diff --git a/test/fixtures/basic.d.ts b/test/fixtures/basic.d.ts
deleted file mode 100644
index db97414..0000000
--- a/test/fixtures/basic.d.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export {};
-//# sourceMappingURL=basic.d.ts.map
\ No newline at end of file
diff --git a/test/fixtures/basic.d.ts.map b/test/fixtures/basic.d.ts.map
deleted file mode 100644
index 3f98104..0000000
--- a/test/fixtures/basic.d.ts.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"basic.d.ts","sourceRoot":"","sources":["basic.ts"],"names":[],"mappings":""}
\ No newline at end of file
diff --git a/test/fixtures/basic.js b/test/fixtures/basic.js
index 556058e..ef27401 100644
--- a/test/fixtures/basic.js
+++ b/test/fixtures/basic.js
@@ -78,4 +78,3 @@ switch (process.argv[2]) {
         parentMain();
         break;
 }
-//# sourceMappingURL=basic.js.map
\ No newline at end of file
diff --git a/test/fixtures/basic.js.map b/test/fixtures/basic.js.map
deleted file mode 100644
index f8a2cfa..0000000
--- a/test/fixtures/basic.js.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"basic.js","sourceRoot":"","sources":["basic.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,MAAM,EAAE,MAAM,aAAa,CAAA;AACpC,OAAO,EAAE,aAAa,EAAE,MAAM,KAAK,CAAA;AACnC,OAAO,EAAE,eAAe,EAAgB,MAAM,yBAAyB,CAAA;AAEvE,MAAM,UAAU,GAAG,aAAa,CAAC,MAAM,CAAC,IAAI,CAAC,GAAG,CAAC,CAAA;AAEjD,MAAM,SAAS,GAAG,GAAG,EAAE;IACrB,UAAU,CAAC,GAAG,EAAE,GAAE,CAAC,EAAE,IAAI,CAAC,CAAA;IAC1B,OAAO,CAAC,GAAG,CAAC,QAAQ,CAAC,CAAA;IACrB,QAAQ,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE;QACvB,KAAK,SAAS,CAAC;QACf,KAAK,QAAQ,CAAC;QACd,KAAK,SAAS;YACZ,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,GAAG,EAAE,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAA;YAC1C,MAAK;QAEP,KAAK,GAAG,CAAC;QACT,KAAK,GAAG,CAAC;QACT,KAAK,GAAG;YACN,OAAO,OAAO,CAAC,IAAI,CAAC,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAA;QAEvC,KAAK,KAAK;YACR,OAAO,CAAC,EAAE,CAAC,SAAS,EAAE,CAAC,CAAC,EAAE;gBACxB,IAAI,CAAC,OAAO,CAAC,IAAI,EAAE;oBACjB,MAAM,IAAI,KAAK,CAAC,2BAA2B,CAAC,CAAA;iBAC7C;gBACD,OAAO,CAAC,GAAG,CAAC,kBAAkB,CAAC,CAAA;gBAC/B,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAA;gBACf,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAA;YACjB,CAAC,CAAC,CAAA;YACF,MAAK;KACR;AACH,CAAC,CAAA;AAED,MAAM,UAAU,GAAG,GAAG,EAAE;IACtB,IAAI,EAAE,GAAwB,SAAS,CAAA;IAEvC,gDAAgD;IAChD,sDAAsD;IACtD,QAAQ,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE;QACvB,KAAK,mBAAmB;YACtB,EAAE,GAAG,QAAQ,CAAC,EAAE;gBACd,MAAM,gBAAgB,GAAG,MAAM,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAA;gBAChD,IAAI,gBAAgB,KAAK,QAAQ,EAAE;oBACjC,OAAO,CAAC,GAAG,CAAC,sBAAsB,EAAE,gBAAgB,EAAE,QAAQ,CAAC,CAAA;iBAChE;gBAED,OAAO,CAAC,GAAG,CAAC,mBAAmB,CAAC,CAAA;YAClC,CAAC,CAAA;YACD,MAAK;QACP,KAAK,oBAAoB;YACvB,EAAE,GAAG,KAAK,EAAC,QAAQ,EAAC,EAAE;gBACpB,MAAM,gBAAgB,GAAG,MAAM,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAA;gBAChD,IAAI,gBAAgB,KAAK,QAAQ,EAAE;oBACjC,OAAO,CAAC,GAAG,CAAC,sBAAsB,EAAE,gBAAgB,EAAE,QAAQ,CAAC,CAAA;iBAChE;gBAED,OAAO,CAAC,GAAG,CAAC,oBAAoB,CAAC,CAAA;YACnC,CAAC,CAAA;YACD,MAAK;KACR;IAED,MAAM,OAAO,GAAG,OAAO,CAAC,QAAQ,CAAA;IAChC,MAAM,IAAI,GAAG,CAAC,UAAU,EAAE,OAAO,CAAC,CAAC,MAAM,CAAC,OAAO,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,CAAA;IAChE,MAAM,KAAK,GAAG,eAAe,CAAC,OAAO,EAAE,IAAI,EAAE,EAAE,CAAC,CAAA;IAEhD,IAAI,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,KAAK,QAAQ,EAAE;QAChC,MAAM,CAAC,GAAG,EAAE,CAAC,OAAO,CAAC,GAAG,CAAC,aAAa,CAAC,CAAC,CAAA;QACxC,QAAQ,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE;YACvB,KAAK,QAAQ;gBACX,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,GAAG,EAAE,SAAS,CAAC,CAAA;gBACpC,UAAU,CAAC,GAAG,EAAE,GAAE,CAAC,EAAE,GAAG,CAAC,CAAA;gBACzB,MAAK;YACP,KAAK,OAAO;gBACV,OAAO,CAAC,IAAI,CAAC,KAAK,CAAC,GAAa,EAAE,SAAS,CAAC,CAAA;gBAC5C,UAAU,CAAC,GAAG,EAAE,GAAE,CAAC,EAAE,GAAG,CAAC,CAAA;gBACzB,MAAK;YACP;gBACE,OAAO,OAAO,CAAC,IAAI,EAAE,CAAA;SACxB;KACF;AACH,CAAC,CAAA;AAED,QAAQ,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE;IACvB,KAAK,OAAO;QACV,SAAS,EAAE,CAAA;QACX,MAAK;IACP,KAAK,QAAQ;QACX,UAAU,EAAE,CAAA;QACZ,MAAK;CACR","sourcesContent":["import { onExit } from 'signal-exit'\nimport { fileURLToPath } from 'url'\nimport { foregroundChild, type Cleanup } from '../../dist/esm/index.js'\n\nconst __filename = fileURLToPath(import.meta.url)\n\nconst childMain = () => {\n  setTimeout(() => {}, 1000)\n  console.log('stdout')\n  switch (process.argv[3]) {\n    case 'SIGTERM':\n    case 'SIGHUP':\n    case 'SIGKILL':\n      process.kill(process.pid, process.argv[3])\n      break\n\n    case '0':\n    case '1':\n    case '2':\n      return process.exit(+process.argv[3])\n\n    case 'ipc':\n      process.on('message', m => {\n        if (!process.send) {\n          throw new Error('lost process.send somehow')\n        }\n        console.log('message received')\n        process.send(m)\n        process.exit(0)\n      })\n      break\n  }\n}\n\nconst parentMain = () => {\n  let cb: Cleanup | undefined = undefined\n\n  // we can optionally assign a beforeExit handler\n  // to the foreground-child process; we should test it.\n  switch (process.argv[4]) {\n    case 'beforeExitHandler':\n      cb = exitCode => {\n        const expectedExitCode = Number(process.argv[3])\n        if (expectedExitCode !== exitCode) {\n          console.log('unexpected exit code', expectedExitCode, exitCode)\n        }\n\n        console.log('beforeExitHandler')\n      }\n      break\n    case 'promiseExitHandler':\n      cb = async exitCode => {\n        const expectedExitCode = Number(process.argv[3])\n        if (expectedExitCode !== exitCode) {\n          console.log('unexpected exit code', expectedExitCode, exitCode)\n        }\n\n        console.log('promiseExitHandler')\n      }\n      break\n  }\n\n  const program = process.execPath\n  const args = [__filename, 'child'].concat(process.argv.slice(3))\n  const child = foregroundChild(program, args, cb)\n\n  if (process.argv[3] === 'onExit') {\n    onExit(() => console.log('parent exit'))\n    switch (process.argv[4]) {\n      case 'parent':\n        process.kill(process.pid, 'SIGTERM')\n        setTimeout(() => {}, 200)\n        break\n      case 'child':\n        process.kill(child.pid as number, 'SIGTERM')\n        setTimeout(() => {}, 200)\n        break\n      default:\n        return process.exit()\n    }\n  }\n}\n\nswitch (process.argv[2]) {\n  case 'child':\n    childMain()\n    break\n  case 'parent':\n    parentMain()\n    break\n}\n"]}
\ No newline at end of file
diff --git a/test/fixtures/change-exit.d.ts b/test/fixtures/change-exit.d.ts
deleted file mode 100644
index b36f6cc..0000000
--- a/test/fixtures/change-exit.d.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export {};
-//# sourceMappingURL=change-exit.d.ts.map
\ No newline at end of file
diff --git a/test/fixtures/change-exit.d.ts.map b/test/fixtures/change-exit.d.ts.map
deleted file mode 100644
index 1dbf6f8..0000000
--- a/test/fixtures/change-exit.d.ts.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"change-exit.d.ts","sourceRoot":"","sources":["change-exit.ts"],"names":[],"mappings":""}
\ No newline at end of file
diff --git a/test/fixtures/change-exit.js b/test/fixtures/change-exit.js
index b46ab80..b03e61a 100644
--- a/test/fixtures/change-exit.js
+++ b/test/fixtures/change-exit.js
@@ -57,4 +57,3 @@ switch (process.argv[2]) {
         child(String(process.argv[3]));
         break;
 }
-//# sourceMappingURL=change-exit.js.map
\ No newline at end of file
diff --git a/test/fixtures/change-exit.js.map b/test/fixtures/change-exit.js.map
deleted file mode 100644
index 6e21ca6..0000000
--- a/test/fixtures/change-exit.js.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"change-exit.js","sourceRoot":"","sources":["change-exit.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,KAAK,EAAE,MAAM,eAAe,CAAA;AACrC,OAAO,EAAE,aAAa,EAAE,MAAM,KAAK,CAAA;AACnC,OAAO,EAAE,eAAe,EAAE,MAAM,yBAAyB,CAAA;AAEzD,MAAM,UAAU,GAAG,aAAa,CAAC,MAAM,CAAC,IAAI,CAAC,GAAG,CAAC,CAAA;AAEjD,MAAM,MAAM,GAAG,CAAC,SAAiB,EAAE,SAAiB,EAAE,KAAc,EAAE,EAAE;IACtE,MAAM,IAAI,GAAG,CAAC,UAAU,EAAE,OAAO,EAAE,MAAM,CAAC,SAAS,CAAC,CAAC,CAAA;IACrD,KAAK,CAAC,OAAO,CAAC,QAAQ,EAAE,IAAI,CAAC,CAAA;IAC7B,MAAM,KAAK,GAAG,QAAQ,CAAC,SAAS,EAAE,EAAE,CAAC,CAAA;IACrC,MAAM,MAAM,GAAG,CAAC,KAAK,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,CAAC,KAAK,EAAE,IAAI,CAAC,CAAC,CAAC,CAAC,CAAC,IAAI,EAAE,SAAS,CAAC,CAAA;IAChE,MAAM,MAAM,GACV,SAAS,KAAK,WAAW,CAAC,CAAC,CAAC,SAAS;QACrC,CAAC,CAAC,SAAS,KAAK,OAAO,CAAC,CAAC,CAAC,KAAK;YAC/B,CAAC,CAAC,CAAC,KAAK,CAAC,QAAQ,CAAC,SAAS,EAAE,EAAE,CAAC,CAAC,CAAC,CAAC,CAAC,QAAQ,CAAC,SAAS,EAAE,EAAE,CAAC;gBAC3D,CAAC,CAAE,SAA4B,CAAA;IAEjC,eAAe,CAAC,OAAO,CAAC,QAAQ,EAAE,IAAI,EAAE,CAAC,IAAI,EAAE,MAAM,EAAE,EAAE;QACvD,MAAM,gBAAgB,GACpB,MAAM,KAAK,KAAK,CAAC,CAAC,CAAC,CAAC,EAAE,EAAE,IAAI,CAAC;YAC7B,CAAC,CAAC,MAAM,KAAK,SAAS,CAAC,CAAC,CAAC,CAAC,IAAI,EAAE,MAAM,CAAC;gBACvC,CAAC,CAAC,OAAO,MAAM,KAAK,QAAQ,CAAC,CAAC,CAAC,CAAC,MAAM,EAAE,IAAI,CAAC;oBAC7C,CAAC,CAAC,CAAC,IAAI,EAAE,MAAM,CAAC,CAAA;QAClB,MAAM,MAAM,GAAG;YACb,SAAS,EAAE;gBACT,MAAM;gBACN,MAAM,EAAE,CAAC,IAAI,EAAE,MAAM,CAAC;aACvB;YACD,UAAU,EAAE;gBACV,MAAM,EAAE,gBAAgB;aACzB;YACD,MAAM;YACN,KAAK;SACN,CAAA;QACD,IAAI,MAAM,KAAK,KAAK;YAAE,UAAU,CAAC,GAAG,EAAE,CAAC,OAAO,CAAC,IAAI,CAAC,EAAE,CAAC,EAAE,GAAG,CAAC,CAAA;QAC7D,IAAI,KAAK,EAAE;YACT,OAAO,IAAI,OAAO,CAAgB,GAAG,CAAC,EAAE,CACtC,UAAU,CAAC,GAAG,EAAE;gBACd,OAAO,CAAC,GAAG,CAAC,IAAI,EAAE,MAAM,CAAC,CAAA;gBACzB,GAAG,CAAC,MAAM,CAAC,CAAA;YACb,CAAC,EAAE,EAAE,CAAC,CACP,CAAA;SACF;aAAM;YACL,OAAO,CAAC,GAAG,CAAC,IAAI,EAAE,MAAM,CAAC,CAAA;YACzB,OAAO,MAAM,CAAA;SACd;IACH,CAAC,CAAC,CAAA;AACJ,CAAC,CAAA;AAED,MAAM,KAAK,GAAG,CAAC,IAAY,EAAE,EAAE;IAC7B,MAAM,KAAK,GAAG,QAAQ,CAAC,IAAI,EAAE,EAAE,CAAC,CAAA;IAChC,IAAI,CAAC,KAAK,CAAC,KAAK,CAAC;QAAE,OAAO,CAAC,IAAI,CAAC,KAAK,CAAC,CAAA;IACtC,MAAM,KAAK,GAAG,IAAsB,CAAA;IACpC,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,GAAG,EAAE,KAAK,CAAC,CAAA;IAChC,UAAU,CAAC,GAAG,EAAE,GAAE,CAAC,EAAE,GAAG,CAAC,CAAA;AAC3B,CAAC,CAAA;AAED,QAAQ,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE;IACvB,KAAK,QAAQ;QACX,MAAM,CACJ,MAAM,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,EACvB,MAAM,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,EACvB,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,KAAK,GAAG,CACxB,CAAA;QACD,MAAK;IACP,KAAK,OAAO;QACV,KAAK,CAAC,MAAM,CAAC,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAC,CAAA;QAC9B,MAAK;CACR","sourcesContent":["import { spawn } from 'child_process'\nimport { fileURLToPath } from 'url'\nimport { foregroundChild } from '../../dist/esm/index.js'\n\nconst __filename = fileURLToPath(import.meta.url)\n\nconst parent = (childExit: string, changeArg: string, defer: boolean) => {\n  const args = [__filename, 'child', String(childExit)]\n  spawn(process.execPath, args)\n  const asNum = parseInt(childExit, 10)\n  const expect = !isNaN(asNum) ? [asNum, null] : [null, childExit]\n  const change: number | undefined | false | NodeJS.Signals =\n    changeArg === 'undefined' ? undefined\n    : changeArg === 'false' ? false\n    : !isNaN(parseInt(changeArg, 10)) ? parseInt(changeArg, 10)\n    : (changeArg as NodeJS.Signals)\n\n  foregroundChild(process.execPath, args, (code, signal) => {\n    const parentExitExpect =\n      change === false ? [33, null]\n      : change === undefined ? [code, signal]\n      : typeof change === 'number' ? [change, null]\n      : [null, change]\n    const report = {\n      childExit: {\n        expect,\n        actual: [code, signal],\n      },\n      parentExit: {\n        expect: parentExitExpect,\n      },\n      change,\n      defer,\n    }\n    if (change === false) setTimeout(() => process.exit(33), 200)\n    if (defer) {\n      return new Promise<typeof change>(res =>\n        setTimeout(() => {\n          console.log('%j', report)\n          res(change)\n        }, 50),\n      )\n    } else {\n      console.log('%j', report)\n      return change\n    }\n  })\n}\n\nconst child = (exit: string) => {\n  const asNum = parseInt(exit, 10)\n  if (!isNaN(asNum)) process.exit(asNum)\n  const asSig = exit as NodeJS.Signals\n  process.kill(process.pid, asSig)\n  setTimeout(() => {}, 200)\n}\n\nswitch (process.argv[2]) {\n  case 'parent':\n    parent(\n      String(process.argv[3]),\n      String(process.argv[4]),\n      process.argv[5] === '1',\n    )\n    break\n  case 'child':\n    child(String(process.argv[3]))\n    break\n}\n"]}
\ No newline at end of file
diff --git a/test/fixtures/immortal-child.d.ts b/test/fixtures/immortal-child.d.ts
deleted file mode 100644
index 5916461..0000000
--- a/test/fixtures/immortal-child.d.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export {};
-//# sourceMappingURL=immortal-child.d.ts.map
\ No newline at end of file
diff --git a/test/fixtures/immortal-child.d.ts.map b/test/fixtures/immortal-child.d.ts.map
deleted file mode 100644
index 2b41e24..0000000
--- a/test/fixtures/immortal-child.d.ts.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"immortal-child.d.ts","sourceRoot":"","sources":["immortal-child.ts"],"names":[],"mappings":""}
\ No newline at end of file
diff --git a/test/fixtures/immortal-child.js b/test/fixtures/immortal-child.js
index 6ca6801..6b8e80f 100644
--- a/test/fixtures/immortal-child.js
+++ b/test/fixtures/immortal-child.js
@@ -31,4 +31,3 @@ switch (process.argv[2]) {
         parent();
         break;
 }
-//# sourceMappingURL=immortal-child.js.map
\ No newline at end of file
diff --git a/test/fixtures/immortal-child.js.map b/test/fixtures/immortal-child.js.map
deleted file mode 100644
index cc4e131..0000000
--- a/test/fixtures/immortal-child.js.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"immortal-child.js","sourceRoot":"","sources":["immortal-child.ts"],"names":[],"mappings":"AAAA,OAAO,OAAO,CAAC,GAAG,CAAC,WAAW,CAAA;AAC9B,OAAO,CAAC,GAAG,CAAC,QAAQ,GAAG,GAAG,CAAA;AAE1B,OAAO,EAAE,MAAM,EAAE,MAAM,aAAa,CAAA;AACpC,OAAO,EAAE,aAAa,EAAE,MAAM,KAAK,CAAA;AACnC,OAAO,EAAE,eAAe,EAAE,MAAM,yBAAyB,CAAA;AACzD,MAAM,UAAU,GAAG,aAAa,CAAC,MAAM,CAAC,IAAI,CAAC,GAAG,CAAC,CAAA;AAEjD,MAAM,MAAM,GAAG,GAAG,EAAE;IAClB,OAAO,CAAC,KAAK,CAAC,QAAQ,EAAE,OAAO,CAAC,GAAG,CAAC,CAAA;IACpC,eAAe,CAAC,OAAO,CAAC,QAAQ,EAAE,CAAC,UAAU,EAAE,OAAO,CAAC,CAAC,CAAA;AAC1D,CAAC,CAAA;AAED,MAAM,KAAK,GAAG,GAAG,EAAE;IACjB,OAAO,CAAC,KAAK,CAAC,OAAO,EAAE,OAAO,CAAC,GAAG,CAAC,CAAA;IACnC,WAAW,CAAC,GAAG,EAAE;QACf,OAAO,CAAC,GAAG,CAAC,aAAa,CAAC,CAAA;IAC5B,CAAC,EAAE,GAAG,CAAC,CAAA;IACP,OAAO,CAAC,EAAE,CAAC,QAAQ,EAAE,GAAG,EAAE;QACxB,OAAO,CAAC,GAAG,CAAC,uBAAuB,CAAC,CAAA;IACtC,CAAC,CAAC,CAAA;IACF,OAAO,CAAC,EAAE,CAAC,QAAQ,EAAE,GAAG,EAAE;QACxB,OAAO,CAAC,GAAG,CAAC,uBAAuB,CAAC,CAAA;IACtC,CAAC,CAAC,CAAA;IACF,MAAM,CAAC,CAAC,IAAI,EAAE,MAAM,EAAE,EAAE;QACtB,OAAO,CAAC,GAAG,CAAC,YAAY,EAAE,IAAI,EAAE,MAAM,CAAC,CAAA;IACzC,CAAC,CAAC,CAAA;AACJ,CAAC,CAAA;AAED,QAAQ,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE;IACvB,KAAK,OAAO;QACV,KAAK,EAAE,CAAA;QACP,MAAK;IACP,KAAK,QAAQ;QACX,MAAM,EAAE,CAAA;QACR,MAAK;CACR","sourcesContent":["delete process.env.FORCE_COLOR\nprocess.env.NO_COLOR = '1'\n\nimport { onExit } from 'signal-exit'\nimport { fileURLToPath } from 'url'\nimport { foregroundChild } from '../../dist/esm/index.js'\nconst __filename = fileURLToPath(import.meta.url)\n\nconst parent = () => {\n  console.error('parent', process.pid)\n  foregroundChild(process.execPath, [__filename, 'child'])\n}\n\nconst child = () => {\n  console.error('child', process.pid)\n  setInterval(() => {\n    console.log('child alive')\n  }, 200)\n  process.on('SIGINT', () => {\n    console.log('child SIGINT received')\n  })\n  process.on('SIGHUP', () => {\n    console.log('child SIGHUP received')\n  })\n  onExit((code, signal) => {\n    console.log('child exit', code, signal)\n  })\n}\n\nswitch (process.argv[2]) {\n  case 'child':\n    child()\n    break\n  case 'parent':\n    parent()\n    break\n}\n"]}
\ No newline at end of file
diff --git a/test/fixtures/tsconfig.json b/test/fixtures/tsconfig.json
index 1fcfc7e..a0f0c18 100644
--- a/test/fixtures/tsconfig.json
+++ b/test/fixtures/tsconfig.json
@@ -1,4 +1,11 @@
 {
   "extends": "../../tsconfig.json",
-  "include": ["./*.ts"]
+  "include": ["./*.ts"],
+  "compilerOptions": {
+    "inlineSources": false,
+    "inlineSourceMap": false,
+    "declaration": false,
+    "sourceMap": false,
+    "declarationMap": false
+  }
 }