25 files changed, 266 insertions, 327 deletions
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1b6e9ad22..e1a421f6a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -90,7 +90,7 @@ jobs:
         if: matrix.job == 'lint'
         uses: denoland/setup-deno@v1
         with:
-          deno-version: v1.19.3
+          deno-version: v1.x
 
       - name: Install Python
         uses: actions/setup-python@v1
diff --git a/cli/tests/integration/run_tests.rs b/cli/tests/integration/run_tests.rs
index c1ed59f14..a9e7d93cc 100644
--- a/cli/tests/integration/run_tests.rs
+++ b/cli/tests/integration/run_tests.rs
@@ -182,8 +182,9 @@ itest!(_044_bad_resource {
   exit_code: 1,
 });
 
+// TODO(bartlomieju): remove --unstable once Deno.spawn is stabilized
 itest!(_045_proxy {
-  args: "run -L debug --allow-net --allow-env --allow-run --allow-read --reload --quiet 045_proxy_test.ts",
+  args: "run -L debug --unstable --allow-net --allow-env --allow-run --allow-read --reload --quiet 045_proxy_test.ts",
   output: "045_proxy_test.ts.out",
   http_server: true,
 });
@@ -509,8 +510,9 @@ itest!(_088_dynamic_import_already_evaluating {
   output: "088_dynamic_import_already_evaluating.ts.out",
 });
 
+// TODO(bartlomieju): remove --unstable once Deno.spawn is stabilized
 itest!(_089_run_allow_list {
-  args: "run --allow-run=curl 089_run_allow_list.ts",
+  args: "run --unstable --allow-run=curl 089_run_allow_list.ts",
   output: "089_run_allow_list.ts.out",
 });
 
@@ -588,9 +590,10 @@ itest!(lock_write_requires_lock {
   exit_code: 1,
 });
 
+// TODO(bartlomieju): remove --unstable once Deno.spawn is stabilized
 itest!(lock_write_fetch {
   args:
-    "run --quiet --allow-read --allow-write --allow-env --allow-run lock_write_fetch.ts",
+    "run --quiet --allow-read --allow-write --allow-env --allow-run --unstable lock_write_fetch.ts",
   output: "lock_write_fetch.ts.out",
   http_server: true,
   exit_code: 0,
@@ -1861,12 +1864,14 @@ fn dont_cache_on_check_fail() {
 mod permissions {
   use test_util as util;
 
+  // TODO(bartlomieju): remove --unstable once Deno.spawn is stabilized
   #[test]
   fn with_allow() {
     for permission in &util::PERMISSION_VARIANTS {
       let status = util::deno_cmd()
         .current_dir(&util::testdata_path())
         .arg("run")
+        .arg("--unstable")
         .arg(format!("--allow-{0}", permission))
         .arg("permission_test.ts")
         .arg(format!("{0}Required", permission))
@@ -1878,12 +1883,13 @@ mod permissions {
     }
   }
 
+  // TODO(bartlomieju): remove --unstable once Deno.spawn is stabilized
   #[test]
   fn without_allow() {
     for permission in &util::PERMISSION_VARIANTS {
       let (_, err) = util::run_and_collect_output(
         false,
-        &format!("run permission_test.ts {0}Required", permission),
+        &format!("run --unstable permission_test.ts {0}Required", permission),
         None,
         None,
         false,
diff --git a/cli/tests/testdata/045_proxy_test.ts b/cli/tests/testdata/045_proxy_test.ts
index d6edf2be9..620e23e14 100644
--- a/cli/tests/testdata/045_proxy_test.ts
+++ b/cli/tests/testdata/045_proxy_test.ts
@@ -31,93 +31,76 @@ async function handler(req: Request): Promise<Response> {
 }
 
 async function testFetch() {
-  const c = Deno.run({
-    cmd: [
-      Deno.execPath(),
+  const { status } = await Deno.spawn(Deno.execPath(), {
+    args: [
       "run",
       "--quiet",
       "--reload",
       "--allow-net",
       "045_proxy_client.ts",
     ],
-    stdout: "piped",
     env: {
       HTTP_PROXY: `http://${addr}`,
     },
   });
 
-  const status = await c.status();
   assertEquals(status.code, 0);
-  c.close();
 }
 
 async function testModuleDownload() {
-  const http = Deno.run({
-    cmd: [
-      Deno.execPath(),
+  const { status } = await Deno.spawn(Deno.execPath(), {
+    args: [
       "cache",
       "--reload",
       "--quiet",
       "http://localhost:4545/045_mod.ts",
     ],
-    stdout: "piped",
     env: {
       HTTP_PROXY: `http://${addr}`,
     },
   });
 
-  const httpStatus = await http.status();
-  assertEquals(httpStatus.code, 0);
-  http.close();
+  assertEquals(status.code, 0);
 }
 
 async function testFetchNoProxy() {
-  const c = Deno.run({
-    cmd: [
-      Deno.execPath(),
+  const { status } = await Deno.spawn(Deno.execPath(), {
+    args: [
       "run",
       "--quiet",
       "--reload",
       "--allow-net",
       "045_proxy_client.ts",
     ],
-    stdout: "piped",
     env: {
       HTTP_PROXY: "http://not.exising.proxy.server",
       NO_PROXY: "localhost",
     },
   });
 
-  const status = await c.status();
   assertEquals(status.code, 0);
-  c.close();
 }
 
 async function testModuleDownloadNoProxy() {
-  const http = Deno.run({
-    cmd: [
-      Deno.execPath(),
+  const { status } = await Deno.spawn(Deno.execPath(), {
+    args: [
       "cache",
       "--reload",
       "--quiet",
       "http://localhost:4545/045_mod.ts",
     ],
-    stdout: "piped",
     env: {
       HTTP_PROXY: "http://not.exising.proxy.server",
       NO_PROXY: "localhost",
     },
   });
 
-  const httpStatus = await http.status();
-  assertEquals(httpStatus.code, 0);
-  http.close();
+  assertEquals(status.code, 0);
 }
 
 async function testFetchProgrammaticProxy() {
-  const c = Deno.run({
-    cmd: [
-      Deno.execPath(),
+  const { status } = await Deno.spawn(Deno.execPath(), {
+    args: [
       "run",
       "--quiet",
       "--reload",
@@ -125,11 +108,8 @@ async function testFetchProgrammaticProxy() {
       "--unstable",
       "045_programmatic_proxy_client.ts",
     ],
-    stdout: "piped",
   });
-  const status = await c.status();
   assertEquals(status.code, 0);
-  c.close();
 }
 
 proxyServer();
diff --git a/cli/tests/testdata/089_run_allow_list.ts b/cli/tests/testdata/089_run_allow_list.ts
index defb3196f..0eb79dcc2 100644
--- a/cli/tests/testdata/089_run_allow_list.ts
+++ b/cli/tests/testdata/089_run_allow_list.ts
@@ -1,13 +1,12 @@
 try {
-  Deno.run({
-    cmd: ["ls"],
-  });
+  await Deno.spawn("ls");
 } catch (e) {
   console.log(e);
 }
 
-const proc = Deno.run({
-  cmd: ["curl", "--help"],
+const { status } = await Deno.spawn("curl", {
+  args: ["--help"],
   stdout: "null",
+  stderr: "inherit",
 });
-console.log((await proc.status()).success);
+console.log(status.success);
diff --git a/cli/tests/testdata/lock_write_fetch.ts b/cli/tests/testdata/lock_write_fetch.ts
index b6ecf4747..7be6af84a 100644
--- a/cli/tests/testdata/lock_write_fetch.ts
+++ b/cli/tests/testdata/lock_write_fetch.ts
@@ -4,11 +4,10 @@ try {
   // pass
 }
 
-const fetchProc = Deno.run({
+const fetchProc = await Deno.spawn(Deno.execPath(), {
   stdout: "null",
   stderr: "null",
-  cmd: [
-    Deno.execPath(),
+  args: [
     "cache",
     "--reload",
     "--lock=lock_write_fetch.json",
@@ -18,14 +17,12 @@ const fetchProc = Deno.run({
   ],
 });
 
-const fetchCode = (await fetchProc.status()).code;
-console.log(`fetch code: ${fetchCode}`);
+console.log(`fetch code: ${fetchProc.status.code}`);
 
-const fetchCheckProc = Deno.run({
+const fetchCheckProc = await Deno.spawn(Deno.execPath(), {
   stdout: "null",
   stderr: "null",
-  cmd: [
-    Deno.execPath(),
+  args: [
     "cache",
     "--lock=lock_write_fetch.json",
     "--cert=tls/RootCA.pem",
@@ -33,16 +30,14 @@ const fetchCheckProc = Deno.run({
   ],
 });
 
-const fetchCheckProcCode = (await fetchCheckProc.status()).code;
-console.log(`fetch check code: ${fetchCheckProcCode}`);
+console.log(`fetch check code: ${fetchCheckProc.status.code}`);
 
 Deno.removeSync("./lock_write_fetch.json");
 
-const runProc = Deno.run({
+const runProc = await Deno.spawn(Deno.execPath(), {
   stdout: "null",
   stderr: "null",
-  cmd: [
-    Deno.execPath(),
+  args: [
     "run",
     "--lock=lock_write_fetch.json",
     "--lock-write",
@@ -52,7 +47,6 @@ const runProc = Deno.run({
   ],
 });
 
-const runCode = (await runProc.status()).code;
-console.log(`run code: ${runCode}`);
+console.log(`run code: ${runProc.status.code}`);
 
 Deno.removeSync("./lock_write_fetch.json");
diff --git a/cli/tests/testdata/no_prompt.ts b/cli/tests/testdata/no_prompt.ts
index f3d503f63..7f9750995 100644
--- a/cli/tests/testdata/no_prompt.ts
+++ b/cli/tests/testdata/no_prompt.ts
@@ -1,7 +1,10 @@
 new Worker("data:,setTimeout(() => Deno.exit(2), 200)", { type: "module" });
 
 try {
-  await Deno.run({ cmd: ["ps"] });
+  await Deno.spawn("ps", {
+    stdout: "inherit",
+    stderr: "inherit",
+  });
 } catch {
   Deno.exit(0);
 }
diff --git a/cli/tests/testdata/permission_test.ts b/cli/tests/testdata/permission_test.ts
index a3a38f2a0..4b186a0a2 100644
--- a/cli/tests/testdata/permission_test.ts
+++ b/cli/tests/testdata/permission_test.ts
@@ -15,13 +15,10 @@ const test: { [key: string]: (...args: any[]) => void | Promise<void> } = {
   netRequired() {
     Deno.listen({ transport: "tcp", port: 4541 });
   },
-  runRequired() {
-    const p = Deno.run({
-      cmd: Deno.build.os === "windows"
-        ? ["cmd.exe", "/c", "echo hello"]
-        : ["printf", "hello"],
+  async runRequired() {
+    await Deno.spawn(Deno.build.os === "windows" ? "cmd.exe" : "printf", {
+      args: Deno.build.os === "windows" ? ["/c", "echo hello"] : ["hello"],
     });
-    p.close();
   },
 };
 
diff --git a/cli/tests/unit/chown_test.ts b/cli/tests/unit/chown_test.ts
index 7a282d68b..b9d40f525 100644
--- a/cli/tests/unit/chown_test.ts
+++ b/cli/tests/unit/chown_test.ts
@@ -5,21 +5,17 @@ import { assertEquals, assertRejects, assertThrows } from "./test_util.ts";
 
 async function getUidAndGid(): Promise<{ uid: number; gid: number }> {
   // get the user ID and group ID of the current process
-  const uidProc = Deno.run({
-    stdout: "piped",
-    cmd: ["id", "-u"],
+  const uidProc = await Deno.spawn("id", {
+    args: ["-u"],
   });
-  const gidProc = Deno.run({
-    stdout: "piped",
-    cmd: ["id", "-g"],
+  const gidProc = await Deno.spawn("id", {
+    args: ["-g"],
   });
 
-  assertEquals((await uidProc.status()).code, 0);
-  assertEquals((await gidProc.status()).code, 0);
-  const uid = parseInt(new TextDecoder("utf-8").decode(await uidProc.output()));
-  uidProc.close();
-  const gid = parseInt(new TextDecoder("utf-8").decode(await gidProc.output()));
-  gidProc.close();
+  assertEquals(uidProc.status.code, 0);
+  assertEquals(gidProc.status.code, 0);
+  const uid = parseInt(new TextDecoder("utf-8").decode(uidProc.stdout));
+  const gid = parseInt(new TextDecoder("utf-8").decode(gidProc.stdout));
 
   return { uid, gid };
 }
diff --git a/cli/tests/unit/flock_test.ts b/cli/tests/unit/flock_test.ts
index 8ebda3f6c..3c73d0481 100644
--- a/cli/tests/unit/flock_test.ts
+++ b/cli/tests/unit/flock_test.ts
@@ -1,6 +1,5 @@
 // Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
 import { assertEquals } from "./test_util.ts";
-import { readAll } from "../../../test_util/std/io/util.ts";
 
 Deno.test(
   { permissions: { read: true, run: true, hrtime: true } },
@@ -103,8 +102,8 @@ async function checkFirstBlocksSecond(opts: {
     const secondPsTimes = await secondProcess.getTimes();
     return firstPsTimes.exitTime < secondPsTimes.enterTime;
   } finally {
-    firstProcess.close();
-    secondProcess.close();
+    await firstProcess.close();
+    await secondProcess.close();
   }
 }
 
@@ -149,14 +148,21 @@ function runFlockTestProcess(opts: { exclusive: boolean; sync: boolean }) {
     console.log(JSON.stringify({ enterTime, exitTime }));
 `;
 
-  const process = Deno.run({
-    cmd: [Deno.execPath(), "eval", "--unstable", scriptText],
-    stdout: "piped",
+  const process = Deno.spawnChild(Deno.execPath(), {
+    args: ["eval", "--unstable", scriptText],
     stdin: "piped",
   });
 
-  const waitSignal = () => process.stdout.read(new Uint8Array(1));
-  const signal = () => process.stdin.write(new Uint8Array(1));
+  const waitSignal = async () => {
+    const reader = process.stdout.getReader({ mode: "byob" });
+    await reader.read(new Uint8Array(1));
+    reader.releaseLock();
+  };
+  const signal = async () => {
+    const writer = process.stdin.getWriter();
+    await writer.write(new Uint8Array(1));
+    writer.releaseLock();
+  };
 
   return {
     async waitStartup() {
@@ -174,17 +180,16 @@ function runFlockTestProcess(opts: { exclusive: boolean; sync: boolean }) {
       await waitSignal();
     },
     getTimes: async () => {
-      const outputBytes = await readAll(process.stdout);
-      const text = new TextDecoder().decode(outputBytes);
+      const { stdout } = await process.output();
+      const text = new TextDecoder().decode(stdout);
       return JSON.parse(text) as {
         enterTime: number;
         exitTime: number;
       };
     },
-    close: () => {
-      process.stdout.close();
-      process.stdin.close();
-      process.close();
+    close: async () => {
+      await process.status;
+      await process.stdin.close();
     },
   };
 }
diff --git a/cli/tests/unit/http_test.ts b/cli/tests/unit/http_test.ts
index 2a4b7df01..779f11e56 100644
--- a/cli/tests/unit/http_test.ts
+++ b/cli/tests/unit/http_test.ts
@@ -1165,11 +1165,13 @@ Deno.test(
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = ["curl", "-X", "DELETE", url];
-      const proc = Deno.run({ cmd, stdout: "null", stderr: "null" });
-      const status = await proc.status();
+      const args = ["-X", "DELETE", url];
+      const { status } = await Deno.spawn("curl", {
+        args,
+        stdout: "null",
+        stderr: "null",
+      });
       assert(status.success);
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1277,8 +1279,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1287,13 +1288,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(output.includes("content-encoding: gzip\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1327,8 +1329,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "--request",
         "GET",
         "--url",
@@ -1336,10 +1337,10 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const proc = Deno.spawnChild("curl", { args, stderr: "null" });
+      const status = await proc.status;
       assert(status.success);
-      const stdout = proc.stdout!.readable
+      const stdout = proc.stdout
         .pipeThrough(new DecompressionStream("gzip"))
         .pipeThrough(new TextDecoderStream());
       let body = "";
@@ -1347,7 +1348,6 @@ Deno.test({
         body += chunk;
       }
       assertEquals(JSON.parse(body), data);
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1382,8 +1382,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1392,13 +1391,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output()).toLocaleLowerCase();
+      const output = decoder.decode(stdout).toLocaleLowerCase();
       assert(output.includes("vary: accept-encoding\r\n"));
       assert(!output.includes("content-encoding: "));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1436,8 +1436,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1446,13 +1445,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip;q=0.8, br;q=1.0, *;q=0.1",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(output.includes("content-encoding: br\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1487,8 +1487,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1497,13 +1496,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding, Accept\r\n"));
       assert(output.includes("content-encoding: gzip\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1541,7 +1541,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
+      const args = [
         "curl",
         "-i",
         "--request",
@@ -1551,16 +1551,17 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(
         output.includes("etag: W/33a64df551425fcc55e4d42a148795d9f25f89d4\r\n"),
       );
       assert(output.includes("content-encoding: gzip\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1598,8 +1599,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1608,16 +1608,17 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(
         output.includes("etag: W/33a64df551425fcc55e4d42a148795d9f25f89d4\r\n"),
       );
       assert(output.includes("content-encoding: gzip\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1655,8 +1656,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1665,13 +1665,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(!output.includes("content-encoding: "));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1709,8 +1710,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1719,13 +1719,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(!output.includes("content-encoding: "));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1768,7 +1769,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
+      const args = [
         "curl",
         "-i",
         "--request",
@@ -1778,13 +1779,14 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(output.includes("content-encoding: gzip\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1827,8 +1829,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "--request",
         "GET",
         "--url",
@@ -1836,10 +1837,10 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const proc = Deno.spawnChild("curl", { args, stderr: "null" });
+      const status = await proc.status;
       assert(status.success);
-      const stdout = proc.stdout.readable
+      const stdout = proc.stdout
         .pipeThrough(new DecompressionStream("gzip"))
         .pipeThrough(new TextDecoderStream());
       let body = "";
@@ -1847,7 +1848,6 @@ Deno.test({
         body += chunk;
       }
       assertEquals(JSON.parse(body), data);
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
@@ -1892,8 +1892,7 @@ Deno.test({
 
     async function client() {
       const url = `http://${hostname}:${port}/`;
-      const cmd = [
-        "curl",
+      const args = [
         "-i",
         "--request",
         "GET",
@@ -1902,16 +1901,17 @@ Deno.test({
         "--header",
         "Accept-Encoding: gzip, deflate, br",
       ];
-      const proc = Deno.run({ cmd, stdout: "piped", stderr: "null" });
-      const status = await proc.status();
+      const { status, stdout } = await Deno.spawn("curl", {
+        args,
+        stderr: "null",
+      });
       assert(status.success);
-      const output = decoder.decode(await proc.output());
+      const output = decoder.decode(stdout);
       assert(output.includes("vary: Accept-Encoding\r\n"));
       assert(output.includes("content-encoding: gzip\r\n"));
       // Ensure the content-length header is updated.
       assert(!output.includes(`content-length: ${contentLength}\r\n`));
       assert(output.includes("content-length: 72\r\n"));
-      proc.close();
     }
 
     await Promise.all([server(), client()]);
diff --git a/cli/tests/unit/os_test.ts b/cli/tests/unit/os_test.ts
index a469c8c9f..6ed1126f1 100644
--- a/cli/tests/unit/os_test.ts
+++ b/cli/tests/unit/os_test.ts
@@ -74,19 +74,14 @@ Deno.test(
       console.log(
         ${JSON.stringify(Object.keys(expectedEnv))}.map(k => Deno.env.get(k))
       )`;
-      const proc = Deno.run({
-        cmd: [Deno.execPath(), "eval", src],
+      const { status, stdout } = await Deno.spawn(Deno.execPath(), {
+        args: ["eval", src],
         env: { ...inputEnv, NO_COLOR: "1" },
-        stdout: "piped",
       });
-      const status = await proc.status();
       assertEquals(status.success, true);
       const expectedValues = Object.values(expectedEnv);
-      const actualValues = JSON.parse(
-        new TextDecoder().decode(await proc.output()),
-      );
+      const actualValues = JSON.parse(new TextDecoder().decode(stdout));
       assertEquals(actualValues, expectedValues);
-      proc.close();
     };
 
     assertEquals(Deno.env.get("path"), Deno.env.get("PATH"));
@@ -133,16 +128,13 @@ Deno.test(
   { permissions: { run: true, read: true } },
   async function osPpidIsEqualToPidOfParentProcess() {
     const decoder = new TextDecoder();
-    const process = Deno.run({
-      cmd: [Deno.execPath(), "eval", "-p", "--unstable", "Deno.ppid"],
-      stdout: "piped",
+    const { stdout } = await Deno.spawn(Deno.execPath(), {
+      args: ["eval", "-p", "--unstable", "Deno.ppid"],
       env: { NO_COLOR: "true" },
     });
-    const output = await process.output();
-    process.close();
 
     const expected = Deno.pid;
-    const actual = parseInt(decoder.decode(output));
+    const actual = parseInt(decoder.decode(stdout));
     assertEquals(actual, expected);
   },
 );
diff --git a/cli/tests/unit/remove_test.ts b/cli/tests/unit/remove_test.ts
index 04e50f39d..365cc4e45 100644
--- a/cli/tests/unit/remove_test.ts
+++ b/cli/tests/unit/remove_test.ts
@@ -262,13 +262,12 @@ if (Deno.build.os === "windows") {
   Deno.test(
     { permissions: { run: true, write: true, read: true } },
     async function removeFileSymlink() {
-      const symlink = Deno.run({
-        cmd: ["cmd", "/c", "mklink", "file_link", "bar"],
+      const { status } = await Deno.spawn("cmd", {
+        args: ["/c", "mklink", "file_link", "bar"],
         stdout: "null",
       });
 
-      assert(await symlink.status());
-      symlink.close();
+      assert(status.success);
       await Deno.remove("file_link");
       await assertRejects(async () => {
         await Deno.lstat("file_link");
@@ -279,14 +278,12 @@ if (Deno.build.os === "windows") {
   Deno.test(
     { permissions: { run: true, write: true, read: true } },
     async function removeDirSymlink() {
-      const symlink = Deno.run({
-        cmd: ["cmd", "/c", "mklink", "/d", "dir_link", "bar"],
+      const { status } = await Deno.spawn("cmd", {
+        args: ["/c", "mklink", "/d", "dir_link", "bar"],
         stdout: "null",
       });
 
-      assert(await symlink.status());
-      symlink.close();
-
+      assert(status.success);
       await Deno.remove("dir_link");
       await assertRejects(async () => {
         await Deno.lstat("dir_link");
diff --git a/cli/tests/unit/signal_test.ts b/cli/tests/unit/signal_test.ts
index 12c5046a5..4ff4d38e1 100644
--- a/cli/tests/unit/signal_test.ts
+++ b/cli/tests/unit/signal_test.ts
@@ -173,17 +173,14 @@ Deno.test(
     permissions: { run: true, read: true },
   },
   async function canExitWhileListeningToSignal() {
-    const p = Deno.run({
-      cmd: [
-        Deno.execPath(),
+    const { status } = await Deno.spawn(Deno.execPath(), {
+      args: [
         "eval",
         "--unstable",
         "Deno.addSignalListener('SIGIO', () => {})",
       ],
     });
-    const res = await p.status();
-    assertEquals(res.code, 0);
-    p.close();
+    assertEquals(status.code, 0);
   },
 );
 
diff --git a/cli/tests/unit/test_util.ts b/cli/tests/unit/test_util.ts
index 36ef8c0e7..18965fdab 100644
--- a/cli/tests/unit/test_util.ts
+++ b/cli/tests/unit/test_util.ts
@@ -31,17 +31,13 @@ export function pathToAbsoluteFileUrl(path: string): URL {
 const decoder = new TextDecoder();
 
 export async function execCode(code: string): Promise<[number, string]> {
-  const p = Deno.run({
-    cmd: [
-      Deno.execPath(),
+  const { status, stdout } = await Deno.spawn(Deno.execPath(), {
+    args: [
       "eval",
       "--unstable",
       "--no-check",
       code,
     ],
-    stdout: "piped",
   });
-  const [status, output] = await Promise.all([p.status(), p.output()]);
-  p.close();
-  return [status.code, decoder.decode(output)];
+  return [status.code, decoder.decode(stdout)];
 }
diff --git a/cli/tests/unit/tls_test.ts b/cli/tests/unit/tls_test.ts
index 05eced64e..c9f22b75b 100644
--- a/cli/tests/unit/tls_test.ts
+++ b/cli/tests/unit/tls_test.ts
@@ -1019,20 +1019,14 @@ function createHttpsListener(port: number): Deno.Listener {
 }
 
 async function curl(url: string): Promise<string> {
-  const curl = Deno.run({
-    cmd: ["curl", "--insecure", url],
-    stdout: "piped",
+  const { status, stdout } = await Deno.spawn("curl", {
+    args: ["--insecure", url],
   });
 
-  try {
-    const [status, output] = await Promise.all([curl.status(), curl.output()]);
-    if (!status.success) {
-      throw new Error(`curl ${url} failed: ${status.code}`);
-    }
-    return new TextDecoder().decode(output);
-  } finally {
-    curl.close();
+  if (!status.success) {
+    throw new Error(`curl ${url} failed: ${status.code}`);
   }
+  return new TextDecoder().decode(stdout);
 }
 
 Deno.test(
diff --git a/cli/tests/unit/tty_color_test.ts b/cli/tests/unit/tty_color_test.ts
index c10c9ff1e..feb4dd470 100644
--- a/cli/tests/unit/tty_color_test.ts
+++ b/cli/tests/unit/tty_color_test.ts
@@ -6,12 +6,10 @@ import { assertEquals } from "./test_util.ts";
 Deno.test(
   { permissions: { run: true, read: true } },
   async function noColorIfNotTty() {
-    const p = Deno.run({
-      cmd: [Deno.execPath(), "eval", "console.log(1)"],
-      stdout: "piped",
+    const { stdout } = await Deno.spawn(Deno.execPath(), {
+      args: ["eval", "console.log(1)"],
     });
-    const output = new TextDecoder().decode(await p.output());
+    const output = new TextDecoder().decode(stdout);
     assertEquals(output, "1\n");
-    p.close();
   },
 );
diff --git a/runtime/js/40_spawn.js b/runtime/js/40_spawn.js
index 4f680c7e1..77236ee2b 100644
--- a/runtime/js/40_spawn.js
+++ b/runtime/js/40_spawn.js
@@ -141,9 +141,6 @@
     }
 
     async output() {
-      if (this.#rid === null) {
-        throw new TypeError("Child process has already terminated.");
-      }
       if (this.#stdout?.locked) {
         throw new TypeError(
           "Can't collect output because stdout is locked",
diff --git a/tools/flamebench.js b/tools/flamebench.js
index 35f739e1e..5293fa9a1 100755
--- a/tools/flamebench.js
+++ b/tools/flamebench.js
@@ -3,35 +3,34 @@
 import { join, ROOT_PATH as ROOT } from "./util.js";
 
 async function bashOut(subcmd) {
-  const p = Deno.run({
-    cmd: ["bash", "-c", subcmd],
+  const { status, stdout } = await Deno.spawn("bash", {
+    args: ["-c", subcmd],
     stdout: "piped",
     stderr: "null",
   });
 
   // Check for failure
-  const { success } = await p.status();
-  if (!success) {
+  if (!status.success) {
     throw new Error("subcmd failed");
   }
   // Gather output
-  const output = new TextDecoder().decode(await p.output());
-  // Cleanup
-  p.close();
+  const output = new TextDecoder().decode(stdout);
 
   return output.trim();
 }
 
 async function bashThrough(subcmd, opts = {}) {
-  const p = Deno.run({ ...opts, cmd: ["bash", "-c", subcmd] });
+  const { status } = await Deno.spawn("bash", {
+    ...opts,
+    args: ["-c", subcmd],
+    stdout: "inherit",
+    stderr: "inherit",
+  });
 
   // Exit process on failure
-  const { success, code } = await p.status();
-  if (!success) {
-    Deno.exit(code);
+  if (!status.success) {
+    Deno.exit(status.code);
   }
-  // Cleanup
-  p.close();
 }
 
 async function availableBenches() {
diff --git a/tools/format.js b/tools/format.js
index a829c86dd..2cd90f622 100755
--- a/tools/format.js
+++ b/tools/format.js
@@ -5,14 +5,14 @@ import { getPrebuiltToolPath, join, ROOT_PATH } from "./util.js";
 async function dprint() {
   const configFile = join(ROOT_PATH, ".dprint.json");
   const execPath = getPrebuiltToolPath("dprint");
-  const p = Deno.run({
-    cmd: [execPath, "fmt", "--config=" + configFile],
+  const { status } = await Deno.spawn(execPath, {
+    args: ["fmt", "--config=" + configFile],
+    stdout: "inherit",
+    stderr: "inherit",
   });
-  const { success } = await p.status();
-  if (!success) {
+  if (!status.success) {
     throw new Error("dprint failed");
   }
-  p.close();
 }
 
 async function main() {
@@ -20,17 +20,15 @@ async function main() {
   await dprint();
 
   if (Deno.args.includes("--check")) {
-    const git = Deno.run({
-      cmd: ["git", "status", "-uno", "--porcelain", "--ignore-submodules"],
-      stdout: "piped",
+    const { status, stdout } = await Deno.spawn("git", {
+      args: ["status", "-uno", "--porcelain", "--ignore-submodules"],
+      stderr: "inherit",
     });
 
-    const { success } = await git.status();
-    if (!success) {
+    if (!status.success) {
       throw new Error("git status failed");
     }
-    const out = new TextDecoder().decode(await git.output());
-    git.close();
+    const out = new TextDecoder().decode(stdout);
 
     if (out) {
       console.log("run tools/format.js");
diff --git a/tools/lint.js b/tools/lint.js
index a431e05c0..5ecf1c3c4 100755
--- a/tools/lint.js
+++ b/tools/lint.js
@@ -39,14 +39,14 @@ async function dlint() {
 
   const chunks = splitToChunks(sourceFiles, `${execPath} run`.length);
   for (const chunk of chunks) {
-    const p = Deno.run({
-      cmd: [execPath, "run", "--config=" + configFile, ...chunk],
+    const { status } = await Deno.spawn(execPath, {
+      args: ["run", "--config=" + configFile, ...chunk],
+      stdout: "inherit",
+      stderr: "inherit",
     });
-    const { success } = await p.status();
-    if (!success) {
+    if (!status.success) {
       throw new Error("dlint failed");
     }
-    p.close();
   }
 }
 
@@ -70,14 +70,14 @@ async function dlintPreferPrimordials() {
 
   const chunks = splitToChunks(sourceFiles, `${execPath} run`.length);
   for (const chunk of chunks) {
-    const p = Deno.run({
-      cmd: [execPath, "run", "--rule", "prefer-primordials", ...chunk],
+    const { status } = await Deno.spawn(execPath, {
+      args: ["run", "--rule", "prefer-primordials", ...chunk],
+      stdout: "inherit",
+      stderr: "inherit",
     });
-    const { success } = await p.status();
-    if (!success) {
+    if (!status.success) {
       throw new Error("prefer-primordials failed");
     }
-    p.close();
   }
 }
 
@@ -101,14 +101,14 @@ async function clippy() {
   console.log("clippy");
 
   const currentBuildMode = buildMode();
-  const cmd = ["cargo", "clippy", "--all-targets", "--locked"];
+  const cmd = ["clippy", "--all-targets", "--locked"];
 
   if (currentBuildMode != "debug") {
     cmd.push("--release");
   }
 
-  const p = Deno.run({
-    cmd: [
+  const { status } = await Deno.spawn("cargo", {
+    args: [
       ...cmd,
       "--",
       "-D",
@@ -116,12 +116,12 @@ async function clippy() {
       "-D",
       "clippy::await_holding_refcell_ref",
     ],
+    stdout: "inherit",
+    stderr: "inherit",
   });
-  const { success } = await p.status();
-  if (!success) {
+  if (!status.success) {
     throw new Error("clippy failed");
   }
-  p.close();
 }
 
 async function main() {
diff --git a/tools/util.js b/tools/util.js
index fa62097d4..c76456b9a 100644
--- a/tools/util.js
+++ b/tools/util.js
@@ -8,24 +8,21 @@ import {
 } from "../test_util/std/path/mod.ts";
 export { dirname, fromFileUrl, join, resolve, toFileUrl };
 export { existsSync, walk } from "../test_util/std/fs/mod.ts";
-export { readLines } from "../test_util/std/io/mod.ts";
+export { TextLineStream } from "../test_util/std/streams/delimiter.ts";
 export { delay } from "../test_util/std/async/delay.ts";
 
 export const ROOT_PATH = dirname(dirname(fromFileUrl(import.meta.url)));
 
-async function getFilesFromGit(baseDir, cmd) {
-  const p = Deno.run({
-    cmd,
-    stdout: "piped",
+async function getFilesFromGit(baseDir, args) {
+  const { status, stdout } = await Deno.spawn("git", {
+    stderr: "inherit",
+    args,
   });
-  const output = new TextDecoder().decode(await p.output());
-  const { success } = await p.status();
-  if (!success) {
+  const output = new TextDecoder().decode(stdout);
+  if (!status.success) {
     throw new Error("gitLsFiles failed");
   }
 
-  p.close();
-
   const files = output.split("\0").filter((line) => line.length > 0).map(
     (filePath) => {
       return Deno.realPathSync(join(baseDir, filePath));
@@ -38,7 +35,6 @@ async function getFilesFromGit(baseDir, cmd) {
 function gitLsFiles(baseDir, patterns) {
   baseDir = Deno.realPathSync(baseDir);
   const cmd = [
-    "git",
     "-C",
     baseDir,
     "ls-files",
@@ -57,7 +53,6 @@ function gitLsFiles(baseDir, patterns) {
 function gitStaged(baseDir, patterns) {
   baseDir = Deno.realPathSync(baseDir);
   const cmd = [
-    "git",
     "-C",
     baseDir,
     "diff",
diff --git a/tools/wgpu_sync.js b/tools/wgpu_sync.js
index c5b6ffc45..3c6217709 100755
--- a/tools/wgpu_sync.js
+++ b/tools/wgpu_sync.js
@@ -10,15 +10,17 @@ const V_WGPU = "0.12";
 const TARGET_DIR = join(ROOT_PATH, "ext", "webgpu");
 
 async function bash(subcmd, opts = {}) {
-  const p = Deno.run({ ...opts, cmd: ["bash", "-c", subcmd] });
+  const { status } = await Deno.spawn("bash", {
+    ...opts,
+    args: ["-c", subcmd],
+    stdout: "inherit",
+    sdterr: "inherit",
+  });
 
   // Exit process on failure
-  const { success, code } = await p.status();
-  if (!success) {
-    Deno.exit(code);
+  if (!status.success) {
+    Deno.exit(status.code);
   }
-  // Cleanup
-  p.close();
 }
 
 async function clearTargetDir() {
diff --git a/tools/wpt.ts b/tools/wpt.ts
index 52d57ad28..615fbf752 100755
--- a/tools/wpt.ts
+++ b/tools/wpt.ts
@@ -90,10 +90,11 @@ async function setup() {
         `The WPT require certain entries to be present in your ${hostsPath} file. Should these be configured automatically?`,
       );
     if (autoConfigure) {
-      const proc = runPy(["wpt", "make-hosts-file"], { stdout: "piped" });
-      const status = await proc.status();
+      const { status, stdout } = await runPy(["wpt", "make-hosts-file"], {
+        stdout: "piped",
+      }).output();
       assert(status.success, "wpt make-hosts-file should not fail");
-      const entries = new TextDecoder().decode(await proc.output());
+      const entries = new TextDecoder().decode(stdout);
       const file = await Deno.open(hostsPath, { append: true }).catch((err) => {
         if (err instanceof Deno.errors.PermissionDenied) {
           throw new Error(
diff --git a/tools/wpt/runner.ts b/tools/wpt/runner.ts
index 5e0285e77..269e6ffd1 100644
--- a/tools/wpt/runner.ts
+++ b/tools/wpt/runner.ts
@@ -1,5 +1,5 @@
 // Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
-import { delay, join, readLines, ROOT_PATH, toFileUrl } from "../util.js";
+import { delay, join, ROOT_PATH, TextLineStream, toFileUrl } from "../util.js";
 import { assert, denoBinary, ManifestTestOptions, runPy } from "./utils.ts";
 import { DOMParser } from "https://deno.land/x/deno_dom@v0.1.3-alpha2/deno-dom-wasm.ts";
 
@@ -32,8 +32,7 @@ export async function runWithTestUtil<T>(
     const passedTime = performance.now() - start;
     if (passedTime > 15000) {
       proc.kill("SIGINT");
-      await proc.status();
-      proc.close();
+      await proc.status;
       throw new Error("Timed out while trying to start wpt test util.");
     }
   }
@@ -45,8 +44,7 @@ export async function runWithTestUtil<T>(
   } finally {
     if (verbose) console.log("Killing wpt test util.");
     proc.kill("SIGINT");
-    await proc.status();
-    proc.close();
+    await proc.status;
   }
 }
 
@@ -89,21 +87,17 @@ export async function runSingleTest(
 
     const startTime = new Date().getTime();
 
-    const cmd = [
-      denoBinary(),
+    const args = [
       "run",
-    ];
-
-    cmd.push(
       "-A",
       "--unstable",
-    );
+    ];
 
     if (inspectBrk) {
-      cmd.push("--inspect-brk");
+      args.push("--inspect-brk");
     }
 
-    cmd.push(
+    args.push(
       "--enable-testing-features-do-not-use",
       "--location",
       url.toString(),
@@ -113,8 +107,8 @@ export async function runSingleTest(
       "[]",
     );
 
-    const proc = Deno.run({
-      cmd,
+    const proc = Deno.spawnChild(denoBinary(), {
+      args,
       env: {
         NO_COLOR: "1",
       },
@@ -127,7 +121,9 @@ export async function runSingleTest(
 
     let harnessStatus = null;
 
-    const lines = readLines(proc.stderr);
+    const lines = proc.stderr.pipeThrough(new TextDecoderStream()).pipeThrough(
+      new TextLineStream(),
+    );
     for await (const line of lines) {
       if (line.startsWith("{")) {
         const data = JSON.parse(line);
@@ -144,7 +140,7 @@ export async function runSingleTest(
 
     const duration = new Date().getTime() - startTime;
 
-    const { code } = await proc.status();
+    const { code } = await proc.status;
     return {
       status: code,
       harnessStatus,
diff --git a/tools/wpt/utils.ts b/tools/wpt/utils.ts
index f64e20f8f..80580928c 100644
--- a/tools/wpt/utils.ts
+++ b/tools/wpt/utils.ts
@@ -53,7 +53,7 @@ export interface ManifestTestOptions {
 const MANIFEST_PATH = join(ROOT_PATH, "./tools/wpt/manifest.json");
 
 export async function updateManifest() {
-  const proc = runPy(
+  const status = await runPy(
     [
       "wpt",
       "manifest",
@@ -64,8 +64,7 @@ export async function updateManifest() {
       ...(rebuild ? ["--rebuild"] : []),
     ],
     {},
-  );
-  const status = await proc.status();
+  ).status;
   assert(status.success, "updating wpt manifest should succeed");
 }
 
@@ -119,23 +118,26 @@ export function assert(condition: unknown, message: string): asserts condition {
   }
 }
 
-export function runPy(
+export function runPy<T extends Omit<Deno.SpawnOptions, "cwd">>(
   args: string[],
-  options: Omit<Omit<Deno.RunOptions, "cmd">, "cwd">,
-): Deno.Process {
+  options: T,
+): Deno.Child<T> {
   const cmd = Deno.build.os == "windows" ? "python.exe" : "python3";
-  return Deno.run({
-    cmd: [cmd, ...args],
-    cwd: join(ROOT_PATH, "./test_util/wpt/"),
+  return Deno.spawnChild(cmd, {
+    args,
+    stdout: "inherit",
+    stderr: "inherit",
     ...options,
+    cwd: join(ROOT_PATH, "./test_util/wpt/"),
   });
 }
 
 export async function checkPy3Available() {
-  const proc = runPy(["--version"], { stdout: "piped" });
-  const status = await proc.status();
+  const { status, stdout } = await runPy(["--version"], {
+    stdout: "piped",
+  }).output();
   assert(status.success, "failed to run python --version");
-  const output = new TextDecoder().decode(await proc.output());
+  const output = new TextDecoder().decode(stdout);
   assert(
     output.includes("Python 3."),
     `The ${
@@ -146,12 +148,12 @@ export async function checkPy3Available() {
 
 export async function cargoBuild() {
   if (binary) return;
-  const proc = Deno.run({
-    cmd: ["cargo", "build", ...(release ? ["--release"] : [])],
+  const { status } = await Deno.spawn("cargo", {
+    args: ["build", ...(release ? ["--release"] : [])],
     cwd: ROOT_PATH,
+    stdout: "inherit",
+    stderr: "inherit",
   });
-  const status = await proc.status();
-  proc.close();
   assert(status.success, "cargo build failed");
 }
 
@@ -173,22 +175,17 @@ export async function generateRunInfo(): Promise<unknown> {
     "darwin": "mac",
     "linux": "linux",
   };
-  const proc = Deno.run({
-    cmd: ["git", "rev-parse", "HEAD"],
+  const proc = await Deno.spawn("git", {
+    args: ["rev-parse", "HEAD"],
     cwd: join(ROOT_PATH, "test_util", "wpt"),
-    stdout: "piped",
+    stderr: "inherit",
   });
-  await proc.status();
-  const revision = (new TextDecoder().decode(await proc.output())).trim();
-  proc.close();
-  const proc2 = Deno.run({
-    cmd: [denoBinary(), "eval", "console.log(JSON.stringify(Deno.version))"],
+  const revision = (new TextDecoder().decode(proc.stdout)).trim();
+  const proc2 = await Deno.spawn(denoBinary(), {
+    args: ["eval", "console.log(JSON.stringify(Deno.version))"],
     cwd: join(ROOT_PATH, "test_util", "wpt"),
-    stdout: "piped",
   });
-  await proc2.status();
-  const version = JSON.parse(new TextDecoder().decode(await proc2.output()));
-  proc2.close();
+  const version = JSON.parse(new TextDecoder().decode(proc2.stdout));
   const runInfo = {
     "os": oses[Deno.build.os],
     "processor": Deno.build.arch,