diff --git a/.gitignore b/.gitignore
index 500c84509..2e1f34ade 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,6 @@
 css
-lib-cov
 testing
 .DS_Store
 /node_modules
 coverage.html
-lib-cov
 .idea
diff --git a/.npmignore b/.npmignore
index 828c3042e..57f59e0d9 100644
--- a/.npmignore
+++ b/.npmignore
@@ -21,4 +21,3 @@ test/
 graphics/
 
 coverage.html
-lib-cov
diff --git a/Makefile b/Makefile
index 5c8d535ba..524c8744e 100644
--- a/Makefile
+++ b/Makefile
@@ -19,12 +19,6 @@ TM_BUNDLE_DEST = $(shell $(DETERMINE_TEXTMATE_BUNDLE_PATH))
 test:
 	@npm test
 
-test-cov: lib-cov
-	@STYLUS_COV=1 npm run-script test-cov
-
-lib-cov: lib
-	./node_modules/.bin/jscoverage $< $@
-
 install-bundle:
 	mkdir -p "$(TM_BUNDLE_DEST)"
 	cp -fr "$(TM_BUNDLE)" "$(TM_BUNDLE_DEST)"
@@ -35,4 +29,4 @@ update-bundle:
 benchmark:
 	@node bm.js
 
-.PHONY: test install-bundle update-bundle benchmark test-cov
+.PHONY: test install-bundle update-bundle benchmark
diff --git a/index.js b/index.js
index ab58d3e7b..3dbb7ec89 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1 @@
-
-module.exports = process.env.STYLUS_COV
-  ? require('./lib-cov/stylus')
-  : require('./lib/stylus');
\ No newline at end of file
+module.exports = require('./lib/stylus');
diff --git a/package-lock.json b/package-lock.json
index 2d23e1742..256cdb86b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,12 +10,6 @@
       "integrity": "sha512-sL/cEvJWAnClXw0wHk85/2L0G6Sj8UB0Ctc1TEMbKSsmpRosqhwj9gWgFRZSrBr2f9tiXISwNhCPmlfqUqyb9Q==",
       "dev": true
     },
-    "amdefine": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true
-    },
     "ansi-colors": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
@@ -59,12 +53,6 @@
       "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
       "dev": true
     },
-    "async": {
-      "version": "0.2.10",
-      "resolved": "https://registry.npmjs.org/async/-/async-0.2.10.tgz",
-      "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E=",
-      "dev": true
-    },
     "atob": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
@@ -105,12 +93,6 @@
       "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
       "dev": true
     },
-    "camelcase": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
-      "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
-      "dev": true
-    },
     "chai": {
       "version": "4.3.6",
       "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.6.tgz",
@@ -180,12 +162,6 @@
         "wrap-ansi": "^7.0.0"
       }
     },
-    "coffee-script": {
-      "version": "1.12.7",
-      "resolved": "https://registry.npmjs.org/coffee-script/-/coffee-script-1.12.7.tgz",
-      "integrity": "sha512-fLeEhqwymYat/MpTPUjSKHVYYl0ec2mOyALEMLmzr5i1isuG+6jfI2j2d5oBO3VIzgUXgBVIcOT9uH1TFxBckw==",
-      "dev": true
-    },
     "color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -201,12 +177,6 @@
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
       "dev": true
     },
-    "commander": {
-      "version": "2.19.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
-      "integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==",
-      "dev": true
-    },
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -244,12 +214,6 @@
         }
       }
     },
-    "decamelize": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-1.2.0.tgz",
-      "integrity": "sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=",
-      "dev": true
-    },
     "decode-uri-component": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
@@ -270,12 +234,6 @@
       "integrity": "sha512-/VTCrvm5Z0JGty/BWHljh+BAiw3IK+2j87NGMu8Nwc/f48WoDAC395uomO9ZD117ZOBaHmkX1oyLvkVM/aIT3w==",
       "dev": true
     },
-    "ejs": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-1.0.0.tgz",
-      "integrity": "sha1-ycYKSKRu5FL7MqccMXuV5aofyz0=",
-      "dev": true
-    },
     "emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -460,32 +418,6 @@
         "argparse": "^2.0.1"
       }
     },
-    "jscoverage": {
-      "version": "0.6.0",
-      "resolved": "https://registry.npmjs.org/jscoverage/-/jscoverage-0.6.0.tgz",
-      "integrity": "sha1-9eE6nhN3Yzh2jB7gLhrnHVFc2sk=",
-      "dev": true,
-      "requires": {
-        "coffee-script": "*",
-        "commander": "^2.6.0",
-        "debug": "~1.0.3",
-        "ejs": "1.0.0",
-        "optimist": "^0.6.1",
-        "uglify-js": "~2.4.15",
-        "xfs": "~0.1.8"
-      },
-      "dependencies": {
-        "debug": {
-          "version": "1.0.5",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-1.0.5.tgz",
-          "integrity": "sha1-9yQSF0MPmd7EwrRz6rkiKOh0wqw=",
-          "dev": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
-        }
-      }
-    },
     "locate-path": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
@@ -522,12 +454,6 @@
         "brace-expansion": "^1.1.7"
       }
     },
-    "minimist": {
-      "version": "0.0.8",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
-      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-      "dev": true
-    },
     "mocha": {
       "version": "9.2.0",
       "resolved": "https://registry.npmjs.org/mocha/-/mocha-9.2.0.tgz",
@@ -614,12 +540,6 @@
         }
       }
     },
-    "ms": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
-      "dev": true
-    },
     "nanoid": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.2.0.tgz",
@@ -640,16 +560,6 @@
         "wrappy": "1"
       }
     },
-    "optimist": {
-      "version": "0.6.1",
-      "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.6.1.tgz",
-      "integrity": "sha1-2j6nRob6IaGaERwybpDrFaAZZoY=",
-      "dev": true,
-      "requires": {
-        "minimist": "~0.0.1",
-        "wordwrap": "~0.0.2"
-      }
-    },
     "p-limit": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
@@ -804,35 +714,6 @@
       "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
       "dev": true
     },
-    "uglify-js": {
-      "version": "2.4.24",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.4.24.tgz",
-      "integrity": "sha1-+tV1XB4Vd2WLsG/5q25UjJW+vW4=",
-      "dev": true,
-      "requires": {
-        "async": "~0.2.6",
-        "source-map": "0.1.34",
-        "uglify-to-browserify": "~1.0.0",
-        "yargs": "~3.5.4"
-      },
-      "dependencies": {
-        "source-map": {
-          "version": "0.1.34",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.34.tgz",
-          "integrity": "sha1-p8/omux7FoLDsZjQrPtH19CQVms=",
-          "dev": true,
-          "requires": {
-            "amdefine": ">=0.0.4"
-          }
-        }
-      }
-    },
-    "uglify-to-browserify": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz",
-      "integrity": "sha1-bgkk1r2mta/jSeOabWMoUKD4grc=",
-      "dev": true
-    },
     "which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -842,18 +723,6 @@
         "isexe": "^2.0.0"
       }
     },
-    "window-size": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
-      "integrity": "sha1-VDjNLqk7IC76Ohn+iIeu58lPnJ0=",
-      "dev": true
-    },
-    "wordwrap": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
-      "dev": true
-    },
     "workerpool": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.2.0.tgz",
@@ -876,38 +745,12 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
-    "xfs": {
-      "version": "0.1.10",
-      "resolved": "https://registry.npmjs.org/xfs/-/xfs-0.1.10.tgz",
-      "integrity": "sha1-TdL9uyraKifmxdRxy1fAleZStwM=",
-      "dev": true
-    },
     "y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
       "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
       "dev": true
     },
-    "yargs": {
-      "version": "3.5.4",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.5.4.tgz",
-      "integrity": "sha1-2K/49mXpTDS9JZvevRv68N3TU2E=",
-      "dev": true,
-      "requires": {
-        "camelcase": "^1.0.2",
-        "decamelize": "^1.0.0",
-        "window-size": "0.1.0",
-        "wordwrap": "0.0.2"
-      },
-      "dependencies": {
-        "wordwrap": {
-          "version": "0.0.2",
-          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
-          "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
-          "dev": true
-        }
-      }
-    },
     "yargs-parser": {
       "version": "20.2.4",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.4.tgz",
diff --git a/package.json b/package.json
index 039a5003f..40883e0ee 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,6 @@
   },
   "devDependencies": {
     "chai": "^4.3.6",
-    "jscoverage": "~0.6.0",
     "mocha": "^9.2.0"
   },
   "bugs": {