diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index edab929d4..b3b39ba72 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,8 +75,8 @@ jobs:
      - name: Run unit test
        run: npm run test
 
-  allow_failure_testing_for_node23:
-    name: 'Allow failure for nodejs v23 tests'
+  latest_nodejs_testing_node23:
+    name: 'Latest nodejs v23 test'
     needs: basic_node_test
     runs-on: ubuntu-latest
     steps:
diff --git a/packages/less/package-lock.json b/packages/less/package-lock.json
index d38af3f27..38b084abd 100644
--- a/packages/less/package-lock.json
+++ b/packages/less/package-lock.json
@@ -41,7 +41,7 @@
 				"html-template-tag": "^3.2.0",
 				"jit-grunt": "^0.10.0",
 				"less-plugin-autoprefix": "^1.5.1",
-				"less-plugin-clean-css": "^1.5.1",
+				"less-plugin-clean-css": "^1.6.0",
 				"minimist": "^1.2.0",
 				"mocha": "^6.2.1",
 				"mocha-teamcity-reporter": "^3.0.0",
@@ -766,15 +766,6 @@
 				"url": "https://github.com/sponsors/epoberezkin"
 			}
 		},
-		"node_modules/amdefine": {
-			"version": "1.0.1",
-			"resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-			"integrity": "sha512-S2Hw0TtNkMJhIabBwIojKL9YHO5T0n5eNqWJ7Lrlel/zDbftQpxpapi8tZs3X1HWa+u+QeydGmzzNU0m09+Rcg==",
-			"dev": true,
-			"engines": {
-				"node": ">=0.4.2"
-			}
-		},
 		"node_modules/ansi-colors": {
 			"version": "4.1.3",
 			"resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.3.tgz",
@@ -1309,43 +1300,15 @@
 			}
 		},
 		"node_modules/clean-css": {
-			"version": "3.4.28",
-			"resolved": "https://registry.npmjs.org/clean-css/-/clean-css-3.4.28.tgz",
-			"integrity": "sha512-aTWyttSdI2mYi07kWqHi24NUU9YlELFKGOAgFzZjDN1064DMAOy2FBuoyGmkKRlXkbpXd0EVHmiVkbKhKoirTw==",
-			"dev": true,
-			"dependencies": {
-				"commander": "2.8.x",
-				"source-map": "0.4.x"
-			},
-			"bin": {
-				"cleancss": "bin/cleancss"
-			},
-			"engines": {
-				"node": ">=0.10.0"
-			}
-		},
-		"node_modules/clean-css/node_modules/commander": {
-			"version": "2.8.1",
-			"resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
-			"integrity": "sha512-+pJLBFVk+9ZZdlAOB5WuIElVPPth47hILFkmGym57aq8kwxsowvByvB0DHs1vQAhyMZzdcpTtF0VDKGkSDR4ZQ==",
+			"version": "5.3.3",
+			"resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.3.tgz",
+			"integrity": "sha512-D5J+kHaVb/wKSFcyyV75uCn8fiY4sV38XJoe4CUyGQ+mOU/fMVYUdH1hJC+CJQ5uY3EnW27SbJYS4X8BiLrAFg==",
 			"dev": true,
 			"dependencies": {
-				"graceful-readlink": ">= 1.0.0"
-			},
-			"engines": {
-				"node": ">= 0.6.x"
-			}
-		},
-		"node_modules/clean-css/node_modules/source-map": {
-			"version": "0.4.4",
-			"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
-			"integrity": "sha512-Y8nIfcb1s/7DcobUz1yOO1GSp7gyL+D9zLHDehT7iRESqGSxjJ448Sg7rvfgsRJCnKLdSl11uGf0s9X80cH0/A==",
-			"dev": true,
-			"dependencies": {
-				"amdefine": ">=0.0.4"
+				"source-map": "~0.6.0"
 			},
 			"engines": {
-				"node": ">=0.8.0"
+				"node": ">= 10.0"
 			}
 		},
 		"node_modules/cli-cursor": {
@@ -2942,12 +2905,6 @@
 			"integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==",
 			"devOptional": true
 		},
-		"node_modules/graceful-readlink": {
-			"version": "1.0.1",
-			"resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
-			"integrity": "sha512-8tLu60LgxF6XpdbK8OW3FA+IfTNBn1ZHGHKF4KQbEeSkajYw5PlYJcKluntgegDPTg8UkHjpet1T82vk6TQ68w==",
-			"dev": true
-		},
 		"node_modules/growl": {
 			"version": "1.10.5",
 			"resolved": "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz",
@@ -4214,15 +4171,15 @@
 			}
 		},
 		"node_modules/less-plugin-clean-css": {
-			"version": "1.5.1",
-			"resolved": "https://registry.npmjs.org/less-plugin-clean-css/-/less-plugin-clean-css-1.5.1.tgz",
-			"integrity": "sha512-Pc68AFHAEJO3aAoRvnUTW5iAiAv6y+TQsWLTTwVNqjiDno6xCvxz1AtfQl7Y0MZSpHPalFajM1EU4RB5UVINpw==",
+			"version": "1.6.0",
+			"resolved": "https://registry.npmjs.org/less-plugin-clean-css/-/less-plugin-clean-css-1.6.0.tgz",
+			"integrity": "sha512-jwXX6WlXT57OVCXa5oBJBaJq1b4s1BOKeEEoAL2UTeEitogQWfTcBbLT/vow9pl0N0MXV8Mb4KyhTGG0YbEKyQ==",
 			"dev": true,
 			"dependencies": {
-				"clean-css": "^3.0.1"
+				"clean-css": "5.3.3"
 			},
 			"engines": {
-				"node": ">=0.4.2"
+				"node": ">=0.10"
 			}
 		},
 		"node_modules/levn": {
@@ -8389,12 +8346,6 @@
 				"uri-js": "^4.2.2"
 			}
 		},
-		"amdefine": {
-			"version": "1.0.1",
-			"resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-			"integrity": "sha512-S2Hw0TtNkMJhIabBwIojKL9YHO5T0n5eNqWJ7Lrlel/zDbftQpxpapi8tZs3X1HWa+u+QeydGmzzNU0m09+Rcg==",
-			"dev": true
-		},
 		"ansi-colors": {
 			"version": "4.1.3",
 			"resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.3.tgz",
@@ -8816,33 +8767,12 @@
 			"dev": true
 		},
 		"clean-css": {
-			"version": "3.4.28",
-			"resolved": "https://registry.npmjs.org/clean-css/-/clean-css-3.4.28.tgz",
-			"integrity": "sha512-aTWyttSdI2mYi07kWqHi24NUU9YlELFKGOAgFzZjDN1064DMAOy2FBuoyGmkKRlXkbpXd0EVHmiVkbKhKoirTw==",
+			"version": "5.3.3",
+			"resolved": "https://registry.npmjs.org/clean-css/-/clean-css-5.3.3.tgz",
+			"integrity": "sha512-D5J+kHaVb/wKSFcyyV75uCn8fiY4sV38XJoe4CUyGQ+mOU/fMVYUdH1hJC+CJQ5uY3EnW27SbJYS4X8BiLrAFg==",
 			"dev": true,
 			"requires": {
-				"commander": "2.8.x",
-				"source-map": "0.4.x"
-			},
-			"dependencies": {
-				"commander": {
-					"version": "2.8.1",
-					"resolved": "https://registry.npmjs.org/commander/-/commander-2.8.1.tgz",
-					"integrity": "sha512-+pJLBFVk+9ZZdlAOB5WuIElVPPth47hILFkmGym57aq8kwxsowvByvB0DHs1vQAhyMZzdcpTtF0VDKGkSDR4ZQ==",
-					"dev": true,
-					"requires": {
-						"graceful-readlink": ">= 1.0.0"
-					}
-				},
-				"source-map": {
-					"version": "0.4.4",
-					"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.4.4.tgz",
-					"integrity": "sha512-Y8nIfcb1s/7DcobUz1yOO1GSp7gyL+D9zLHDehT7iRESqGSxjJ448Sg7rvfgsRJCnKLdSl11uGf0s9X80cH0/A==",
-					"dev": true,
-					"requires": {
-						"amdefine": ">=0.0.4"
-					}
-				}
+				"source-map": "~0.6.0"
 			}
 		},
 		"cli-cursor": {
@@ -10090,12 +10020,6 @@
 			"integrity": "sha512-RbJ5/jmFcNNCcDV5o9eTnBLJ/HszWV0P73bc+Ff4nS/rJj+YaS6IGyiOL0VoBYX+l1Wrl3k63h/KrH+nhJ0XvQ==",
 			"devOptional": true
 		},
-		"graceful-readlink": {
-			"version": "1.0.1",
-			"resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
-			"integrity": "sha512-8tLu60LgxF6XpdbK8OW3FA+IfTNBn1ZHGHKF4KQbEeSkajYw5PlYJcKluntgegDPTg8UkHjpet1T82vk6TQ68w==",
-			"dev": true
-		},
 		"growl": {
 			"version": "1.10.5",
 			"resolved": "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz",
@@ -11029,12 +10953,12 @@
 			}
 		},
 		"less-plugin-clean-css": {
-			"version": "1.5.1",
-			"resolved": "https://registry.npmjs.org/less-plugin-clean-css/-/less-plugin-clean-css-1.5.1.tgz",
-			"integrity": "sha512-Pc68AFHAEJO3aAoRvnUTW5iAiAv6y+TQsWLTTwVNqjiDno6xCvxz1AtfQl7Y0MZSpHPalFajM1EU4RB5UVINpw==",
+			"version": "1.6.0",
+			"resolved": "https://registry.npmjs.org/less-plugin-clean-css/-/less-plugin-clean-css-1.6.0.tgz",
+			"integrity": "sha512-jwXX6WlXT57OVCXa5oBJBaJq1b4s1BOKeEEoAL2UTeEitogQWfTcBbLT/vow9pl0N0MXV8Mb4KyhTGG0YbEKyQ==",
 			"dev": true,
 			"requires": {
-				"clean-css": "^3.0.1"
+				"clean-css": "5.3.3"
 			}
 		},
 		"levn": {
diff --git a/packages/less/package.json b/packages/less/package.json
index 24bb10e0b..7d4785eac 100644
--- a/packages/less/package.json
+++ b/packages/less/package.json
@@ -82,7 +82,7 @@
 		"html-template-tag": "^3.2.0",
 		"jit-grunt": "^0.10.0",
 		"less-plugin-autoprefix": "^1.5.1",
-		"less-plugin-clean-css": "^1.5.1",
+		"less-plugin-clean-css": "^1.6.0",
 		"minimist": "^1.2.0",
 		"mocha": "^6.2.1",
 		"playwright": "^1.49.0",