diff --git a/tools/wpt.ts b/tools/wpt.ts
index d56ff34d66..b582219fac 100755
--- a/tools/wpt.ts
+++ b/tools/wpt.ts
@@ -20,6 +20,7 @@ import {
   getExpectation,
   getExpectFailForCase,
   getManifest,
+  inspectBrk,
   json,
   ManifestFolder,
   ManifestTestOptions,
@@ -161,6 +162,7 @@ async function run() {
         test.url,
         test.options,
         createReportTestCase(test.expectation),
+        inspectBrk,
       );
       results.push({ test, result });
       reportVariation(result, test.expectation);
@@ -312,6 +314,7 @@ async function update() {
         test.url,
         test.options,
         json ? () => {} : createReportTestCase(test.expectation),
+        inspectBrk,
       );
       results.push({ test, result });
       reportVariation(result, test.expectation);
diff --git a/tools/wpt/runner.ts b/tools/wpt/runner.ts
index 4f4389fd3d..b7a51af9dd 100644
--- a/tools/wpt/runner.ts
+++ b/tools/wpt/runner.ts
@@ -76,6 +76,7 @@ export async function runSingleTest(
   url: URL,
   _options: ManifestTestOptions,
   reporter: (result: TestCaseResult) => void,
+  inspectBrk: boolean,
 ): Promise<TestResult> {
   const bundle = await generateBundle(url);
   const tempFile = await Deno.makeTempFile({
@@ -88,20 +89,32 @@ export async function runSingleTest(
 
     const startTime = new Date().getTime();
 
+    const cmd = [
+      denoBinary(),
+      "run",
+    ];
+
+    cmd.push(
+      "-A",
+      "--unstable",
+    );
+
+    if (inspectBrk) {
+      cmd.push("--inspect-brk");
+    }
+
+    cmd.push(
+      "--enable-testing-features-do-not-use",
+      "--location",
+      url.toString(),
+      "--cert",
+      join(ROOT_PATH, `./tools/wpt/certs/cacert.pem`),
+      tempFile,
+      "[]",
+    );
+
     const proc = Deno.run({
-      cmd: [
-        denoBinary(),
-        "run",
-        "-A",
-        "--unstable",
-        "--enable-testing-features-do-not-use",
-        "--location",
-        url.toString(),
-        "--cert",
-        join(ROOT_PATH, `./tools/wpt/certs/cacert.pem`),
-        tempFile,
-        "[]",
-      ],
+      cmd,
       env: {
         NO_COLOR: "1",
       },
diff --git a/tools/wpt/utils.ts b/tools/wpt/utils.ts
index 1a7a682be6..a5e7625271 100644
--- a/tools/wpt/utils.ts
+++ b/tools/wpt/utils.ts
@@ -12,10 +12,11 @@ export const {
   rebuild,
   ["--"]: rest,
   ["auto-config"]: autoConfig,
+  ["inspect-brk"]: inspectBrk,
   binary,
 } = parse(Deno.args, {
   "--": true,
-  boolean: ["quiet", "release", "no-interactive"],
+  boolean: ["quiet", "release", "no-interactive", "inspect-brk"],
   string: ["json", "wptreport", "binary"],
 });