diff --git a/package.json b/package.json
index 9c6b2bfd..87f9bf77 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "api:baseline": "node scripts/api-baseline.mjs",
     "build": "node esbuild.config.mjs",
     "build:styles": "node scripts/build-styles.mjs",
-    "check": "concurrently --group --pad-prefix 'node:check:*' && node --run build",
+    "check": "node --run build && concurrently --group --pad-prefix 'node:check:*'",
     "check:biome": "biome check --diagnostic-level=warn --error-on-warnings",
     "check:css-usage": "node scripts/check-css-usage.mjs",
     "check:eslint": "eslint src manifest.json LICENSE --max-warnings=0",
diff --git a/tests/scripts/development-scripts.test.ts b/tests/scripts/development-scripts.test.ts
index 2cf10cd4..dc3e4e60 100644
--- a/tests/scripts/development-scripts.test.ts
+++ b/tests/scripts/development-scripts.test.ts
@@ -1,11 +1,17 @@
 import { spawnSync } from "node:child_process";
-import { mkdir, mkdtemp, readdir, readFile, writeFile } from "node:fs/promises";
+import { mkdir, mkdtemp, readdir, readFile, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import path from "node:path";
 import { pathToFileURL } from "node:url";
-import { describe, expect, it } from "vitest";
+import { afterEach, describe, expect, it } from "vitest";
 
 const repoRoot = process.cwd();
+const tempWorkspaces = new Set<string>();
+
+afterEach(async () => {
+  await Promise.all([...tempWorkspaces].map((workspace) => rm(workspace, { recursive: true, force: true })));
+  tempWorkspaces.clear();
+});
 
 describe("development scripts", () => {
   it("fails style builds when CSS files are missing from the style order file", async () => {
@@ -193,7 +199,9 @@ describe("development scripts", () => {
 });
 
 async function tempWorkspace(): Promise<string> {
-  return mkdtemp(path.join(tmpdir(), "codex-panel-scripts-"));
+  const workspace = await mkdtemp(path.join(tmpdir(), "codex-panel-scripts-"));
+  tempWorkspaces.add(workspace);
+  return workspace;
 }
 
 async function styleOrderFixture(): Promise<string> {
diff --git a/tests/scripts/grit-policy.test.mjs b/tests/scripts/grit-policy.test.mjs
index b305cea1..9121caf4 100644
--- a/tests/scripts/grit-policy.test.mjs
+++ b/tests/scripts/grit-policy.test.mjs
@@ -1,11 +1,17 @@
 import { spawnSync } from "node:child_process";
 import { readFileSync } from "node:fs";
-import { mkdir, mkdtemp, readdir, writeFile } from "node:fs/promises";
+import { mkdir, mkdtemp, readdir, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import path from "node:path";
-import { describe, expect, it } from "vitest";
+import { afterEach, describe, expect, it } from "vitest";
 
 const repoRoot = process.cwd();
+const tempWorkspaces = new Set();
+
+afterEach(async () => {
+  await Promise.all([...tempWorkspaces].map((workspace) => rm(workspace, { recursive: true, force: true })));
+  tempWorkspaces.clear();
+});
 const biomeBin = path.join(repoRoot, "node_modules", ".bin", "biome");
 const projectBiomeConfig = parseJsonc(readFileSync(path.join(repoRoot, "biome.jsonc"), "utf8"));
 const projectPluginEntries = projectBiomeConfig.plugins;
@@ -1486,6 +1492,7 @@ export async function read(client: AppServerClient): Promise<void> {
 
 async function tempBiomeWorkspace(plugins) {
   const cwd = await mkdtemp(path.join(tmpdir(), "codex-panel-grit-policy-"));
+  tempWorkspaces.add(cwd);
   await mkdir(cwd, { recursive: true });
   await mkdir(path.join(cwd, "src/features/chat/domain/thread-stream"), { recursive: true });
   await mkdir(path.join(cwd, "src/features/chat/application/state"), { recursive: true });