diff --git a/jake.bat b/jake.bat
index 1489fd7a..590f3859 100644
--- a/jake.bat
+++ b/jake.bat
@@ -1,2 +1,2 @@
 @ECHO OFF
-@"%~dp0node.exe" "%~dp0/node_modules/jake/bin/cli.js" %*
+node "%~dp0bin/cli.js" %*
diff --git a/package-lock.json b/package-lock.json
index 8a980e8d..4761b0cd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,393 +1,524 @@
 {
   "name": "jake",
   "version": "10.8.5",
-  "lockfileVersion": 1,
+  "lockfileVersion": 3,
   "requires": true,
-  "dependencies": {
-    "@babel/code-frame": {
+  "packages": {
+    "": {
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+      "version": "10.8.5",
+      "license": "Apache-2.0",
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+        "async": "^3.2.3",
+        "chalk": "^4.0.2",
+        "filelist": "^1.0.4",
+        "minimatch": "^3.1.2"
+      },
+      "bin": {
+        "jake": "bin/cli.js"
+      },
+      "devDependencies": {
+        "eslint": "^6.8.0",
+        "mocha": "^10.2.0",
+        "q": "^1.5.1",
+        "typescript": "^5.0.2"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/@babel/code-frame": {
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       "dev": true,
-      "requires": {
+      "dependencies": {
         "@babel/highlight": "^7.8.3"
       }
     },
-    "@babel/helper-validator-identifier": {
+    "node_modules/@babel/helper-validator-identifier": {
       "version": "7.9.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.9.5.tgz",
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       "dev": true
     },
-    "@babel/highlight": {
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       "version": "7.9.0",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.9.0.tgz",
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       "dev": true,
-      "requires": {
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         "@babel/helper-validator-identifier": "^7.9.0",
         "chalk": "^2.0.0",
         "js-tokens": "^4.0.0"
+      }
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+        "supports-color": "^5.3.0"
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+      "dev": true,
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       "dev": true,
-      "requires": {
+      "dependencies": {
         "mkdirp": "^0.5.1"
+      },
+      "engines": {
+        "node": ">=4"
       }
     },
-    "y18n": {
+    "node_modules/y18n": {
       "version": "5.0.8",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
       "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
-      "dev": true
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      }
     },
-    "yargs": {
+    "node_modules/yargs": {
       "version": "16.2.0",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
       "integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
       "dev": true,
-      "requires": {
+      "dependencies": {
         "cliui": "^7.0.2",
         "escalade": "^3.1.1",
         "get-caller-file": "^2.0.5",
@@ -1692,31 +2238,46 @@
         "string-width": "^4.2.0",
         "y18n": "^5.0.5",
         "yargs-parser": "^20.2.2"
+      },
+      "engines": {
+        "node": ">=10"
       }
     },
-    "yargs-parser": {
+    "node_modules/yargs-parser": {
       "version": "20.2.4",
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.4.tgz",
       "integrity": "sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA==",
-      "dev": true
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      }
     },
-    "yargs-unparser": {
+    "node_modules/yargs-unparser": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
       "integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
       "dev": true,
-      "requires": {
+      "dependencies": {
         "camelcase": "^6.0.0",
         "decamelize": "^4.0.0",
         "flat": "^5.0.2",
         "is-plain-obj": "^2.1.0"
+      },
+      "engines": {
+        "node": ">=10"
       }
     },
-    "yocto-queue": {
+    "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
       "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
-      "dev": true
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 1182d4f3..8bee789d 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   "scripts": {
     "lint": "eslint --format codeframe \"lib/**/*.js\" \"test/**/*.js\"",
     "lint:fix": "eslint --fix \"lib/**/*.js\" \"test/**/*.js\"",
-    "test": "./bin/cli.js test",
+    "test": "node ./bin/cli.js test",
     "test:ci": "npm run lint && npm run test"
   },
   "repository": {
diff --git a/test/integration/.gitignore b/test/integration/.gitignore
new file mode 100644
index 00000000..36b31b25
--- /dev/null
+++ b/test/integration/.gitignore
@@ -0,0 +1,3 @@
+*.txt
+*.json
+*.tar.gz
diff --git a/test/integration/concurrent.js b/test/integration/concurrent.js
index ab649b9c..4a9f4c24 100644
--- a/test/integration/concurrent.js
+++ b/test/integration/concurrent.js
@@ -1,41 +1,38 @@
 let assert = require('assert');
-let exec = require('child_process').execSync;
-
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
+let { execJake } = require('./helpers');
 
 suite('concurrent', function () {
 
   this.timeout(7000);
 
   test(' simple concurrent prerequisites 1', function () {
-    let out = exec(`${JAKE_CMD} -q concurrent:simple1`).toString().trim();
+    let out = execJake('-q concurrent:simple1');
     assert.equal('Started A\nStarted B\nFinished B\nFinished A', out);
   });
 
   test(' simple concurrent prerequisites 2', function () {
-    let out = exec(`${JAKE_CMD} -q concurrent:simple2`).toString().trim();
+    let out = execJake('-q concurrent:simple2');
     assert.equal('Started C\nStarted D\nFinished C\nFinished D', out);
   });
 
   test(' sequential concurrent prerequisites', function () {
-    let out = exec(`${JAKE_CMD} -q concurrent:seqconcurrent`).toString().trim();
+    let out = execJake('-q concurrent:seqconcurrent');
     assert.equal('Started A\nStarted B\nFinished B\nFinished A\nStarted C\nStarted D\nFinished C\nFinished D', out);
   });
 
   test(' concurrent concurrent prerequisites', function () {
-    let out = exec(`${JAKE_CMD} -q concurrent:concurrentconcurrent`).toString().trim();
+    let out = execJake('-q concurrent:concurrentconcurrent');
     assert.equal('Started A\nStarted B\nStarted C\nStarted D\nFinished B\nFinished C\nFinished A\nFinished D', out);
   });
 
   test(' concurrent prerequisites with subdependency', function () {
-    let out = exec(`${JAKE_CMD} -q concurrent:subdep`).toString().trim();
+    let out = execJake('-q concurrent:subdep');
     assert.equal('Started A\nFinished A\nStarted Ba\nFinished Ba', out);
   });
 
   test(' failing in concurrent prerequisites', function () {
     try {
-      exec(`${JAKE_CMD} -q concurrent:Cfail`);
+      execJake('-q concurrent:Cfail');
     }
     catch(err) {
       assert(err.message.indexOf('Command failed') > -1);
diff --git a/test/integration/file.js b/test/integration/file.js
index 97ed0d63..d7b99479 100644
--- a/test/integration/file.js
+++ b/test/integration/file.js
@@ -16,213 +16,190 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-
-let assert = require('assert');
-let fs = require('fs');
-let path = require('path');
-let file = require(`${PROJECT_DIR}/lib/utils/file`);
-let existsSync = fs.existsSync || path.existsSync;
-let exec = require('child_process').execSync;
+const assert = require('assert');
+const fs = require('fs');
+const file = require('../../lib/utils/file');
+const { assertFileMode, testRequiresWindowsElevation, ensureDirs } = require('./helpers');
+const { suite, setup, test } = require('mocha');
 
 suite('fileUtils', function () {
 
-  test('mkdirP', function () {
-    let expected = [
-      ['foo'],
-      ['foo', 'bar'],
-      ['foo', 'bar', 'baz'],
-      ['foo', 'bar', 'baz', 'qux']
-    ];
-    file.mkdirP('foo/bar/baz/qux');
-    let res = exec('find foo').toString().trim().split('\n');
-    for (let i = 0, ii = res.length; i < ii; i++) {
-      assert.equal(path.join.apply(path, expected[i]), res[i]);
-    }
-    file.rmRf('foo');
-  });
+  suite('mkdirP', function () {
 
-  test('rmRf', function () {
-    file.mkdirP('foo/bar/baz/qux');
-    file.rmRf('foo/bar');
-    let res = exec('find foo').toString().trim().split('\n');
-    assert.equal(1, res.length);
-    assert.equal('foo', res[0]);
-    fs.rmdirSync('foo');
-  });
+    setup(function () {
+      // we need to clear the dirs here, since we're testing dir creation itself.
+      ensureDirs(false, 'foo');
+    });
 
-  test('rmRf with symlink subdir', function () {
-    file.mkdirP('foo');
-    file.mkdirP('bar');
-    fs.writeFileSync('foo/hello.txt', 'hello, it\'s me');
-    fs.symlinkSync('../foo', 'bar/foo'); file.rmRf('bar');
-
-    // Make sure the bar directory was successfully deleted
-    let barDeleted = false;
-    try {
-      fs.statSync('bar');
-    } catch(err) {
-      if(err.code == 'ENOENT') {
-        barDeleted = true;
-      }
-    }
-    assert.equal(true, barDeleted);
-
-    // Make sure that the file inside the linked folder wasn't deleted
-    let res = fs.readdirSync('foo');
-    assert.equal(1, res.length);
-    assert.equal('hello.txt', res[0]);
-
-    // Cleanup
-    fs.unlinkSync('foo/hello.txt');
-    fs.rmdirSync('foo');
-  });
+    test('with dir', function () {
+      file.mkdirP('foo');
+      assert.ok(fs.existsSync('foo'));
+      ensureDirs(false, 'foo');
+    });
 
-  test('rmRf with symlinked dir', function () {
-    file.mkdirP('foo');
-    fs.writeFileSync('foo/hello.txt', 'hello!');
-    fs.symlinkSync('foo', 'bar');
-    file.rmRf('bar');
-
-    // Make sure the bar directory was successfully deleted
-    let barDeleted = false;
-    try {
-      fs.statSync('bar');
-    } catch(err) {
-      if(err.code == 'ENOENT') {
-        barDeleted = true;
-      }
-    }
-    assert.equal(true, barDeleted);
-
-    // Make sure that the file inside the linked folder wasn't deleted
-    let res = fs.readdirSync('foo');
-    assert.equal(1, res.length);
-    assert.equal('hello.txt', res[0]);
-
-    // Cleanup
-    fs.unlinkSync('foo/hello.txt');
-    fs.rmdirSync('foo');
-  });
+    test('with subdir', function () {
+      file.mkdirP('foo/bar/baz/qux');
+      assert.ok(fs.existsSync('foo/bar/baz/qux'));
+      ensureDirs(false, 'foo');
+    });
 
-  test('cpR with same name and different directory', function () {
-    file.mkdirP('foo');
-    fs.writeFileSync('foo/bar.txt', 'w00t');
-    file.cpR('foo', 'bar');
-    assert.ok(existsSync('bar/bar.txt'));
-    file.rmRf('foo');
-    file.rmRf('bar');
   });
 
-  test('cpR with same to and from will throw', function () {
-    assert.throws(function () {
-      file.cpR('foo.txt', 'foo.txt');
+  suite('rmRf', function () {
+
+    test('with subdir', function () {
+      ensureDirs('foo/bar/baz/qux');
+      file.rmRf('foo/bar');
+      assert.deepStrictEqual(fs.readdirSync('foo'), []);
+      assert.strictEqual(fs.existsSync('foo/bar'), false);
+      ensureDirs(false, 'foo');
     });
-  });
 
-  test('cpR rename via copy in directory', function () {
-    file.mkdirP('foo');
-    fs.writeFileSync('foo/bar.txt', 'w00t');
-    file.cpR('foo/bar.txt', 'foo/baz.txt');
-    assert.ok(existsSync('foo/baz.txt'));
-    file.rmRf('foo');
-  });
+    test('with symlink subdir', function () {
+      testRequiresWindowsElevation(this);
 
-  test('cpR rename via copy in base', function () {
-    fs.writeFileSync('bar.txt', 'w00t');
-    file.cpR('bar.txt', 'baz.txt');
-    assert.ok(existsSync('baz.txt'));
-    file.rmRf('bar.txt');
-    file.rmRf('baz.txt');
-  });
+      ensureDirs('foo', 'bar');
+      fs.writeFileSync('foo/hello.txt', 'hello, it\'s me');
+      fs.symlinkSync('../foo', 'bar/foo');
 
-  test('cpR keeps file mode', function () {
-    fs.writeFileSync('bar.txt', 'w00t', {mode: 0o750});
-    fs.writeFileSync('bar1.txt', 'w00t!', {mode: 0o744});
-    file.cpR('bar.txt', 'baz.txt');
-    file.cpR('bar1.txt', 'baz1.txt');
-
-    assert.ok(existsSync('baz.txt'));
-    assert.ok(existsSync('baz1.txt'));
-    let bazStat = fs.statSync('baz.txt');
-    let bazStat1 = fs.statSync('baz1.txt');
-    assert.equal(0o750, bazStat.mode & 0o7777);
-    assert.equal(0o744, bazStat1.mode & 0o7777);
-
-    file.rmRf('bar.txt');
-    file.rmRf('baz.txt');
-    file.rmRf('bar1.txt');
-    file.rmRf('baz1.txt');
-  });
+      file.rmRf('bar');
 
-  test('cpR keeps file mode when overwriting with preserveMode', function () {
-    fs.writeFileSync('bar.txt', 'w00t', {mode: 0o755});
-    fs.writeFileSync('baz.txt', 'w00t!', {mode: 0o744});
-    file.cpR('bar.txt', 'baz.txt', {silent: true, preserveMode: true});
+      // Make sure the bar directory was successfully deleted
+      assert.strictEqual(fs.existsSync('bar'), false);
 
-    assert.ok(existsSync('baz.txt'));
-    let bazStat = fs.statSync('baz.txt');
-    assert.equal(0o755, bazStat.mode & 0o777);
+      // Make sure that the file inside the linked folder wasn't deleted
+      assert.strictEqual(fs.existsSync('foo/hello.txt'), true);
 
-    file.rmRf('bar.txt');
-    file.rmRf('baz.txt');
-  });
+      // Cleanup
+      fs.unlinkSync('foo/hello.txt');
+      ensureDirs(false, 'foo', 'bar');
+    });
 
-  test('cpR does not keep file mode when overwriting', function () {
-    fs.writeFileSync('bar.txt', 'w00t', {mode: 0o766});
-    fs.writeFileSync('baz.txt', 'w00t!', {mode: 0o744});
-    file.cpR('bar.txt', 'baz.txt');
+    test('with symlinked dir', function () {
+      testRequiresWindowsElevation(this);
 
-    assert.ok(existsSync('baz.txt'));
-    let bazStat = fs.statSync('baz.txt');
-    assert.equal(0o744, bazStat.mode & 0o777);
+      ensureDirs('foo');
+      fs.writeFileSync('foo/hello.txt', 'hello!');
+      fs.symlinkSync('foo', 'bar');
 
-    file.rmRf('bar.txt');
-    file.rmRf('baz.txt');
-  });
+      file.rmRf('bar');
 
-  test('cpR copies file mode recursively', function () {
-    fs.mkdirSync('foo');
-    fs.writeFileSync('foo/bar.txt', 'w00t', {mode: 0o740});
-    file.cpR('foo', 'baz');
+      // Make sure the bar directory was successfully deleted
+      assert.strictEqual(fs.existsSync('bar'), false);
 
-    assert.ok(existsSync('baz'));
-    let barStat = fs.statSync('baz/bar.txt');
-    assert.equal(0o740, barStat.mode & 0o777);
+      // Make sure that the file inside the linked folder wasn't deleted
+      assert.strictEqual(fs.existsSync('foo/hello.txt'), true);
+
+      // Cleanup
+      fs.unlinkSync('foo/hello.txt');
+      ensureDirs(false, 'foo', 'bar');
+    });
 
-    file.rmRf('foo');
-    file.rmRf('baz');
   });
 
-  test('cpR keeps file mode recursively', function () {
-    fs.mkdirSync('foo');
-    fs.writeFileSync('foo/bar.txt', 'w00t', {mode: 0o740});
-    fs.mkdirSync('baz');
-    fs.mkdirSync('baz/foo');
-    fs.writeFileSync('baz/foo/bar.txt', 'w00t!', {mode: 0o755});
-    file.cpR('foo', 'baz', {silent: true, preserveMode: true});
+  suite('cpR', function () {
 
-    assert.ok(existsSync('baz'));
-    let barStat = fs.statSync('baz/foo/bar.txt');
-    assert.equal(0o740, barStat.mode & 0o777);
+    test('with same name and different directory', function () {
+      ensureDirs('foo', false, 'bar');
+      fs.writeFileSync('foo/bar.txt', 'w00t');
 
-    file.rmRf('foo');
-    file.rmRf('baz');
-  });
+      file.cpR('foo', 'bar');
+      assert.ok(fs.existsSync('bar/bar.txt'));
 
-  test('cpR copies directory mode recursively', function () {
-    fs.mkdirSync('foo', 0o755);
-    fs.mkdirSync('foo/bar', 0o700);
-    file.cpR('foo', 'bar');
+      ensureDirs(false, 'foo', 'bar');
+    });
 
-    assert.ok(existsSync('foo'));
-    let fooBarStat = fs.statSync('bar/bar');
-    assert.equal(0o700, fooBarStat.mode & 0o777);
+    test('with same to and from will throw', function () {
+      assert.throws(function () {
+        file.cpR('foo.txt', 'foo.txt');
+      });
+    });
 
-    file.rmRf('foo');
-    file.rmRf('bar');
-  });
+    test('rename via copy in directory', function () {
+      ensureDirs('foo');
+      fs.writeFileSync('foo/bar.txt', 'w00t');
+
+      file.cpR('foo/bar.txt', 'foo/baz.txt');
+      assert.ok(fs.existsSync('foo/baz.txt'));
+
+      ensureDirs(false, 'foo');
+    });
+
+    test('rename via copy in base', function () {
+      fs.writeFileSync('bar.txt', 'w00t');
+
+      file.cpR('bar.txt', 'baz.txt');
+      assert.ok(fs.existsSync('baz.txt'));
 
+      fs.rmSync('bar.txt');
+      fs.rmSync('baz.txt');
+    });
+
+    test('keeps file mode', function () {
+      [ 0o750, 0o744 ].forEach((mode) => {
+        fs.writeFileSync('bar.txt', 'w00t', { mode: mode });
+
+        file.cpR('bar.txt', 'baz.txt');
+        assertFileMode('baz.txt', mode);
+
+        fs.rmSync('bar.txt');
+        fs.rmSync('baz.txt');
+      });
+    });
+
+    test('keeps file mode when overwriting with preserveMode', function () {
+      fs.writeFileSync('bar.txt', 'w00t', {mode: 0o755});
+      fs.writeFileSync('baz.txt', 'w00t!', {mode: 0o744});
+
+      file.cpR('bar.txt', 'baz.txt', {silent: true, preserveMode: true});
+      assertFileMode('baz.txt', 0o755);
+
+      fs.rmSync('bar.txt');
+      fs.rmSync('baz.txt');
+    });
+
+    test('does not keep file mode when overwriting', function () {
+      fs.writeFileSync('bar.txt', 'w00t', {mode: 0o766});
+      fs.writeFileSync('baz.txt', 'w00t!', {mode: 0o744});
+
+      file.cpR('bar.txt', 'baz.txt');
+      assertFileMode('baz.txt', 0o744);
+
+      fs.rmSync('bar.txt');
+      fs.rmSync('baz.txt');
+    });
+
+    test('copies file mode recursively', function () {
+      ensureDirs('foo', false, 'baz');
+      fs.writeFileSync('foo/bar.txt', 'w00t', {mode: 0o740});
+
+      file.cpR('foo', 'baz');
+      assertFileMode('baz/bar.txt', 0o740);
+
+      ensureDirs(false, 'foo', 'baz');
+    });
+
+    test('keeps file mode recursively', function () {
+      ensureDirs('foo', 'baz/foo');
+      fs.writeFileSync('foo/bar.txt', 'w00t', {mode: 0o740});
+      fs.writeFileSync('baz/foo/bar.txt', 'w00t!', {mode: 0o755});
+
+      file.cpR('foo', 'baz', {silent: true, preserveMode: true});
+      assertFileMode('baz/foo/bar.txt', 0o740);
+
+      ensureDirs(false, 'foo', 'baz');
+    });
+
+    test('copies directory mode recursively', function () {
+      ensureDirs(0o755, 'foo', 0o700, 'foo/bar');
+
+      file.cpR('foo', 'bar');
+      assertFileMode('bar/bar', 0o700);
+
+      ensureDirs(false, 'foo', 'bar');
+    });
+
+  });
 });
 
 
diff --git a/test/integration/file_task.js b/test/integration/file_task.js
index a320ea2b..6c79a501 100644
--- a/test/integration/file_task.js
+++ b/test/integration/file_task.js
@@ -16,13 +16,10 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
-
 let assert = require('assert');
 let fs = require('fs');
-let exec = require('child_process').execSync;
-let { rmRf } = require(`${PROJECT_DIR}/lib/jake`);
+let { rmRf } = require('../../lib/jake');
+const { execJake } = require('./helpers');
 
 let cleanUpAndNext = function (callback) {
   rmRf('./foo', {
@@ -39,86 +36,110 @@ suite('fileTask', function () {
   });
 
   test('where a file-task prereq does not change with --always-make', function () {
-    let out;
-    out = exec(`${JAKE_CMD} -q fileTest:foo/from-src1.txt`).toString().trim();
-    assert.equal('fileTest:foo/src1.txt task\nfileTest:foo/from-src1.txt task',
-      out);
-    out = exec(`${JAKE_CMD} -q -B fileTest:foo/from-src1.txt`).toString().trim();
-    assert.equal('fileTest:foo/src1.txt task\nfileTest:foo/from-src1.txt task',
-      out);
+
+    let out = execJake('-q fileTest:foo/from-src1.txt');
+    assert.equal(out, [
+      'fileTest:foo/src1.txt task',
+      'fileTest:foo/from-src1.txt task',
+    ].join("\n"));
+
+    out = execJake('-q -B fileTest:foo/from-src1.txt');
+    assert.equal(out, [
+      'fileTest:foo/src1.txt task',
+      'fileTest:foo/from-src1.txt task',
+    ].join("\n"));
+
     cleanUpAndNext();
   });
 
   test('concating two files', function () {
-    let out;
-    out = exec(`${JAKE_CMD} -q fileTest:foo/concat.txt`).toString().trim();
-    assert.equal('fileTest:foo/src1.txt task\ndefault task\nfileTest:foo/src2.txt task\n' +
-          'fileTest:foo/concat.txt task', out);
+
+    let out = execJake('-q fileTest:foo/concat.txt');
+    assert.equal(out, [
+      'fileTest:foo/src1.txt task',
+      'default task',
+      'fileTest:foo/src2.txt task',
+      'fileTest:foo/concat.txt task',
+    ].join('\n'));
+
     // Check to see the two files got concat'd
-    let data = fs.readFileSync(process.cwd() + '/foo/concat.txt');
-    assert.equal('src1src2', data.toString());
+    let data = fs.readFileSync('foo/concat.txt');
+    assert.equal(data.toString(), 'src1src2');
+
     cleanUpAndNext();
   });
 
   test('where a file-task prereq does not change', function () {
-    let out;
-    out = exec(`${JAKE_CMD} -q fileTest:foo/from-src1.txt`).toString().trim();
-    assert.equal('fileTest:foo/src1.txt task\nfileTest:foo/from-src1.txt task', out);
-    out = exec(`${JAKE_CMD} -q fileTest:foo/from-src1.txt`).toString().trim();
+
+    let out = execJake('-q fileTest:foo/from-src1.txt');
+    assert.equal(out, [
+      'fileTest:foo/src1.txt task',
+      'fileTest:foo/from-src1.txt task',
+    ].join("\n"));
+
+    out = execJake('-q fileTest:foo/from-src1.txt');
     // Second time should be a no-op
-    assert.equal('', out);
+    assert.equal(out, '');
+
     cleanUpAndNext();
   });
 
   test('where a file-task prereq does change, then does not', function (next) {
-    exec('mkdir -p ./foo');
-    exec('touch ./foo/from-src1.txt');
+    fs.mkdirSync('foo', { recursive: true });
+    fs.writeFileSync('foo/from-src1.txt', '');
     setTimeout(() => {
       fs.writeFileSync('./foo/src1.txt', '-SRC');
+
       // Task should run the first time
-      let out;
-      out = exec(`${JAKE_CMD} -q fileTest:foo/from-src1.txt`).toString().trim();
-      assert.equal('fileTest:foo/from-src1.txt task', out);
+      let out = execJake('-q fileTest:foo/from-src1.txt');
+      assert.equal(out, 'fileTest:foo/from-src1.txt task');
+
       // Task should not run on subsequent invocation
-      out = exec(`${JAKE_CMD} -q fileTest:foo/from-src1.txt`).toString().trim();
-      assert.equal('', out);
+      out = execJake('-q fileTest:foo/from-src1.txt');
+      assert.equal(out, '');
+
       cleanUpAndNext(next);
     }, 1000);
   });
 
-  test('a preexisting file', function () {
-    let prereqData = 'howdy';
-    exec('mkdir -p ./foo');
-    fs.writeFileSync('foo/prereq.txt', prereqData);
-    let out;
-    out = exec(`${JAKE_CMD} -q fileTest:foo/from-prereq.txt`).toString().trim();
-    assert.equal('fileTest:foo/from-prereq.txt task', out);
-    let data = fs.readFileSync(process.cwd() + '/foo/from-prereq.txt');
-    assert.equal(prereqData, data.toString());
-    out = exec(`${JAKE_CMD} -q fileTest:foo/from-prereq.txt`).toString().trim();
-    // Second time should be a no-op
-    assert.equal('', out);
-    cleanUpAndNext();
-  });
+  suite('a preexisting file', function () {
+    const prereqData = 'howdy';
+
+    setup(function () {
+
+      // Set up the prerequisite file.
+      fs.mkdirSync('foo', { recursive: true });
+      fs.writeFileSync('foo/prereq.txt', prereqData);
+
+      // Run jake to generate the output.
+      const out = execJake('-q fileTest:foo/from-prereq.txt');
+      assert.equal(out, 'fileTest:foo/from-prereq.txt task');
+
+      // Ensure the prerequisite data was copied successfully.
+      const data = fs.readFileSync('foo/from-prereq.txt');
+      assert.equal(data.toString(), prereqData);
+
+    });
+
+    test('with no changes', function () {
+      const out = execJake('-q fileTest:foo/from-prereq.txt');
+      // Second time should be a no-op
+      assert.equal(out, '');
+      cleanUpAndNext();
+    });
+
+    test('with --always-make flag', function () {
+      const out = execJake('-q -B fileTest:foo/from-prereq.txt');
+      assert.equal(out, 'fileTest:foo/from-prereq.txt task');
+      cleanUpAndNext();
+    });
 
-  test('a preexisting file with --always-make flag', function () {
-    let prereqData = 'howdy';
-    exec('mkdir -p ./foo');
-    fs.writeFileSync('foo/prereq.txt', prereqData);
-    let out;
-    out = exec(`${JAKE_CMD} -q fileTest:foo/from-prereq.txt`).toString().trim();
-    assert.equal('fileTest:foo/from-prereq.txt task', out);
-    let data = fs.readFileSync(process.cwd() + '/foo/from-prereq.txt');
-    assert.equal(prereqData, data.toString());
-    out = exec(`${JAKE_CMD} -q -B fileTest:foo/from-prereq.txt`).toString().trim();
-    assert.equal('fileTest:foo/from-prereq.txt task', out);
-    cleanUpAndNext();
   });
 
   test('nested directory-task', function () {
-    exec(`${JAKE_CMD} -q fileTest:foo/bar/baz/bamf.txt`);
-    let data = fs.readFileSync(process.cwd() + '/foo/bar/baz/bamf.txt');
-    assert.equal('w00t', data);
+    execJake('-q fileTest:foo/bar/baz/bamf.txt');
+    let data = fs.readFileSync('foo/bar/baz/bamf.txt');
+    assert.equal(data, 'w00t');
     cleanUpAndNext();
   });
 
diff --git a/test/integration/helpers.js b/test/integration/helpers.js
index 9caaa4e7..654041cb 100644
--- a/test/integration/helpers.js
+++ b/test/integration/helpers.js
@@ -1,64 +1,75 @@
-var exec = require('child_process').exec;
-
-var helpers = new (function () {
-  var _tests;
-  var _names = [];
-  var _name;
-  var _callback;
-  var _runner = function () {
+const { join, normalize } = require("path");
+const os = require("os");
+const assert = require("assert");
+const { existsSync, statSync } = require('fs');
+const { exec, execFileSync, spawnSync, execSync } = require("child_process");
+const fs = require("fs");
+
+const jakeCliPath = normalize(join(__dirname, '..', '..', 'bin', 'cli.js'));
+
+const helpers = new (function () {
+  let _tests;
+  let _names = [];
+  let _name;
+  let _callback;
+  const _runner = function () {
     if ((_name = _names.shift())) {
       console.log('Running ' + _name);
       _tests[_name]();
-    }
-    else {
+    } else {
       _callback();
     }
   };
 
   this.exec = function () {
-    var args = Array.prototype.slice.call(arguments);
-    var arg;
-    var cmd = args.shift();
-    var opts = {};
-    var callback;
+    const args = Array.prototype.slice.call(arguments);
+    let arg;
+    let cmd = args.shift();
+    let opts = {};
+    let callback;
     // Optional opts/callback or callback/opts
     while ((arg = args.shift())) {
       if (typeof arg == 'function') {
         callback = arg;
-      }
-      else {
+      } else {
         opts = arg;
       }
     }
 
     cmd += ' --trace';
-    var execOpts = opts.execOpts ? opts.execOpts : {};
+    const execOpts = 'execOpts' in opts ? opts.execOpts : {};
     exec(cmd, execOpts, function (err, stdout, stderr) {
-      var out = helpers.trim(stdout);
+      const out = helpers.trim(stdout);
       if (err) {
         if (opts.breakOnError === false) {
           return callback(err);
-        }
-        else {
+        } else {
           throw err;
         }
       }
       if (stderr) {
         callback(stderr);
-      }
-      else {
+      } else {
         callback(out);
       }
     });
   };
 
+  this.jakeCliPath = jakeCliPath;
+  this.execJake = function (args, opts = {}) {
+    return execSync(`node ${jakeCliPath} ${args}`, opts).toString().trim();
+  };
+  this.spawnJake = function (args, opts = {}) {
+    return spawnSync('node', [ jakeCliPath, ...args ], opts);
+  };
+
   this.trim = function (s) {
-    var str = s || '';
+    const str = s || '';
     return str.replace(/^\s*|\s*$/g, '');
   };
 
   this.parse = function (s) {
-    var str = s || '';
+    let str = s || '';
     str = helpers.trim(str);
     str = str.replace(/'/g, '"');
     return JSON.parse(str);
@@ -75,6 +86,109 @@ var helpers = new (function () {
     _runner();
   };
 
+  /** Safely and human-readably checks the octal mode of a file */
+  this.assertFileMode = function (filePath, expected, message) {
+
+    // Ensure the target file actually exists, then get the stats.
+    const fileStat = statSync(filePath);
+    assert.ok(existsSync(filePath));
+
+    // Bitmask and convert the file mode to an octal string.
+    const actualOctal = (fileStat.mode & 0o777).toString(8);
+
+    // Convert to octal string if needed.
+    // If windows, '666' is always expected.
+    const expectedOctal
+      = (os.type() !== 'Windows_NT'
+        ? (typeof expected === 'number'
+          ? expected.toString(8)
+          : expected)
+        : '666');
+
+    // Actually compare the results.
+    assert.strictEqual(actualOctal, expectedOctal, message);
+
+    // Return the file stats for if they're needed later.
+    return fileStat;
+
+  };
+
+  /**
+   * Triggers the skipping of a given test if the current system is Windows,
+   * and the process is not in an elevated state.
+   * @param test The test that requires elevation to run.
+   */
+  this.testRequiresWindowsElevation = function (test) {
+    if (os.type() !== 'Windows_NT') {
+      // No need to check unless running windows.
+      return;
+    }
+    try {
+      execFileSync('net', ['session'], {
+        'stdio': 'ignore',
+      });
+    } catch (error) {
+      test.skip(error);
+    }
+  };
+
+
+  /**
+   * Recursively and forcefully deletes a list of directories, before
+   * re-creating them recursively if specified.
+   *
+   * The input arguments are handled in sequence, where directory creation only
+   * occurs after deletion if either a mode number or `true` boolean have been
+   * provided earlier in the args. If a false is provided, subsequently
+   * specified directories will not be re-created.
+   *
+   * The deletion and creation are done as separate iterations to avoid any
+   * interference between the two actions in case any list items overlap.
+   *
+   * This function should be used at the end of a test to clean up only if the
+   * test is successful. Otherwise, it should be called at the start or in a
+   * setup function to ensure dirs are all in the right state.
+   * @param items {string|boolean|number}
+   *        The list of directories and any config modifiers.
+   */
+  this.ensureDirs = function (...items) {
+
+    // Remove all the directories first, to avoid messing up creation later.
+    for (const item of items) {
+      if (typeof item === 'string') {
+        fs.rmSync(item, { recursive: true, force: true });
+      }
+    }
+
+    let create = true;
+    let mode   = undefined;
+    for (const item of items) {
+
+      switch (typeof item) {
+
+      case 'number': {
+        create = true;
+        mode = item & 0o777;
+        break;
+      }
+
+      case 'boolean': {
+        create = item;
+        mode = undefined;
+        break;
+      }
+
+      case "string": {
+        if (create) {
+          fs.mkdirSync(item, {recursive: true, mode: mode});
+        }
+        break;
+      }
+
+      }
+    }
+  };
+
 })();
 
 module.exports = helpers;
diff --git a/test/integration/jakelib/concurrent.jake.js b/test/integration/jakelib/concurrent.jake.js
index 684c86f1..1ad3c606 100644
--- a/test/integration/jakelib/concurrent.jake.js
+++ b/test/integration/jakelib/concurrent.jake.js
@@ -1,8 +1,9 @@
+let { namespace, task } = require('../../../lib/jake');
 
 namespace('concurrent', function () {
   task('A', function () {
     console.log('Started A');
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         console.log('Finished A');
         resolve();
@@ -12,7 +13,7 @@ namespace('concurrent', function () {
 
   task('B', function () {
     console.log('Started B');
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         console.log('Finished B');
         resolve();
@@ -22,7 +23,7 @@ namespace('concurrent', function () {
 
   task('C', function () {
     console.log('Started C');
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         console.log('Finished C');
         resolve();
@@ -32,7 +33,7 @@ namespace('concurrent', function () {
 
   task('D', function () {
     console.log('Started D');
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         console.log('Finished D');
         resolve();
@@ -42,7 +43,7 @@ namespace('concurrent', function () {
 
   task('Ba', ['A'], function () {
     console.log('Started Ba');
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         console.log('Finished Ba');
         resolve();
@@ -52,7 +53,7 @@ namespace('concurrent', function () {
 
   task('Afail', function () {
     console.log('Started failing task');
-    return new Promise((resolve, reject) => {
+    return new Promise(() => {
       setTimeout(() => {
         console.log('Failing B with error');
         throw new Error('I failed');
@@ -61,7 +62,7 @@ namespace('concurrent', function () {
   });
 
   task('simple1', ['A','B'], {concurrency: 2}, function () {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, 50);
@@ -69,7 +70,7 @@ namespace('concurrent', function () {
   });
 
   task('simple2', ['C','D'], {concurrency: 2}, function () {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, 50);
@@ -77,7 +78,7 @@ namespace('concurrent', function () {
   });
 
   task('seqconcurrent', ['simple1','simple2'], function () {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, 50);
@@ -85,7 +86,7 @@ namespace('concurrent', function () {
   });
 
   task('concurrentconcurrent', ['simple1','simple2'], {concurrency: 2}, function () {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, 50);
@@ -93,7 +94,7 @@ namespace('concurrent', function () {
   });
 
   task('subdep', ['A','Ba'], {concurrency: 2}, function () {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, 50);
@@ -101,7 +102,7 @@ namespace('concurrent', function () {
   });
 
   task('fail', ['A', 'B', 'Afail'], {concurrency: 3}, function () {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       setTimeout(() => {
         resolve();
       }, 50);
diff --git a/test/integration/jakelib/publish.jake.js b/test/integration/jakelib/publish.jake.js
index f8485d1c..85017424 100644
--- a/test/integration/jakelib/publish.jake.js
+++ b/test/integration/jakelib/publish.jake.js
@@ -16,10 +16,8 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-
 let fs = require('fs');
-let { publishTask, rmRf, mkdirP } = require(`${PROJECT_DIR}/lib/jake`);
+let { publishTask, rmRf, mkdirP } = require(`../../../lib/jake`);
 
 fs.writeFileSync('package.json', '{"version": "0.0.1"}');
 mkdirP('tmp_publish');
diff --git a/test/integration/jakelib/required_module.jake.js b/test/integration/jakelib/required_module.jake.js
index eae666ba..65b4ffba 100644
--- a/test/integration/jakelib/required_module.jake.js
+++ b/test/integration/jakelib/required_module.jake.js
@@ -1,4 +1,4 @@
-let { task, namespace } = require(`${process.env.PROJECT_DIR}/lib/jake`);
+let { task, namespace } = require(`../../../lib/jake`);
 
 namespace('usingRequire', function () {
   task('test', () => {
diff --git a/test/integration/jakelib/rule.jake.js b/test/integration/jakelib/rule.jake.js
index 8e977dd9..836e3858 100644
--- a/test/integration/jakelib/rule.jake.js
+++ b/test/integration/jakelib/rule.jake.js
@@ -16,19 +16,17 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-
 let exec = require('child_process').execSync;
 let fs = require('fs');
 let util = require('util');
-let { rule, rmRf } = require(`${PROJECT_DIR}/lib/jake`);
+let { rule, rmRf } = require(`../../../lib/jake`);
 
 directory('tmpsrc');
 directory('tmpbin');
 
 ////////////////////////////////////////////////////////////
 // Simple Suffix Rule
-file('tmp', ['tmp_init', 'tmp_dep1.o', 'tmp_dep2.o'], function (params) {
+file('tmp', ['tmp_init', 'tmp_dep1.o', 'tmp_dep2.o'], function () {
   console.log('tmp task');
   let data1 = fs.readFileSync('tmp_dep1.o');
   let data2 = fs.readFileSync('tmp_dep2.o');
@@ -56,7 +54,7 @@ task('tmp_init', function () {
 
 ////////////////////////////////////////////////////////////
 // Pattern Rule
-file('tmp_p', ['tmp_init', 'tmp_dep1.oo', 'tmp_dep2.oo'], function (params) {
+file('tmp_p', ['tmp_init', 'tmp_dep1.oo', 'tmp_dep2.oo'], function () {
   console.log('tmp pattern task');
   let data1 = fs.readFileSync('tmp_dep1.oo');
   let data2 = fs.readFileSync('tmp_dep2.oo');
@@ -77,7 +75,7 @@ file('tmp_pf', [
   'tmp_src_init'
   , 'tmpbin'
   , 'tmpbin/tmp_dep1.oo'
-  , 'tmpbin/tmp_dep2.oo' ], function (params) {
+  , 'tmpbin/tmp_dep2.oo' ], function () {
   console.log('tmp pattern folder task');
   let data1 = fs.readFileSync('tmpbin/tmp_dep1.oo');
   let data2 = fs.readFileSync('tmpbin/tmp_dep2.oo');
diff --git a/test/integration/list_tasks.js b/test/integration/list_tasks.js
index c21d030d..dda0351c 100644
--- a/test/integration/list_tasks.js
+++ b/test/integration/list_tasks.js
@@ -1,15 +1,10 @@
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
-
-let assert = require('assert');
-let proc = require('child_process');
+let { doesNotThrow } = require('assert');
+let { execJake } = require('./helpers');
 
 suite('listTasks', function () {
+
   test('execute "jake -T" without any errors', function () {
-    let message = 'cannot run "jake -T" command';
-    let listTasks = function () {
-      proc.execFileSync(JAKE_CMD, ['-T']);
-    };
-    assert.doesNotThrow(listTasks, TypeError, message);
+    doesNotThrow(() => execJake('-T'), TypeError, 'cannot run "jake -T" command');
   });
+
 });
diff --git a/test/integration/publish_task.js b/test/integration/publish_task.js
index a941b30c..2c8b7b89 100644
--- a/test/integration/publish_task.js
+++ b/test/integration/publish_task.js
@@ -1,26 +1,27 @@
 let assert = require('assert');
-let exec = require('child_process').execSync;
-
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
+const { execJake, ensureDirs } = require('./helpers');
 
 suite('publishTask', function () {
 
   this.timeout(7000);
 
+  setup(function () {
+    ensureDirs(false, 'pkg', 'tmp_publish');
+  });
+
   test('default task', function () {
-    let out = exec(`${JAKE_CMD} -q publish`).toString().trim();
-    let expected = [
-      'Fetched remote tags.'
-      , 'On branch v0.0'
-      , 'Bumped version number to v0.0.2.'
-      , 'Created package for zerb v0.0.2'
-      , 'Publishing zerb v0.0.2'
-      , './pkg/zerb-v0.0.2.tar.gz'
-      , 'BOOM! Published.'
-      , 'Cleaned up package'
-    ].join('\n');
-    assert.equal(expected, out);
+    assert.equal(execJake('-q publish'), [
+      'Fetched remote tags.',
+      'On branch v0.0',
+      'Bumped version number to v0.0.2.',
+      'Created package for zerb v0.0.2',
+      'Publishing zerb v0.0.2',
+      './pkg/zerb-v0.0.2.tar.gz',
+      'BOOM! Published.',
+      'Cleaned up package',
+    ].join('\n'));
+
+    ensureDirs(false, 'pkg', 'tmp_publish');
   });
 
 });
diff --git a/test/integration/rule.js b/test/integration/rule.js
index 468db013..2959fd1b 100644
--- a/test/integration/rule.js
+++ b/test/integration/rule.js
@@ -16,14 +16,11 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
-
 let assert = require('assert');
-let exec = require('child_process').execSync;
 let fs = require('fs');
-let { Rule } = require(`${PROJECT_DIR}/lib/rule`);
-let { rmRf } = require(`${PROJECT_DIR}/lib/jake`);
+let { Rule } = require(`../../lib/rule`);
+let { rmRf } = require(`../../lib/jake`);
+let {execJake} = require('./helpers');
 
 let cleanUpAndNext = function (callback) {
   // Gotta add globbing to file utils rmRf
@@ -75,21 +72,21 @@ suite('rule', function () {
   });
 
   test('rule w/o pattern', function () {
-    let out = exec( `${JAKE_CMD} -q  tmp`).toString().trim();
+    let out = execJake('-q  tmp');
     let output = [
       "tmp_dep2.c task"
       , "tmp_dep1.c task"
       , "cp tmp_dep1.c tmp_dep1.o task"
       , "cp tmp_dep2.c tmp_dep2.o task"
       , "tmp task"];
-    assert.equal( output.join('\n'), out);
-    let data = fs.readFileSync(process.cwd() + '/tmp');
-    assert.equal('src_1src_2', data.toString());
+    assert.equal(out, output.join('\n'));
+    let data = fs.readFileSync('tmp');
+    assert.equal(data.toString(), 'src_1src_2');
     cleanUpAndNext();
   });
 
   test('rule w pattern w/o folder w/o namespace', function () {
-    let out = exec( `${JAKE_CMD}  -q  tmp_p`).toString().trim();
+    let out = execJake('-q  tmp_p');
     let output = [
       "tmp_dep2.c task"
       , "tmp_dep1.c task"
@@ -97,14 +94,14 @@ suite('rule', function () {
       , "cp tmp_dep2.c tmp_dep2.oo task"
       , "tmp pattern task"];
     let data;
-    assert.equal( output.join('\n'), out);
-    data = fs.readFileSync(process.cwd() + '/tmp_p');
-    assert.equal('src_1src_2 pattern', data.toString());
+    assert.equal(out, output.join('\n'));
+    data = fs.readFileSync('tmp_p');
+    assert.equal(data.toString(), 'src_1src_2 pattern');
     cleanUpAndNext();
   });
 
   test('rule w pattern w folder w/o namespace', function () {
-    let out = exec( `${JAKE_CMD}  -q  tmp_pf`).toString().trim();
+    let out = execJake(' -q  tmp_pf');
     let output = [
       "tmpsrc/tmp_dep1.c task"
       , "cp tmpsrc/tmp_dep1.c tmpbin/tmp_dep1.oo task"
@@ -112,14 +109,14 @@ suite('rule', function () {
       , "cp tmpsrc/tmp_dep2.c tmpbin/tmp_dep2.oo task"
       , "tmp pattern folder task"];
     let data;
-    assert.equal( output.join('\n'), out);
-    data = fs.readFileSync(process.cwd() + '/tmp_pf');
-    assert.equal('src/src_1src/src_2 pattern folder', data.toString());
+    assert.equal(out, output.join('\n'));
+    data = fs.readFileSync('tmp_pf');
+    assert.equal(data.toString(), 'src/src_1src/src_2 pattern folder');
     cleanUpAndNext();
   });
 
   test.skip('rule w pattern w folder w namespace', function () {
-    let out = exec( `${JAKE_CMD} -q   tmp_ns`).toString().trim();
+    let out = execJake('-q tmp_ns');
     let output = [
       "tmpsrc/file2.c init task" // yes
       , "tmpsrc/tmp_dep2.c task" // no
@@ -128,15 +125,14 @@ suite('rule', function () {
       , "cp tmpsrc/dep1.c tmpbin/dep1.oo ns task" // no
       , "cp tmpsrc/file2.c tmpbin/file2.oo ns task" // yes
       , "tmp pattern folder namespace task"]; // yes
-    let data;
-    assert.equal( output.join('\n'), out);
-    data = fs.readFileSync(process.cwd() + '/tmp_ns');
-    assert.equal('src/src_1src/src_2src/src_3 pattern folder namespace', data.toString());
+    assert.equal(output.join('\n'), out);
+    let data = fs.readFileSync(process.cwd() + '/tmp_ns');
+    assert.equal(data.toString(), 'src/src_1src/src_2src/src_3 pattern folder namespace');
     cleanUpAndNext();
   });
 
   test.skip('rule w chain w pattern w folder w namespace', function () {
-    let out = exec( `${JAKE_CMD} -q tmp_cr`).toString().trim();
+    let out = execJake('-q tmp_cr');
     let output = [
       "chainrule init task"
       , "cp tmpsrc/file1.tex tmpbin/file1.dvi tex->dvi task"
@@ -145,68 +141,58 @@ suite('rule', function () {
       , "cp tmpbin/file2.dvi tmpbin/file2.pdf dvi->pdf task"
       , "tmp chainrule namespace task"];
     let data;
-    assert.equal( output.join('\n'), out);
-    data = fs.readFileSync(process.cwd() + '/tmp_cr');
-    assert.equal('tex1 tex2  chainrule namespace', data.toString());
+    assert.equal(output.join('\n'), out);
+    data = fs.readFileSync('tmp_cr');
+    assert.equal(data.toString(), 'tex1 tex2  chainrule namespace');
     cleanUpAndNext();
   });
 
 
   ['precedence', 'regexPattern', 'sourceFunction'].forEach(function (key) {
 
-    test('rule with source file not created yet (' + key  + ')', function () {
+    test(`rule with source file not created yet (${key})`, function () {
       let write = process.stderr.write;
       process.stderr.write = () => {};
       rmRf('foo.txt', {silent: true});
       rmRf('foo.html', {silent: true});
-      try {
-        exec(`${JAKE_CMD}  ` + key + ':test');
-      }
-      catch(err) {
-        // foo.txt prereq doesn't exist yet
-        assert.ok(err.message.indexOf('Unknown task "foo.html"') > -1);
-      }
+      assert.throws(() => execJake(`${key}:test`), /Unknown task "foo.html"/);
       process.stderr.write = write;
     });
 
     test('rule with source file now created (' + key  + ')', function () {
       fs.writeFileSync('foo.txt', '');
-      let out = exec(`${JAKE_CMD} -q  ` + key + ':test').toString().trim();
+      let out = execJake(`-q ${key}:test`);
       // Should run prereq and test task
-      let output = [
-        'created html'
-        , 'ran test'
-      ];
-      assert.equal(output.join('\n'), out);
+      assert.equal(out, [
+        'created html',
+        'ran test',
+      ].join('\n'));
     });
 
-    test('rule with source file modified (' + key  + ')', function (next) {
+    test(`rule with source file modified (${key})`, function (next) {
       setTimeout(function () {
         fs.writeFileSync('foo.txt', '');
-        let out = exec(`${JAKE_CMD} -q  ` + key + ':test').toString().trim();
+        let out = execJake(`-q ${key}:test`);
         // Should again run both prereq and test task
-        let output = [
+        assert.equal(out, [
           'created html'
           , 'ran test'
-        ];
-        assert.equal(output.join('\n'), out);
+        ].join('\n'));
         //next();
         cleanUpAndNext(next);
       }, 1000); // Wait to do the touch to ensure mod-time is different
     });
 
-    test('rule with existing objective file and no source ' +
-        ' (should be normal file-task) (' + key  + ')', function () {
+    test(`rule with existing objective file and no source  (should be normal file-task) (${key})`, function () {
       // Remove just the source file
       fs.writeFileSync('foo.html', '');
       rmRf('foo.txt', {silent: true});
-      let out = exec(`${JAKE_CMD} -q  ` + key + ':test').toString().trim();
+      let out = execJake(`-q ${key}:test`);
       // Should treat existing objective file as plain file-task,
       // and just run test-task
-      let output = [
+      assert.equal(out, [
         'ran test'
-      ];
-      assert.equal(output.join('\n'), out);
+      ].join('\n'));
       cleanUpAndNext();
     });
 
diff --git a/test/integration/selfdep.js b/test/integration/selfdep.js
index 3195d08c..e817b8fd 100644
--- a/test/integration/selfdep.js
+++ b/test/integration/selfdep.js
@@ -1,8 +1,5 @@
 let assert = require('assert');
-let exec = require('child_process').execSync;
-
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
+const { execJake } = require('./helpers');
 
 suite('selfDep', function () {
 
@@ -20,21 +17,17 @@ suite('selfDep', function () {
   });
 
   test('self dep const', function () {
-    try {
-      exec(`${JAKE_CMD} selfdepconst`);
-    }
-    catch(e) {
-      assert(e.message.indexOf('dependency of itself') > -1);
-    }
+    assert.throws(
+      () => execJake('selfdepconst'),
+      (error) => error.message.indexOf('dependency of itself') > -1,
+    );
   });
 
   test('self dep dyn', function () {
-    try {
-      exec(`${JAKE_CMD} selfdepdyn`);
-    }
-    catch(e) {
-      assert(e.message.indexOf('dependency of itself') > -1);
-    }
+    assert.throws(
+      () => execJake('selfdepdyn'),
+      (error) => error.message.indexOf('dependency of itself') > -1,
+    );
   });
 
 });
diff --git a/test/integration/task_base.js b/test/integration/task_base.js
index 9aa501d7..9c7d3b7d 100644
--- a/test/integration/task_base.js
+++ b/test/integration/task_base.js
@@ -1,57 +1,51 @@
 let assert = require('assert');
-let h = require('./helpers');
-let exec = require('child_process').execSync;
-
-const PROJECT_DIR = process.env.PROJECT_DIR;
-const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
+let { execJake, spawnJake, parse } = require('./helpers');
 
 suite('taskBase', function () {
 
   this.timeout(7000);
 
   test('default task', function () {
-    let out;
-    out = exec(`${JAKE_CMD} -q`).toString().trim();
+    let out = execJake('-q');
     assert.equal(out, 'default task');
-    out = exec(`${JAKE_CMD} -q default`).toString().trim();
+    out = execJake(`-q default`);
     assert.equal(out, 'default task');
   });
 
   test('task with no action', function () {
-    let out = exec(`${JAKE_CMD} -q noAction`).toString().trim();
+    let out = execJake('-q noAction');
     assert.equal(out, 'default task');
   });
 
   test('a task with no action and no prereqs', function () {
-    exec(`${JAKE_CMD} noActionNoPrereqs`);
+    execJake('noActionNoPrereqs');
   });
 
   test('a task that exists at the top-level, and not in the specified namespace, should error', function () {
-    let res = require('child_process').spawnSync(`${JAKE_CMD}`,
-      ['asdfasdfasdf:zerbofrangazoomy']);
+    let res = spawnJake([ 'asdfasdfasdf:zerbofrangazoomy' ], { stdio: [ 'inherit', 'inherit', 'pipe' ] });
     let err = res.stderr.toString();
-    assert.ok(err.indexOf('Unknown task' > -1));
+    assert.ok(err.indexOf('Unknown task') > -1);
   });
 
   test('passing args to a task', function () {
-    let out = exec(`${JAKE_CMD} -q argsEnvVars[foo,bar]`).toString().trim();
-    let parsed = h.parse(out);
+    let out = execJake('-q argsEnvVars[foo,bar]');
+    let parsed = parse(out);
     let args = parsed.args;
     assert.equal(args[0], 'foo');
     assert.equal(args[1], 'bar');
   });
 
   test('a task with environment vars', function () {
-    let out = exec(`${JAKE_CMD} -q argsEnvVars foo=bar baz=qux`).toString().trim();
-    let parsed = h.parse(out);
+    let out = execJake('-q argsEnvVars foo=bar baz=qux');
+    let parsed = parse(out);
     let env = parsed.env;
     assert.equal(env.foo, 'bar');
     assert.equal(env.baz, 'qux');
   });
 
   test('passing args and using environment vars', function () {
-    let out = exec(`${JAKE_CMD} -q argsEnvVars[foo,bar] foo=bar baz=qux`).toString().trim();
-    let parsed = h.parse(out);
+    let out = execJake('-q argsEnvVars[foo,bar] foo=bar baz=qux');
+    let parsed = parse(out);
     let args = parsed.args;
     let env = parsed.env;
     assert.equal(args[0], 'foo');
@@ -61,107 +55,108 @@ suite('taskBase', function () {
   });
 
   test('a simple prereq', function () {
-    let out = exec(`${JAKE_CMD} -q foo:baz`).toString().trim();
-    assert.equal(out, 'foo:bar task\nfoo:baz task');
+    let out = execJake('-q foo:baz');
+    assert.equal(out, [ 'foo:bar task', 'foo:baz task' ].join("\n"));
   });
 
   test('a duplicate prereq only runs once', function () {
-    let out = exec(`${JAKE_CMD} -q foo:asdf`).toString().trim();
-    assert.equal(out, 'foo:bar task\nfoo:baz task\nfoo:asdf task');
+    let out = execJake('-q foo:asdf');
+    assert.equal(out, [ 'foo:bar task', 'foo:baz task', 'foo:asdf task' ].join("\n"));
   });
 
   test('a prereq with command-line args', function () {
-    let out = exec(`${JAKE_CMD} -q foo:qux`).toString().trim();
-    assert.equal(out, 'foo:bar[asdf,qwer] task\nfoo:qux task');
+    let out = execJake('-q foo:qux');
+    assert.equal(out, [ 'foo:bar[asdf,qwer] task', 'foo:qux task' ].join("\n"));
   });
 
   test('a prereq with args via invoke', function () {
-    let out = exec(`${JAKE_CMD} -q foo:frang[zxcv,uiop]`).toString().trim();
-    assert.equal(out, 'foo:bar[zxcv,uiop] task\nfoo:frang task');
+    let out = execJake('-q foo:frang[zxcv,uiop]');
+    assert.equal(out, [ 'foo:bar[zxcv,uiop] task', 'foo:frang task' ].join("\n"));
   });
 
   test('a prereq with args via execute', function () {
-    let out = exec(`${JAKE_CMD} -q foo:zerb[zxcv,uiop]`).toString().trim();
-    assert.equal(out, 'foo:bar[zxcv,uiop] task\nfoo:zerb task');
+    let out = execJake('-q foo:zerb[zxcv,uiop]');
+    assert.equal(out, [ 'foo:bar[zxcv,uiop] task', 'foo:zerb task' ].join("\n"));
   });
 
   test('repeating the task via execute', function () {
-    let out = exec(`${JAKE_CMD} -q foo:voom`).toString().trim();
-    assert.equal(out, 'foo:bar task\nfoo:bar task\ncomplete\ncomplete');
+    let out = execJake('-q foo:voom');
+    assert.equal(out, [ 'foo:bar task', 'foo:bar task', 'complete', 'complete' ].join("\n"));
   });
 
   test('prereq execution-order', function () {
-    let out = exec(`${JAKE_CMD} -q hoge:fuga`).toString().trim();
-    assert.equal(out, 'hoge:hoge task\nhoge:piyo task\nhoge:fuga task');
+    let out = execJake('-q hoge:fuga');
+    assert.equal(out, [ 'hoge:hoge task', 'hoge:piyo task', 'hoge:fuga task' ].join("\n"));
   });
 
   test('basic async task', function () {
-    let out = exec(`${JAKE_CMD} -q bar:bar`).toString().trim();
-    assert.equal(out, 'bar:foo task\nbar:bar task');
+    let out = execJake('-q bar:bar');
+    assert.equal(out, [ 'bar:foo task', 'bar:bar task' ].join("\n"));
   });
 
   test('promise async task', function () {
-    let out = exec(`${JAKE_CMD} -q bar:dependOnpromise`).toString().trim();
-    assert.equal(out, 'bar:promise task\nbar:dependOnpromise task saw value 123654');
+    let out = execJake('-q bar:dependOnpromise');
+    assert.equal(out, [ 'bar:promise task', 'bar:dependOnpromise task saw value 123654' ].join("\n"));
   });
 
   test('failing promise async task', function () {
-    try {
-      exec(`${JAKE_CMD} -q bar:brokenPromise`);
-    }
-    catch(e) {
-      assert(e.message.indexOf('Command failed') > -1);
-    }
+    assert.throws(() => execJake('-q bar:brokenPromise'), /Command failed/);
   });
 
   test('that current-prereq index gets reset', function () {
-    let out = exec(`${JAKE_CMD} -q hoge:kira`).toString().trim();
-    assert.equal(out, 'hoge:hoge task\nhoge:piyo task\nhoge:fuga task\n' +
-        'hoge:charan task\nhoge:gero task\nhoge:kira task');
+    let out = execJake('-q hoge:kira');
+    assert.equal(out, [
+      'hoge:hoge task',
+      'hoge:piyo task',
+      'hoge:fuga task',
+      'hoge:charan task',
+      'hoge:gero task',
+      'hoge:kira task',
+    ].join("\n"));
   });
 
   test('modifying a task by adding prereq during execution', function () {
-    let out = exec(`${JAKE_CMD} -q voom`).toString().trim();
+    let out = execJake('-q voom');
     assert.equal(out, 2);
   });
 
+  test('listening for task error', function () {
+    assert.throws(() => execJake('vronk:zong'), /OMFGZONG/);
+  });
+
   test('listening for task error-event', function () {
-    try {
-      exec(`${JAKE_CMD} -q vronk:groo`).toString().trim();
-    }
-    catch(e) {
-      assert(e.message.indexOf('OMFGZONG') > -1);
-    }
+    const out = execJake('vronk:groo');
+    assert.match(out, /OMFGZONG/);
   });
 
   test('listening for jake error-event', function () {
-    let out = exec(`${JAKE_CMD} -q throwy`).toString().trim();
-    assert(out.indexOf('Emitted\nError: I am bad') > -1);
+    let out = execJake('-q throwy');
+    assert.match(out, /Emitted\nError: I am bad/);
   });
 
   test('listening for jake unhandledRejection-event', function () {
-    let out = exec(`${JAKE_CMD} -q promiseRejecter`).toString().trim();
+    let out = execJake('-q promiseRejecter');
     assert.equal(out, '<promise rejected on purpose>');
   });
 
   test('large number of same prereqs', function () {
-    let out = exec(`${JAKE_CMD} -q large:same`).toString().trim();
-    assert.equal(out, 'large:leaf\nlarge:same');
+    let out = execJake('-q large:same');
+    assert.equal(out, [ 'large:leaf', 'large:same' ].join("\n"));
   });
 
   test('large number of different prereqs', function () {
-    let out = exec(`${JAKE_CMD} -q large:different`).toString().trim();
-    assert.equal(out, 'leaf-12\nleaf-123\nlarge:different');
+    let out = execJake('-q large:different');
+    assert.equal(out, [ 'leaf-12', 'leaf-123', 'large:different' ].join("\n"));
   });
 
   test('large number of different prereqs', function () {
-    let out = exec(`${JAKE_CMD} -q usingRequire:test`).toString().trim();
+    let out = execJake('-q usingRequire:test');
     assert.equal(out, 'howdy test');
   });
 
   test('modifying a namespace by adding a new task', function () {
-    let out = exec(`${JAKE_CMD} -q one:two`).toString().trim();
-    assert.equal('one:one\none:two', out);
+    let out = execJake('-q one:two');
+    assert.equal(out, [ 'one:one', 'one:two' ].join("\n"));
   });
 
 });
diff --git a/test/unit/jakefile.js b/test/unit/jakefile.js
index 89ff5233..254dc46e 100644
--- a/test/unit/jakefile.js
+++ b/test/unit/jakefile.js
@@ -1,3 +1,4 @@
+let { task, namespace } = require('../../lib/jake');
 
 task('foo', function () {
   console.log('ran top-level foo');
diff --git a/test/unit/namespace.js b/test/unit/namespace.js
index c6b3ff56..9c845e06 100644
--- a/test/unit/namespace.js
+++ b/test/unit/namespace.js
@@ -16,11 +16,9 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-
 // Load the jake global
-require(`${PROJECT_DIR}/lib/jake`);
-let { Namespace } = require(`${PROJECT_DIR}/lib/namespace`);
+let { namespace } = require('../../lib/jake');
+let { Namespace } = require('../../lib/namespace');
 
 require('./jakefile');
 
diff --git a/test/unit/parseargs.js b/test/unit/parseargs.js
index 7a3ddd5a..1a307553 100644
--- a/test/unit/parseargs.js
+++ b/test/unit/parseargs.js
@@ -16,9 +16,7 @@
  *
 */
 
-const PROJECT_DIR = process.env.PROJECT_DIR;
-
-let parseargs = require(`${PROJECT_DIR}/lib/parseargs`);
+let parseargs = require('../../lib/parseargs');
 let assert = require('assert');
 let optsReg = [
   { full: 'directory',