 [[package]]
 name = "resvg"
@@ -1218,7 +1480,7 @@ version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2e702d1e8e00a3a0717b96244cba840f34f542d8f23097c8903266c4e2975658"
 dependencies = [
- "gif",
+ "gif 0.11.4",
  "jpeg-decoder 0.2.6",
  "log",
  "pico-args",
@@ -1253,6 +1515,12 @@ dependencies = [
  "xmlparser",
 ]
 
+[[package]]
+name = "rustc-hash"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
+
 [[package]]
 name = "rustc_version"
 version = "0.4.0"
@@ -1264,16 +1532,16 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.37.5"
+version = "0.37.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e78cc525325c06b4a7ff02db283472f3c042b7ff0c391f96c6d5ac6f4f91b75"
+checksum = "722529a737f5a942fdbac3a46cee213053196737c5eaa3386d52e85b786f2659"
 dependencies = [
  "bitflags",
  "errno",
  "io-lifetimes",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.45.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -1322,6 +1590,12 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
 [[package]]
 name = "scratch"
 version = "1.0.5"
@@ -1336,29 +1610,29 @@ checksum = "bebd363326d05ec3e2f532ab7660680f3b02130d780c299bca73469d521bc0ed"
 
 [[package]]
 name = "serde"
-version = "1.0.158"
+version = "1.0.160"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "771d4d9c4163ee138805e12c710dd365e4f44be8be0503cb1bb9eb989425d9c9"
+checksum = "bb2f3770c8bce3bcda7e149193a069a0f4365bda1fa5cd88e03bca26afc1216c"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.158"
+version = "1.0.160"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e801c1712f48475582b7696ac71e0ca34ebb30e09338425384269d9717c62cad"
+checksum = "291a097c63d8497e00160b166a967a4a79c64f3facdd01cbd7502231688d77df"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.11",
+ "syn 2.0.15",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.94"
+version = "1.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c533a59c9d8a93a09c6ab31f0fd5e5f4dd1b8fc9434804029839884765d04ea"
+checksum = "057d394a50403bcac12672b2b18fb387ab6d289d957dab67dd201875391e52f1"
 dependencies = [
  "itoa",
  "ryu",
@@ -1377,6 +1651,12 @@ dependencies = [
  "yaml-rust",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "238abfbb77c1915110ad968465608b68e869e0772622c9656714e73e5a1a522f"
+
 [[package]]
 name = "simplecss"
 version = "0.2.1"
@@ -1404,6 +1684,18 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
 
+[[package]]
+name = "stderrlog"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69a26bbf6de627d389164afa9783739b56746c6c72c4ed16539f4ff54170327b"
+dependencies = [
+ "atty",
+ "log",
+ "termcolor",
+ "thread_local",
+]
+
 [[package]]
 name = "strsim"
 version = "0.10.0"
@@ -1472,9 +1764,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.11"
+version = "2.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21e3787bb71465627110e7d87ed4faaa36c1f61042ee67badb9e2ef173accc40"
+checksum = "a34fcf3e8b60f57e6a14301a2e916d323af98b0ea63c599441eec8558660c822"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1503,14 +1795,26 @@ dependencies = [
 ]
 
 [[package]]
-name = "termcolor"
-version = "1.2.0"
+name = "tap"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
+checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
+
+[[package]]
+name = "termcolor"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
 dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"
+
 [[package]]
 name = "thin-vec"
 version = "0.2.12"
@@ -1534,7 +1838,17 @@ checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.11",
+ "syn 2.0.15",
+]
+
+[[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]]
@@ -1642,7 +1956,7 @@ name = "typst-cli"
 version = "0.2.0"
 dependencies = [
  "chrono",
- "clap",
+ "clap 4.2.4",
  "clap_complete",
  "clap_mangen",
  "codespan-reporting",
@@ -1727,6 +2041,7 @@ dependencies = [
  "elsa",
  "iai",
  "once_cell",
+ "oxipng",
  "tiny-skia",
  "ttf-parser 0.17.1",
  "typst",
@@ -1974,6 +2289,15 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9193164d4de03a926d909d3bc7c30543cecb35400c02114792c2cae20d5e2dbb"
 
+[[package]]
+name = "wild"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05b116685a6be0c52f5a103334cbff26db643826c7b3735fc0a3ba9871310a74"
+dependencies = [
+ "glob",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -2005,19 +2329,28 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+dependencies = [
+ "windows-targets 0.48.0",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.42.2",
+ "windows_aarch64_msvc 0.42.2",
+ "windows_i686_gnu 0.42.2",
+ "windows_i686_msvc 0.42.2",
+ "windows_x86_64_gnu 0.42.2",
+ "windows_x86_64_gnullvm 0.42.2",
+ "windows_x86_64_msvc 0.42.2",
 ]
 
 [[package]]
@@ -2026,7 +2359,16 @@ version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.42.2",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets 0.48.0",
 ]
 
 [[package]]
@@ -2035,13 +2377,28 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.42.2",
+ "windows_aarch64_msvc 0.42.2",
+ "windows_i686_gnu 0.42.2",
+ "windows_i686_msvc 0.42.2",
+ "windows_x86_64_gnu 0.42.2",
+ "windows_x86_64_gnullvm 0.42.2",
+ "windows_x86_64_msvc 0.42.2",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
+dependencies = [
+ "windows_aarch64_gnullvm 0.48.0",
+ "windows_aarch64_msvc 0.48.0",
+ "windows_i686_gnu 0.48.0",
+ "windows_i686_msvc 0.48.0",
+ "windows_x86_64_gnu 0.48.0",
+ "windows_x86_64_gnullvm 0.48.0",
+ "windows_x86_64_msvc 0.48.0",
 ]
 
 [[package]]
@@ -2050,42 +2407,93 @@ version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
+[[package]]
+name = "wyz"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
+dependencies = [
+ "tap",
+]
+
 [[package]]
 name = "xi-unicode"
 version = "0.3.0"
@@ -2122,3 +2530,16 @@ checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
 dependencies = [
  "linked-hash-map",
 ]
+
+[[package]]
+name = "zopfli"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a5b2bed49d3f0af28729a2338ee8c3a48eba2133a78ebc560779be161ebaaad8"
+dependencies = [
+ "byteorder",
+ "crc32fast",
+ "log",
+ "simd-adler32",
+ "typed-arena",
+]
diff --git a/tests/Cargo.toml b/tests/Cargo.toml
index 7ab3ef908..ae4c3acb0 100644
--- a/tests/Cargo.toml
+++ b/tests/Cargo.toml
@@ -12,6 +12,7 @@ comemo = "0.2.2"
 elsa = "1.7"
 iai = { git = "https://github.com/reknih/iai" }
 once_cell = "1"
+oxipng = "8.0.0"
 tiny-skia = "0.6.2"
 ttf-parser = "0.17"
 unscanny = "0.1"
diff --git a/tests/README.md b/tests/README.md
index 1da8a9c6a..627c4caf0 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -50,18 +50,19 @@ making changes.
 testit --pdf
 ```
 
-## Creating new tests
-To keep things small, please optimize reference images before committing them.
-When you use the approve button from the Test Helper (see the `tools` folder)
-this happens automatically if you have `oxipng` installed.
+## Update expected images
+If you created a new test or fixed a bug in an existing test, you need to update
+the reference image used for comparison. For this, you can use the
+`UPDATE_EXPECT` environment varariable or the `--update` flag:
 ```bash
-# One image
-oxipng -o max path/to/image.png
-
-# All images
-oxipng -r -o max tests/ref
+testit mytest --update
 ```
 
+If you use the VS Code test helper extension (see the `tools` folder), you can
+alternatively use the checkmark button to update the reference image. In that
+case you should also install `oxipng` on your system so that the test helper
+can optimize the reference images.
+
 ## Making an alias
 If you want to have a quicker way to run the tests, consider adding a shortcut
 to your shell profile so that you can simply write something like:
diff --git a/tests/src/tests.rs b/tests/src/tests.rs
index 46bf343c4..da07c6286 100644
--- a/tests/src/tests.rs
+++ b/tests/src/tests.rs
@@ -11,6 +11,7 @@ use std::path::{Path, PathBuf};
 use comemo::{Prehashed, Track};
 use elsa::FrozenVec;
 use once_cell::unsync::OnceCell;
+use oxipng::{InFile, Options, OutFile};
 use tiny_skia as sk;
 use typst::diag::{bail, FileError, FileResult};
 use typst::doc::{Document, Frame, FrameItem, Meta};
@@ -77,14 +78,27 @@ fn main() {
         let pdf_path =
             args.pdf.then(|| Path::new(PDF_DIR).join(path).with_extension("pdf"));
 
-        ok += test(&mut world, &src_path, &png_path, &ref_path, pdf_path.as_deref())
-            as usize;
+        ok += test(
+            &mut world,
+            &src_path,
+            &png_path,
+            &ref_path,
+            pdf_path.as_deref(),
+            args.update,
+        ) as usize;
     }
 
     if len > 1 {
         println!("{ok} / {len} tests passed.");
     }
 
+    if ok != len {
+        println!(
+            "Set the UPDATE_EXPECT environment variable or pass the \
+             --update flag to update the reference image(s)."
+        );
+    }
+
     if ok < len {
         std::process::exit(1);
     }
@@ -95,6 +109,7 @@ struct Args {
     filter: Vec<String>,
     exact: bool,
     pdf: bool,
+    update: bool,
     print: PrintConfig,
 }
 
@@ -111,6 +126,7 @@ impl Args {
         let mut filter = Vec::new();
         let mut exact = false;
         let mut pdf = false;
+        let mut update = env::var_os("UPDATE_EXPECT").is_some();
         let mut print = PrintConfig::default();
 
         for arg in args {
@@ -121,6 +137,8 @@ impl Args {
                 "--exact" => exact = true,
                 // Generate PDFs.
                 "--pdf" => pdf = true,
+                // Update the reference images.
+                "--update" => update = true,
                 // Debug print the syntax trees.
                 "--syntax" => print.syntax = true,
                 // Debug print the model.
@@ -132,7 +150,7 @@ impl Args {
             }
         }
 
-        Self { filter, exact, pdf, print }
+        Self { filter, exact, pdf, update, print }
     }
 
     fn matches(&self, path: &Path) -> bool {
@@ -339,6 +357,7 @@ fn test(
     png_path: &Path,
     ref_path: &Path,
     pdf_path: Option<&Path>,
+    update: bool,
 ) -> bool {
     let name = src_path.strip_prefix(TYP_DIR).unwrap_or(src_path);
     println!("Testing {}", name.display());
@@ -346,6 +365,7 @@ fn test(
     let text = fs::read_to_string(src_path).unwrap();
 
     let mut ok = true;
+    let mut updated = false;
     let mut frames = vec![];
     let mut line = 0;
     let mut compare_ref = true;
@@ -404,16 +424,26 @@ fn test(
                     .zip(ref_pixmap.data())
                     .any(|(&a, &b)| a.abs_diff(b) > 2)
             {
-                println!("  Does not match reference image. ❌");
-                ok = false;
+                if update {
+                    update_image(png_path, ref_path);
+                    updated = true;
+                } else {
+                    println!("  Does not match reference image. ❌");
+                    ok = false;
+                }
             }
         } else if !document.pages.is_empty() {
-            println!("  Failed to open reference image. ❌");
-            ok = false;
+            if update {
+                update_image(png_path, ref_path);
+                updated = true;
+            } else {
+                println!("  Failed to open reference image. ❌");
+                ok = false;
+            }
         }
     }
 
-    if ok {
+    if ok && !updated {
         if world.print == PrintConfig::default() {
             print!("\x1b[1A");
         }
@@ -423,6 +453,16 @@ fn test(
     ok
 }
 
+fn update_image(png_path: &Path, ref_path: &Path) {
+    println!("  Updated reference image. ✔");
+    oxipng::optimize(
+        &InFile::Path(png_path.to_owned()),
+        &OutFile::Path(Some(ref_path.to_owned())),
+        &Options::max_compression(),
+    )
+    .unwrap();
+}
+
 fn test_part(
     world: &mut TestWorld,
     src_path: &Path,
diff --git a/tools/test-helper/README.md b/tools/test-helper/README.md
index d3092d0d7..45e0f6e2b 100644
--- a/tools/test-helper/README.md
+++ b/tools/test-helper/README.md
@@ -7,5 +7,8 @@ the `tests` folder.
 - Open: Opens the output and reference images of a test to the side.
 - Refresh: Refreshes the preview.
 - Rerun: Re-runs the test.
-- Approve: Copies the output into the reference folder and optimizes
+- Update: Copies the output into the reference folder and optimizes
   it with `oxipng`.
+
+For the test helper to work correctly, you also need to install `oxipng`, for
+example with `cargo install oxipng`.
diff --git a/tools/test-helper/extension.js b/tools/test-helper/extension.js
index a745916a5..4682505c7 100644
--- a/tools/test-helper/extension.js
+++ b/tools/test-helper/extension.js
@@ -51,7 +51,7 @@ function activate(context) {
         )
     })
 
-    const approveCmd = vscode.commands.registerCommand("ShortcutMenuBar.testApprove", () => {
+    const updateCmd = vscode.commands.registerCommand("ShortcutMenuBar.testUpdate", () => {
         const uri = vscode.window.activeTextEditor.document.uri
         const { pngPath, refPath } = getPaths(uri)
 
@@ -66,7 +66,7 @@ function activate(context) {
     context.subscriptions.push(openCmd)
     context.subscriptions.push(refreshCmd)
     context.subscriptions.push(rerunCmd)
-    context.subscriptions.push(approveCmd)
+    context.subscriptions.push(updateCmd)
 }
 
 function getPaths(uri) {
diff --git a/tools/test-helper/images/approve-dark.svg b/tools/test-helper/images/update-dark.svg
similarity index 100%
rename from tools/test-helper/images/approve-dark.svg
rename to tools/test-helper/images/update-dark.svg
diff --git a/tools/test-helper/images/approve-light.svg b/tools/test-helper/images/update-light.svg
similarity index 100%
rename from tools/test-helper/images/approve-light.svg
rename to tools/test-helper/images/update-light.svg
diff --git a/tools/test-helper/package.json b/tools/test-helper/package.json
index 157df0cb7..d2578ab94 100644
--- a/tools/test-helper/package.json
+++ b/tools/test-helper/package.json
@@ -1,7 +1,7 @@
 {
   "name": "typst-test-helper",
   "displayName": "Typst Test Helper",
-  "description": "Helps to run, compare and approve Typst tests.",
+  "description": "Helps to run, compare and update Typst tests.",
   "version": "0.0.1",
   "engines": {
     "vscode": "^1.53.0"
@@ -13,7 +13,7 @@
     "onCommand:ShortcutMenuBar.testOpen",
     "onCommand:ShortcutMenuBar.testRefresh",
     "onCommand:ShortcutMenuBar.testRerun",
-    "onCommand:ShortcutMenuBar.testApprove"
+    "onCommand:ShortcutMenuBar.testUpdate"
   ],
   "main": "./extension.js",
   "contributes": {
@@ -46,12 +46,12 @@
         }
       },
       {
-        "command": "ShortcutMenuBar.testApprove",
-        "title": "Approve output",
+        "command": "ShortcutMenuBar.testUpdate",
+        "title": "Update reference image",
         "category": "ShortcutMenuBar",
         "icon": {
-          "light": "images/approve-light.svg",
-          "dark": "images/approve-dark.svg"
+          "light": "images/update-light.svg",
+          "dark": "images/update-dark.svg"
         }
       }
     ],
@@ -74,7 +74,7 @@
         },
         {
           "when": "resourceExtname == .typ && resourcePath =~ /.*tests.*/",
-          "command": "ShortcutMenuBar.testApprove",
+          "command": "ShortcutMenuBar.testUpdate",
           "group": "navigation@3"
         }
       ]