diff --git a/test/scripts/kitchen-sink-plugin-assertions.test.ts b/test/scripts/kitchen-sink-plugin-assertions.test.ts
index ec79b91cb740..567e79f3c97c 100644
--- a/test/scripts/kitchen-sink-plugin-assertions.test.ts
+++ b/test/scripts/kitchen-sink-plugin-assertions.test.ts
@@ -14,6 +14,7 @@ import path from "node:path";
 import { describe, expect, it } from "vitest";
 
 const ASSERTIONS_SCRIPT = "scripts/e2e/lib/kitchen-sink-plugin/assertions.mjs";
+const BASH_BIN = process.platform === "win32" ? "bash" : "/bin/bash";
 const SWEEP_SCRIPT = "scripts/e2e/lib/kitchen-sink-plugin/sweep.sh";
 const REQUIRED_FULL_DIAGNOSTIC_CANARIES = [
   "agent tool result middleware must be a function",
@@ -225,13 +226,42 @@ function runScanLogs({
 }
 
 function runSweepShell(script: string, env: NodeJS.ProcessEnv = {}) {
-  return spawnSync("/bin/bash", ["-c", script], {
+  return spawnSync(BASH_BIN, ["-c", toBashScript(script)], {
     cwd: process.cwd(),
     encoding: "utf8",
-    env: { ...process.env, ...env },
+    env: { ...process.env, ...toBashEnv(env) },
   });
 }
 
+function toBashScript(script: string) {
+  if (process.platform === "win32") {
+    return `export PATH="/usr/bin:/bin:$PATH"\n${script}`;
+  }
+  return script;
+}
+
+function toBashEnv(env: NodeJS.ProcessEnv) {
+  if (process.platform !== "win32") {
+    return env;
+  }
+
+  return Object.fromEntries(
+    Object.entries(env).map(([key, value]) => [
+      key,
+      typeof value === "string" ? toGitBashPath(value) : value,
+    ]),
+  );
+}
+
+function toGitBashPath(value: string) {
+  const match = /^([A-Za-z]):[\\/](.*)$/u.exec(value);
+  if (!match) {
+    return value;
+  }
+
+  return `/${match[1].toLowerCase()}/${match[2].replaceAll("\\", "/")}`;
+}
+
 describe("kitchen-sink plugin assertions", () => {
   it("bounds expected-failure output before matching failure diagnostics", () => {
     const scratchRoot = mkdtempSync(path.join(tmpdir(), "openclaw-kitchen-sink-failure-cap-"));