diff --git a/.github/workflows/CI.yaml b/.github/workflows/CI.yaml
index 5ac6eb377..9d3397f67 100644
--- a/.github/workflows/CI.yaml
+++ b/.github/workflows/CI.yaml
@@ -12,52 +12,39 @@ jobs:
       matrix:
         include:
           - name: "Linux: Node 18"
-            os: ubuntu-20.04
-            node: 18.x
-            script: npm run test-nolint
-
-          - name: "Linux: Node 16"
             # Includes 'firefox', 'chromium', and more.
             # https://github.com/actions/virtual-environments/blob/ubuntu20/20220410.2/images/linux/Ubuntu2004-Readme.md
             os: ubuntu-20.04
-            node: 16.x
-            # Run the lint step only once because, in March 2022, GitHub began
-            # automatically extracting ESLint warnings from build logs and turning them into
-            # checks shown inline in PR diffs, but doesn't de-duplicate these.
+            node: 18.x
             script: npm test
 
-          - name: "Linux: Node 14"
-            os: ubuntu-20.04
-            node: 14.x
-            script: npm run test-nolint
+          - name: "Linux: Node 20"
+            os: ubuntu-22.04
+            node: 20.x
+            script: npm run test
 
-          - name: "Linux: Node 12"
-            os: ubuntu-20.04
-            node: 12.x
-            script: npm run test-nolint
-
-          - name: "Linux: Node 10"
-            os: ubuntu-20.04
-            node: 10.x
-            script: npm run test-nolint
+          - name: "Linux: Node 22"
+            os: ubuntu-24.04
+            node: 22.x
+            script: npm run test
 
           - name: "Integration"
             os: ubuntu-20.04
-            node: 16.x
+            node: 18.x
             script: npm run test-integration
 
-          - name: "Windows: Node 16"
+          - name: "Windows: Node 18"
             os: windows-latest
-            node: 16.x
+            node: 18.x
             script: npm run test-nolint
 
           # use macos-12 instead of macos-latest
           # as proxy for Intel instead of ARM
-          # because the older Puppeteer/Chromr for Node 10 compat
+          # because the older Puppeteer/Chrome for Node 10 compat
           # didn't support ARM yet.
-          - name: "macOS: Node 16"
+          - name: "macOS: Node 18"
             os: macos-12
-            node: 16.x
+            node: 18.x
             script: npm run test-nolint
 
     name: ${{ matrix.name }}
diff --git a/.github/workflows/browsers-full.yaml b/.github/workflows/browsers-full.yaml
index dbb92db07..08a0fd4b3 100644
--- a/.github/workflows/browsers-full.yaml
+++ b/.github/workflows/browsers-full.yaml
@@ -27,10 +27,10 @@ jobs:
             ${{ github.workspace }}/.puppeteer_download
           key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}
 
-      - name: Use Node.js 16
+      - name: Use Node.js 18
         uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 18.x
 
       - name: Prepare
         run: |
diff --git a/.github/workflows/browsers-quick.yaml b/.github/workflows/browsers-quick.yaml
index 12b785328..a86649076 100644
--- a/.github/workflows/browsers-quick.yaml
+++ b/.github/workflows/browsers-quick.yaml
@@ -19,10 +19,10 @@ jobs:
             ${{ github.workspace }}/.puppeteer_download
           key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}
 
-      - name: Use Node.js 16
+      - name: Use Node.js 18
         uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 18.x
 
       - name: Prepare
         run: |
diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
index 5e160a03c..99b5ed8a8 100644
--- a/.github/workflows/coverage.yaml
+++ b/.github/workflows/coverage.yaml
@@ -19,10 +19,10 @@ jobs:
             ${{ github.workspace }}/.puppeteer_download
           key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}
 
-      - name: Use Node.js 16
+      - name: Use Node.js 18
         uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 18.x
 
       - run: npm ci
 
diff --git a/.github/workflows/reproducible.yaml b/.github/workflows/reproducible.yaml
index ad46e6407..8ac61a667 100644
--- a/.github/workflows/reproducible.yaml
+++ b/.github/workflows/reproducible.yaml
@@ -18,9 +18,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Use Node.js 16
+      - name: Use Node.js 18
         uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 18.x
 
       - run: node build/reproducible-builds.js
diff --git a/package-lock.json b/package-lock.json
index 3778598a2..b41331fbe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -50,11 +50,10 @@
         "proxyquire": "^1.8.0",
         "requirejs": "^2.3.6",
         "rimraf": "^3.0.2",
-        "rollup": "^2.79.1",
-        "semver": "^7.6.2"
+        "rollup": "^2.79.1"
       },
       "engines": {
-        "node": ">=10"
+        "node": ">=18"
       }
     },
     "node_modules/@ampproject/remapping": {
diff --git a/package.json b/package.json
index 21cbae73f..7689b2ee1 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   ],
   "main": "qunit/qunit.js",
   "engines": {
-    "node": ">=10"
+    "node": ">=18"
   },
   "dependencies": {
     "commander": "7.2.0",
@@ -79,8 +79,7 @@
     "proxyquire": "^1.8.0",
     "requirejs": "^2.3.6",
     "rimraf": "^3.0.2",
-    "rollup": "^2.79.1",
-    "semver": "^7.6.2"
+    "rollup": "^2.79.1"
   },
   "scripts": {
     "build": "rollup -c && grunt copy:src-css",
diff --git a/test/cli/cli-main.js b/test/cli/cli-main.js
index 4e919002f..d83c5496e 100644
--- a/test/cli/cli-main.js
+++ b/test/cli/cli-main.js
@@ -2,8 +2,6 @@
 
 const path = require('path');
 
-const semver = require('semver');
-
 const { execute, concurrentMapKeys } = require('./helpers/execute.js');
 const { readFixtures } = require('./helpers/fixtures.js');
 
@@ -222,34 +220,28 @@ HOOK: BCD1 @ B after`;
     assert.equal(execution.code, 0);
   });
 
-  if (semver.gte(process.versions.node, '12.0.0')) {
-    QUnit.test('run ESM test suite with import statement', async assert => {
-      const command = ['qunit', '../../es2018/esm.mjs'];
-      const execution = await execute(command);
-
-      // Node 12 enabled ESM by default, without experimental flag,
-      // but left the warning in stderr. The warning was removed in Node 14.
-      // Don't bother checking stderr
-      const stderr = semver.gte(process.versions.node, '14.0.0') ? execution.stderr : '';
-      assert.equal(execution.code, 0);
-      assert.equal(stderr, '');
-      assert.equal(execution.stdout, `TAP version 13
+  // TODO: Move to /test/cli/fixtures/
+  QUnit.test('run ESM test suite with import statement', async assert => {
+    const command = ['qunit', '../../es2018/esm.mjs'];
+    const execution = await execute(command);
+
+    assert.equal(execution.code, 0);
+    assert.equal(execution.stderr, '');
+    assert.equal(execution.stdout, `TAP version 13
 ok 1 ESM test suite > sum()
 1..1
 # pass 1
 # skip 0
 # todo 0
 # fail 0`);
-    });
-  }
+  });
 
-  // https://nodejs.org/dist/v12.12.0/docs/api/cli.html#cli_enable_source_maps
-  if (semver.gte(process.versions.node, '14.0.0')) {
-    QUnit.test('normal trace with native source map', async assert => {
-      const command = ['qunit', 'sourcemap/source.js'];
-      const execution = await execute(command);
+  // TODO: Move to /test/cli/fixtures/
+  QUnit.test('normal trace with native source map', async assert => {
+    const command = ['qunit', 'sourcemap/source.js'];
+    const execution = await execute(command);
 
-      assert.equal(execution.snapshot, `TAP version 13
+    assert.equal(execution.snapshot, `TAP version 13
 ok 1 Example > good
 not ok 2 Example > bad
   ---
@@ -267,18 +259,18 @@ not ok 2 Example > bad
 # fail 1
 
 # exit code: 1`);
-    });
+  });
 
-    // skip if running in code coverage mode,
-    // as that leads to conflicting maps-on-maps that invalidate this test
-    QUnit[process.env.NYC_PROCESS_ID ? 'skip' : 'test'](
-      'mapped trace with native source map', async function (assert) {
-        const command = ['qunit', 'sourcemap/source.min.js'];
-        const execution = await execute(command, {
-          env: { NODE_OPTIONS: '--enable-source-maps' }
-        });
+  // skip if running in code coverage mode,
+  // as that leads to conflicting maps-on-maps that invalidate this test
+  QUnit[process.env.NYC_PROCESS_ID ? 'skip' : 'test'](
+    'mapped trace with native source map', async function (assert) {
+      const command = ['qunit', 'sourcemap/source.min.js'];
+      const execution = await execute(command, {
+        env: { NODE_OPTIONS: '--enable-source-maps' }
+      });
 
-        assert.equal(execution.snapshot, `TAP version 13
+      assert.equal(execution.snapshot, `TAP version 13
 ok 1 Example > good
 not ok 2 Example > bad
   ---
@@ -296,16 +288,13 @@ not ok 2 Example > bad
 # fail 1
 
 # exit code: 1`);
-      });
-  }
-
-  // https://nodejs.org/docs/v14.0.0/api/v8.html#v8_v8_getheapsnapshot
-  // Created in Node 11.x, but starts working the way we need from Node 14.
-  if (semver.gte(process.versions.node, '14.0.0')) {
-    QUnit.test('memory-leak/module-closure [unfiltered]', async assert => {
-      const command = ['node', '--expose-gc', '../../../bin/qunit.js', 'memory-leak/module-closure.js'];
-      const execution = await execute(command);
-      assert.equal(execution.snapshot, `TAP version 13
+    });
+
+  // TODO: Move to /test/cli/fixtures/
+  QUnit.test('memory-leak/module-closure [unfiltered]', async assert => {
+    const command = ['node', '--expose-gc', '../../../bin/qunit.js', 'memory-leak/module-closure.js'];
+    const execution = await execute(command);
+    assert.equal(execution.snapshot, `TAP version 13
 ok 1 module-closure > example test
 ok 2 module-closure > example child module > example child module test
 ok 3 module-closure check > memory release
@@ -314,12 +303,12 @@ ok 3 module-closure check > memory release
 # skip 0
 # todo 0
 # fail 0`);
-    });
+  });
 
-    QUnit.test('memory-leak/module-closure [filtered module]', async assert => {
-      const command = ['node', '--expose-gc', '../../../bin/qunit.js', '--filter', '!child', 'memory-leak/module-closure.js'];
-      const execution = await execute(command);
-      assert.equal(execution.snapshot, `TAP version 13
+  QUnit.test('memory-leak/module-closure [filtered module]', async assert => {
+    const command = ['node', '--expose-gc', '../../../bin/qunit.js', '--filter', '!child', 'memory-leak/module-closure.js'];
+    const execution = await execute(command);
+    assert.equal(execution.snapshot, `TAP version 13
 ok 1 module-closure > example test
 ok 2 module-closure check > memory release
 1..2
@@ -327,20 +316,19 @@ ok 2 module-closure check > memory release
 # skip 0
 # todo 0
 # fail 0`);
-    });
+  });
 
-    QUnit.test('memory-leak/test-object', async assert => {
-      const command = ['node', '--expose-gc', '../../../bin/qunit.js', 'memory-leak/test-object.js'];
-      const execution = await execute(command);
-      assert.equal(execution.snapshot, `TAP version 13
+  QUnit.test('memory-leak/test-object', async assert => {
+    const command = ['node', '--expose-gc', '../../../bin/qunit.js', 'memory-leak/test-object.js'];
+    const execution = await execute(command);
+    assert.equal(execution.snapshot, `TAP version 13
 ok 1 test-object > example test
 1..1
 # pass 1
 # skip 0
 # todo 0
 # fail 0`);
-    });
-  }
+  });
 
   // TODO: Workaround fact that child_process.spawn() args array is a lie on Windows.
   // https://github.com/nodejs/node/issues/29532