diff --git a/.c8rc.json b/.c8rc.json
index e7b602ec15b..cf7d1472ca5 100644
--- a/.c8rc.json
+++ b/.c8rc.json
@@ -1,5 +1,5 @@
 {
-    "reporter": ["lcovonly", "cobertura"],
+    "reporter": ["lcovonly", "cobertura", "v8", "codecov"],
     "src": "src",
     "include": ["src/**", "built/local/**"],
     "exclude": ["**/node_modules/**"],
diff --git a/.github/codecov.yml b/.github/codecov.yml
new file mode 100644
index 00000000000..fec29d63b48
--- /dev/null
+++ b/.github/codecov.yml
@@ -0,0 +1,14 @@
+comment: false
+
+coverage:
+  precision: 5
+  status:
+    patch:
+      default:
+        informational: true
+    project:
+      default:
+        informational: true
+
+github_checks:
+  annotations: false
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e87db78e03e..053c61e4be9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,6 +69,38 @@ jobs:
           git add tests/baselines/reference
           git diff --staged --exit-code
 
+  coverage:
+    runs-on:
+      - 'self-hosted'
+      - '1ES.Pool=TypeScript-1ES-GitHub-Large'
+      - '1ES.ImageOverride=ubuntu-22.04'
+
+    permissions:
+      id-token: write
+      contents: read
+
+    steps:
+      - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
+      - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
+        with:
+          node-version: '*'
+          check-latest: true
+      - run: npm ci
+
+      - name: Run tests with coverage
+        run: npm test -- --no-lint --coverage
+
+      - name: Upload coverage artifact
+        uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
+        with:
+          name: coverage
+          path: coverage
+
+      - uses: codecov/codecov-action@e28ff129e5465c2c0dcc6f003fc735cb6ae0c673 # v4.5.0
+        with:
+          use_oidc: true
+          file: ./coverage/codecov.json
+
   lint:
     runs-on: ubuntu-latest
 
diff --git a/knip.jsonc b/knip.jsonc
index 9bca724db2a..9865bc39c16 100644
--- a/knip.jsonc
+++ b/knip.jsonc
@@ -28,7 +28,7 @@
     "ignore": [
         "scripts/failed-tests.d.cts"
     ],
-    "ignoreDependencies": ["c8", "eslint-formatter-autolinkable-stylish", "mocha-fivemat-progress-reporter"],
+    "ignoreDependencies": ["c8", "eslint-formatter-autolinkable-stylish", "mocha-fivemat-progress-reporter", "monocart-coverage-reports"],
     "ignoreExportsUsedInFile": {
         "enum": true,
         "interface": true,
diff --git a/package-lock.json b/package-lock.json
index c0fcda95f0c..e6d5a8376d2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -46,6 +46,7 @@
                 "minimist": "^1.2.8",
                 "mocha": "^10.5.2",
                 "mocha-fivemat-progress-reporter": "^0.1.0",
+                "monocart-coverage-reports": "^2.9.2",
                 "ms": "^2.1.3",
                 "node-fetch": "^3.3.2",
                 "playwright": "^1.45.0",
@@ -776,9 +777,9 @@
             }
         },
         "node_modules/@jridgewell/sourcemap-codec": {
-            "version": "1.4.15",
-            "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.15.tgz",
-            "integrity": "sha512-eF2rxCRulEKXHTRiDrDy6erMYWqNw4LPdQ8UQA4huuxaQsVeRPFl2oM8oDGxMFhJUWZf9McpLtJasDDZb/Bpeg==",
+            "version": "1.5.0",
+            "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+            "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
             "dev": true
         },
         "node_modules/@jridgewell/trace-mapping": {
@@ -1258,9 +1259,9 @@
             "dev": true
         },
         "node_modules/acorn": {
-            "version": "8.12.0",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.0.tgz",
-            "integrity": "sha512-RTvkC4w+KNXrM39/lWCUaG0IbRkWdCv7W/IOW9oU6SawyxulvkQy5HQPVTKxEjczcUvapcrw3cFx/60VN/NRNw==",
+            "version": "8.12.1",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.1.tgz",
+            "integrity": "sha512-tcpGyI9zbizT9JbV6oYE477V6mTlXvvi0T0G3SNIYE2apm/G5huBa1+K89VGeovbg+jycCrfhl3ADxErOuO6Jg==",
             "dev": true,
             "bin": {
                 "acorn": "bin/acorn"
@@ -1278,6 +1279,30 @@
                 "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
             }
         },
+        "node_modules/acorn-loose": {
+            "version": "8.4.0",
+            "resolved": "https://registry.npmjs.org/acorn-loose/-/acorn-loose-8.4.0.tgz",
+            "integrity": "sha512-M0EUka6rb+QC4l9Z3T0nJEzNOO7JcoJlYMrBlyBCiFSXRyxjLKayd4TbQs2FDRWQU1h9FR7QVNHt+PEaoNL5rQ==",
+            "dev": true,
+            "dependencies": {
+                "acorn": "^8.11.0"
+            },
+            "engines": {
+                "node": ">=0.4.0"
+            }
+        },
+        "node_modules/acorn-walk": {
+            "version": "8.3.3",
+            "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.3.3.tgz",
+            "integrity": "sha512-MxXdReSRhGO7VlFe1bRG/oI7/mdLV9B9JJT0N8vZOhF7gFRR5l3M8W9G8JxmKV+JC5mGqJ0QvqfSOLsCPa4nUw==",
+            "dev": true,
+            "dependencies": {
+                "acorn": "^8.11.0"
+            },
+            "engines": {
+                "node": ">=0.4.0"
+            }
+        },
         "node_modules/aggregate-error": {
             "version": "3.1.0",
             "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.1.0.tgz",
@@ -1788,6 +1813,12 @@
             "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
             "dev": true
         },
+        "node_modules/console-grid": {
+            "version": "2.2.2",
+            "resolved": "https://registry.npmjs.org/console-grid/-/console-grid-2.2.2.tgz",
+            "integrity": "sha512-ohlgXexdDTKLNsZz7DSJuCAwmRc8omSS61txOk39W3NOthgKGr1a1jJpZ5BCQe4PlrwMw01OvPQ1Bl3G7Y/uFg==",
+            "dev": true
+        },
         "node_modules/convert-source-map": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
@@ -1943,6 +1974,15 @@
                 "node": ">=0.3.1"
             }
         },
+        "node_modules/diff-sequences": {
+            "version": "29.6.3",
+            "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-29.6.3.tgz",
+            "integrity": "sha512-EjePK1srD3P08o2j4f0ExnylqRs5B9tJjcp9t1krH2qRi8CCdsYfwe9JgSLurFBWwq4uOlipzfk5fHNvwFKr8Q==",
+            "dev": true,
+            "engines": {
+                "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
+            }
+        },
         "node_modules/dir-glob": {
             "version": "3.0.1",
             "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
@@ -2004,6 +2044,12 @@
                 "wcwidth": "^1.0.1"
             }
         },
+        "node_modules/eight-colors": {
+            "version": "1.3.0",
+            "resolved": "https://registry.npmjs.org/eight-colors/-/eight-colors-1.3.0.tgz",
+            "integrity": "sha512-hVoK898cR71ADj7L1LZWaECLaSkzzPtqGXIaKv4K6Pzb72QgjLVsQaNI+ELDQQshzFvgp5xTPkaYkPGqw3YR+g==",
+            "dev": true
+        },
         "node_modules/emoji-regex": {
             "version": "9.2.2",
             "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-9.2.2.tgz",
@@ -3196,6 +3242,12 @@
                 "node": "14 || >=16.14"
             }
         },
+        "node_modules/lz-utils": {
+            "version": "2.0.2",
+            "resolved": "https://registry.npmjs.org/lz-utils/-/lz-utils-2.0.2.tgz",
+            "integrity": "sha512-i1PJN4hNEevkrvLMqNWCCac1BcB5SRaghywG7HVzWOyVkFOasLCG19ND1sY1F/ZEsM6SnGtoXyBWnmfqOM5r6g==",
+            "dev": true
+        },
         "node_modules/make-dir": {
             "version": "4.0.0",
             "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
@@ -3467,6 +3519,78 @@
                 "node": ">=10"
             }
         },
+        "node_modules/monocart-code-viewer": {
+            "version": "1.1.4",
+            "resolved": "https://registry.npmjs.org/monocart-code-viewer/-/monocart-code-viewer-1.1.4.tgz",
+            "integrity": "sha512-ehSe1lBG7D1VDVLjTkHV63J3zAgzyhlC9OaxOri7D0X4L5/EcZUOG5TEoMmYErL+YGSOQXghU9kSSAelwNnp1Q==",
+            "dev": true
+        },
+        "node_modules/monocart-coverage-reports": {
+            "version": "2.9.2",
+            "resolved": "https://registry.npmjs.org/monocart-coverage-reports/-/monocart-coverage-reports-2.9.2.tgz",
+            "integrity": "sha512-kczj6csD/OYJN4/qsRq5E8bMytHHw+Mi8InOnGH/zwszwsI92X4rbH9SJgmKm10wqzbOPwfxcHezLelK3CFWrA==",
+            "dev": true,
+            "dependencies": {
+                "@bcoe/v8-coverage": "^0.2.3",
+                "@jridgewell/sourcemap-codec": "^1.5.0",
+                "acorn": "^8.12.1",
+                "acorn-loose": "^8.4.0",
+                "acorn-walk": "^8.3.3",
+                "commander": "^12.1.0",
+                "console-grid": "^2.2.2",
+                "diff-sequences": "^29.6.3",
+                "eight-colors": "^1.3.0",
+                "foreground-child": "^3.2.1",
+                "istanbul-lib-coverage": "^3.2.2",
+                "istanbul-lib-report": "^3.0.1",
+                "istanbul-reports": "^3.1.7",
+                "lz-utils": "^2.0.2",
+                "minimatch": "^10.0.1",
+                "monocart-code-viewer": "^1.1.4",
+                "monocart-formatter": "^3.0.0",
+                "monocart-locator": "^1.0.2",
+                "turbogrid": "^3.2.0"
+            },
+            "bin": {
+                "mcr": "lib/cli.js"
+            }
+        },
+        "node_modules/monocart-coverage-reports/node_modules/commander": {
+            "version": "12.1.0",
+            "resolved": "https://registry.npmjs.org/commander/-/commander-12.1.0.tgz",
+            "integrity": "sha512-Vw8qHK3bZM9y/P10u3Vib8o/DdkvA2OtPtZvD871QKjy74Wj1WSKFILMPRPSdUSx5RFK1arlJzEtA4PkFgnbuA==",
+            "dev": true,
+            "engines": {
+                "node": ">=18"
+            }
+        },
+        "node_modules/monocart-coverage-reports/node_modules/minimatch": {
+            "version": "10.0.1",
+            "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.0.1.tgz",
+            "integrity": "sha512-ethXTt3SGGR+95gudmqJ1eNhRO7eGEGIgYA9vnPatK4/etz2MEVDno5GMCibdMTuBMyElzIlgxMna3K94XDIDQ==",
+            "dev": true,
+            "dependencies": {
+                "brace-expansion": "^2.0.1"
+            },
+            "engines": {
+                "node": "20 || >=22"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/isaacs"
+            }
+        },
+        "node_modules/monocart-formatter": {
+            "version": "3.0.0",
+            "resolved": "https://registry.npmjs.org/monocart-formatter/-/monocart-formatter-3.0.0.tgz",
+            "integrity": "sha512-91OQpUb/9iDqvrblUv6ki11Jxi1d3Fp5u2jfVAPl3UdNp9TM+iBleLzXntUS51W0o+zoya3CJjZZ01z2XWn25g==",
+            "dev": true
+        },
+        "node_modules/monocart-locator": {
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/monocart-locator/-/monocart-locator-1.0.2.tgz",
+            "integrity": "sha512-v8W5hJLcWMIxLCcSi/MHh+VeefI+ycFmGz23Froer9QzWjrbg4J3gFJBuI/T1VLNoYxF47bVPPxq8ZlNX4gVCw==",
+            "dev": true
+        },
         "node_modules/ms": {
             "version": "2.1.3",
             "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -4389,6 +4513,12 @@
                 "node": ">=0.6.11 <=0.7.0 || >=0.7.3"
             }
         },
+        "node_modules/turbogrid": {
+            "version": "3.2.0",
+            "resolved": "https://registry.npmjs.org/turbogrid/-/turbogrid-3.2.0.tgz",
+            "integrity": "sha512-c+2qrCGWzoYpLlxtHgRJ4V5dDRE9fUT7D9maxtdBCqJ0NzCdY+x7xF3/F6cG/+n3VIzKfIS+p9Z/0YMQPf6k/Q==",
+            "dev": true
+        },
         "node_modules/type-check": {
             "version": "0.4.0",
             "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -5203,9 +5333,9 @@
             "dev": true
         },
         "@jridgewell/sourcemap-codec": {
-            "version": "1.4.15",
-            "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.15.tgz",
-            "integrity": "sha512-eF2rxCRulEKXHTRiDrDy6erMYWqNw4LPdQ8UQA4huuxaQsVeRPFl2oM8oDGxMFhJUWZf9McpLtJasDDZb/Bpeg==",
+            "version": "1.5.0",
+            "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
+            "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
             "dev": true
         },
         "@jridgewell/trace-mapping": {
@@ -5540,9 +5670,9 @@
             "dev": true
         },
         "acorn": {
-            "version": "8.12.0",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.0.tgz",
-            "integrity": "sha512-RTvkC4w+KNXrM39/lWCUaG0IbRkWdCv7W/IOW9oU6SawyxulvkQy5HQPVTKxEjczcUvapcrw3cFx/60VN/NRNw==",
+            "version": "8.12.1",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.12.1.tgz",
+            "integrity": "sha512-tcpGyI9zbizT9JbV6oYE477V6mTlXvvi0T0G3SNIYE2apm/G5huBa1+K89VGeovbg+jycCrfhl3ADxErOuO6Jg==",
             "dev": true
         },
         "acorn-jsx": {
@@ -5552,6 +5682,24 @@
             "dev": true,
             "requires": {}
         },
+        "acorn-loose": {
+            "version": "8.4.0",
+            "resolved": "https://registry.npmjs.org/acorn-loose/-/acorn-loose-8.4.0.tgz",
+            "integrity": "sha512-M0EUka6rb+QC4l9Z3T0nJEzNOO7JcoJlYMrBlyBCiFSXRyxjLKayd4TbQs2FDRWQU1h9FR7QVNHt+PEaoNL5rQ==",
+            "dev": true,
+            "requires": {
+                "acorn": "^8.11.0"
+            }
+        },
+        "acorn-walk": {
+            "version": "8.3.3",
+            "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-8.3.3.tgz",
+            "integrity": "sha512-MxXdReSRhGO7VlFe1bRG/oI7/mdLV9B9JJT0N8vZOhF7gFRR5l3M8W9G8JxmKV+JC5mGqJ0QvqfSOLsCPa4nUw==",
+            "dev": true,
+            "requires": {
+                "acorn": "^8.11.0"
+            }
+        },
         "aggregate-error": {
             "version": "3.1.0",
             "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.1.0.tgz",
@@ -5932,6 +6080,12 @@
             "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
             "dev": true
         },
+        "console-grid": {
+            "version": "2.2.2",
+            "resolved": "https://registry.npmjs.org/console-grid/-/console-grid-2.2.2.tgz",
+            "integrity": "sha512-ohlgXexdDTKLNsZz7DSJuCAwmRc8omSS61txOk39W3NOthgKGr1a1jJpZ5BCQe4PlrwMw01OvPQ1Bl3G7Y/uFg==",
+            "dev": true
+        },
         "convert-source-map": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
@@ -6047,6 +6201,12 @@
             "integrity": "sha512-uIFDxqpRZGZ6ThOk84hEfqWoHx2devRFvpTZcTHur85vImfaxUbTW9Ryh4CpCuDnToOP1CEtXKIgytHBPVff5A==",
             "dev": true
         },
+        "diff-sequences": {
+            "version": "29.6.3",
+            "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-29.6.3.tgz",
+            "integrity": "sha512-EjePK1srD3P08o2j4f0ExnylqRs5B9tJjcp9t1krH2qRi8CCdsYfwe9JgSLurFBWwq4uOlipzfk5fHNvwFKr8Q==",
+            "dev": true
+        },
         "dir-glob": {
             "version": "3.0.1",
             "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
@@ -6096,6 +6256,12 @@
                 "wcwidth": "^1.0.1"
             }
         },
+        "eight-colors": {
+            "version": "1.3.0",
+            "resolved": "https://registry.npmjs.org/eight-colors/-/eight-colors-1.3.0.tgz",
+            "integrity": "sha512-hVoK898cR71ADj7L1LZWaECLaSkzzPtqGXIaKv4K6Pzb72QgjLVsQaNI+ELDQQshzFvgp5xTPkaYkPGqw3YR+g==",
+            "dev": true
+        },
         "emoji-regex": {
             "version": "9.2.2",
             "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-9.2.2.tgz",
@@ -6932,6 +7098,12 @@
             "integrity": "sha512-9hp3Vp2/hFQUiIwKo8XCeFVnrg8Pk3TYNPIR7tJADKi5YfcF7vEaK7avFHTlSy3kOKYaJQaalfEo6YuXdceBOQ==",
             "dev": true
         },
+        "lz-utils": {
+            "version": "2.0.2",
+            "resolved": "https://registry.npmjs.org/lz-utils/-/lz-utils-2.0.2.tgz",
+            "integrity": "sha512-i1PJN4hNEevkrvLMqNWCCac1BcB5SRaghywG7HVzWOyVkFOasLCG19ND1sY1F/ZEsM6SnGtoXyBWnmfqOM5r6g==",
+            "dev": true
+        },
         "make-dir": {
             "version": "4.0.0",
             "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
@@ -7134,6 +7306,68 @@
             "integrity": "sha512-nCf6dmCEHObJ8BBrcjW+UHYvVtHEL+FliYR/Mfc/v7dKenNmBQ0ZSuvlICgsyQy9Tt581ldvh+SReS4qp4LrQw==",
             "dev": true
         },
+        "monocart-code-viewer": {
+            "version": "1.1.4",
+            "resolved": "https://registry.npmjs.org/monocart-code-viewer/-/monocart-code-viewer-1.1.4.tgz",
+            "integrity": "sha512-ehSe1lBG7D1VDVLjTkHV63J3zAgzyhlC9OaxOri7D0X4L5/EcZUOG5TEoMmYErL+YGSOQXghU9kSSAelwNnp1Q==",
+            "dev": true
+        },
+        "monocart-coverage-reports": {
+            "version": "2.9.2",
+            "resolved": "https://registry.npmjs.org/monocart-coverage-reports/-/monocart-coverage-reports-2.9.2.tgz",
+            "integrity": "sha512-kczj6csD/OYJN4/qsRq5E8bMytHHw+Mi8InOnGH/zwszwsI92X4rbH9SJgmKm10wqzbOPwfxcHezLelK3CFWrA==",
+            "dev": true,
+            "requires": {
+                "@bcoe/v8-coverage": "^0.2.3",
+                "@jridgewell/sourcemap-codec": "^1.5.0",
+                "acorn": "^8.12.1",
+                "acorn-loose": "^8.4.0",
+                "acorn-walk": "^8.3.3",
+                "commander": "^12.1.0",
+                "console-grid": "^2.2.2",
+                "diff-sequences": "^29.6.3",
+                "eight-colors": "^1.3.0",
+                "foreground-child": "^3.2.1",
+                "istanbul-lib-coverage": "^3.2.2",
+                "istanbul-lib-report": "^3.0.1",
+                "istanbul-reports": "^3.1.7",
+                "lz-utils": "^2.0.2",
+                "minimatch": "^10.0.1",
+                "monocart-code-viewer": "^1.1.4",
+                "monocart-formatter": "^3.0.0",
+                "monocart-locator": "^1.0.2",
+                "turbogrid": "^3.2.0"
+            },
+            "dependencies": {
+                "commander": {
+                    "version": "12.1.0",
+                    "resolved": "https://registry.npmjs.org/commander/-/commander-12.1.0.tgz",
+                    "integrity": "sha512-Vw8qHK3bZM9y/P10u3Vib8o/DdkvA2OtPtZvD871QKjy74Wj1WSKFILMPRPSdUSx5RFK1arlJzEtA4PkFgnbuA==",
+                    "dev": true
+                },
+                "minimatch": {
+                    "version": "10.0.1",
+                    "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.0.1.tgz",
+                    "integrity": "sha512-ethXTt3SGGR+95gudmqJ1eNhRO7eGEGIgYA9vnPatK4/etz2MEVDno5GMCibdMTuBMyElzIlgxMna3K94XDIDQ==",
+                    "dev": true,
+                    "requires": {
+                        "brace-expansion": "^2.0.1"
+                    }
+                }
+            }
+        },
+        "monocart-formatter": {
+            "version": "3.0.0",
+            "resolved": "https://registry.npmjs.org/monocart-formatter/-/monocart-formatter-3.0.0.tgz",
+            "integrity": "sha512-91OQpUb/9iDqvrblUv6ki11Jxi1d3Fp5u2jfVAPl3UdNp9TM+iBleLzXntUS51W0o+zoya3CJjZZ01z2XWn25g==",
+            "dev": true
+        },
+        "monocart-locator": {
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/monocart-locator/-/monocart-locator-1.0.2.tgz",
+            "integrity": "sha512-v8W5hJLcWMIxLCcSi/MHh+VeefI+ycFmGz23Froer9QzWjrbg4J3gFJBuI/T1VLNoYxF47bVPPxq8ZlNX4gVCw==",
+            "dev": true
+        },
         "ms": {
             "version": "2.1.3",
             "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz",
@@ -7748,6 +7982,12 @@
             "integrity": "sha512-1h/Lnq9yajKY2PEbBadPXj3VxsDDu844OnaAo52UVmIzIvwwtBPIuNvkjuzBlTWpfJyUbG3ez0KSBibQkj4ojg==",
             "dev": true
         },
+        "turbogrid": {
+            "version": "3.2.0",
+            "resolved": "https://registry.npmjs.org/turbogrid/-/turbogrid-3.2.0.tgz",
+            "integrity": "sha512-c+2qrCGWzoYpLlxtHgRJ4V5dDRE9fUT7D9maxtdBCqJ0NzCdY+x7xF3/F6cG/+n3VIzKfIS+p9Z/0YMQPf6k/Q==",
+            "dev": true
+        },
         "type-check": {
             "version": "0.4.0",
             "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
diff --git a/package.json b/package.json
index cbfbcd664c7..da8fac5d774 100644
--- a/package.json
+++ b/package.json
@@ -72,6 +72,7 @@
         "minimist": "^1.2.8",
         "mocha": "^10.5.2",
         "mocha-fivemat-progress-reporter": "^0.1.0",
+        "monocart-coverage-reports": "^2.9.2",
         "ms": "^2.1.3",
         "node-fetch": "^3.3.2",
         "playwright": "^1.45.0",
diff --git a/scripts/build/tests.mjs b/scripts/build/tests.mjs
index d921d0e5704..c2d11b3b569 100644
--- a/scripts/build/tests.mjs
+++ b/scripts/build/tests.mjs
@@ -32,7 +32,7 @@ export const coverageDir = "coverage";
  * @param {boolean} [options.watching]
  */
 export async function runConsoleTests(runJs, defaultReporter, runInParallel, options = {}) {
-    const testTimeout = cmdLineOptions.timeout;
+    let testTimeout = cmdLineOptions.timeout;
     const tests = cmdLineOptions.tests;
     const skipSysTests = cmdLineOptions.skipSysTests;
     const inspect = cmdLineOptions.break || cmdLineOptions.inspect;
@@ -45,6 +45,12 @@ export async function runConsoleTests(runJs, defaultReporter, runInParallel, opt
     const shards = +cmdLineOptions.shards || undefined;
     const shardId = +cmdLineOptions.shardId || undefined;
     const coverage = cmdLineOptions.coverage;
+
+    if (coverage && testTimeout) {
+        testTimeout *= 2;
+        console.log(chalk.yellowBright(`[coverage] doubling test timeout to ${testTimeout}ms...`));
+    }
+
     if (!cmdLineOptions.dirty) {
         if (options.watching) {
             console.log(chalk.yellowBright(`[watch] cleaning test directories...`));
@@ -142,9 +148,14 @@ export async function runConsoleTests(runJs, defaultReporter, runInParallel, opt
             process.env.NODE_V8_COVERAGE = path.resolve(coverageDir, "tmp");
         }
 
-        await exec(process.execPath, args, { token: options.token });
-        if (coverage) {
-            await exec("npm", ["--prefer-offline", "exec", "--", "c8", "report"], { token: options.token });
+        try {
+            await exec(process.execPath, args, { token: options.token });
+        }
+        finally {
+            // Calculate coverage even if tests failed.
+            if (coverage) {
+                await exec("npm", ["--prefer-offline", "exec", "--", "c8", "report", "--experimental-monocart"], { token: options.token });
+            }
         }
     }
     catch (e) {