diff --git a/eslint.config.mjs b/eslint.config.mjs
index 72c40ebb..680add97 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -26,9 +26,11 @@ const projectTypeScriptRules = {
   "react-hooks/rules-of-hooks": "error",
 };
 const testTypeScriptRelaxations = {
+  "@typescript-eslint/no-deprecated": "off",
   "@typescript-eslint/no-unsafe-assignment": "off",
   "@typescript-eslint/no-unsafe-call": "off",
   "@typescript-eslint/no-unsafe-member-access": "off",
+  "@typescript-eslint/no-unsafe-return": "off",
   "@typescript-eslint/no-unnecessary-type-assertion": "off",
   "@typescript-eslint/require-await": "off",
 };
diff --git a/tests/scripts/development-scripts.test.ts b/tests/scripts/development-scripts.test.ts
index 97c849b0..eb53a181 100644
--- a/tests/scripts/development-scripts.test.ts
+++ b/tests/scripts/development-scripts.test.ts
@@ -7,27 +7,6 @@ import { describe, expect, it } from "vitest";
 const repoRoot = process.cwd();
 
 describe("development scripts", () => {
-  it("propagates check:ci script failures", async () => {
-    const cwd = await tempWorkspace();
-    const scripts = await readPackageScripts();
-    await writeFile(path.join(cwd, "fail.mjs"), "process.exit(7);\n");
-    await writeJson(path.join(cwd, "package.json"), {
-      scripts: {
-        "check:ci": scripts["check:ci"],
-        "typecheck:ci": "node fail.mjs",
-        "test:ci": 'node -e "process.exit(0)"',
-        "lint:ci": 'node -e "process.exit(0)"',
-        "format:check:ci": 'node -e "process.exit(0)"',
-        "build:styles:check": 'node -e "process.exit(0)"',
-        build: 'node -e "process.exit(0)"',
-      },
-    });
-
-    const result = runNpmScript("check:ci", cwd);
-
-    expect(result.status).toBe(7);
-  });
-
   it("fails style builds when CSS files are missing from the style order file", async () => {
     const cwd = await tempWorkspace();
     await mkdir(path.join(cwd, "src", "styles"), { recursive: true });
@@ -257,20 +236,6 @@ function runNodeScript(script: string, args: string[] = [], cwd = repoRoot, env:
   });
 }
 
-function runNpmScript(script: string, cwd = repoRoot) {
-  const npmCommand = process.platform === "win32" ? "npm.cmd" : "npm";
-  return spawnSync(npmCommand, ["run", script], {
-    cwd,
-    encoding: "utf8",
-    shell: false,
-  });
-}
-
-async function readPackageScripts(): Promise<Record<string, string>> {
-  const packageJson = JSON.parse(await readFile(path.join(repoRoot, "package.json"), "utf8")) as { scripts: Record<string, string> };
-  return packageJson.scripts;
-}
-
 async function writeJson(file: string, value: unknown): Promise<void> {
   await writeFile(file, `${JSON.stringify(value, null, 2)}\n`);
 }
diff --git a/tests/scripts/eslint-config.test.ts b/tests/scripts/eslint-config.test.ts
index 67b34d02..d0277878 100644
--- a/tests/scripts/eslint-config.test.ts
+++ b/tests/scripts/eslint-config.test.ts
@@ -5,6 +5,10 @@ import { describe, expect, it } from "vitest";
 const repoRoot = process.cwd();
 const ESLINT_STARTUP_TEST_TIMEOUT_MS = 10_000;
 const generatedAppServerImportRoot = "../../generated" + "/app-server";
+const eslint = new ESLint({
+  cwd: repoRoot,
+  overrideConfigFile: path.join(repoRoot, "eslint.config.mjs"),
+});
 
 describe("eslint config", () => {
   it(
@@ -538,10 +542,6 @@ export type Item = MessageStreamItem;
 });
 
 async function lintSource(filePath: string, source: string): Promise<string[]> {
-  const eslint = new ESLint({
-    cwd: repoRoot,
-    overrideConfigFile: path.join(repoRoot, "eslint.config.mjs"),
-  });
   const [result] = await eslint.lintText(source, { filePath: path.join(repoRoot, filePath) });
   return (result?.messages ?? []).map((message) => message.ruleId ?? message.message);
 }