diff --git a/package.json b/package.json
index c610aa33..4b5e27e2 100644
--- a/package.json
+++ b/package.json
@@ -119,9 +119,7 @@
     "prettier": "prettier --check .",
     "schemas:check": "./bin/json-schema-store.js",
     "schemas:write": "./bin/json-schema-store.js --update",
-    "test": "npm run test:multi && npm run test:single",
-    "test:multi": "vitest run --coverage",
-    "test:single": "vitest run --coverage --config vitest.single-threaded.config.ts"
+    "test": "vitest run --coverage"
   },
   "commitlint": {
     "extends": [
diff --git a/vitest.config.ts b/vitest.config.ts
deleted file mode 100644
index 10d82e5f..00000000
--- a/vitest.config.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-// eslint-disable-next-line import/no-extraneous-dependencies
-import { defineConfig } from 'vitest/config';
-
-export default defineConfig({
-  test: {
-    coverage: {
-      reporter: 'text',
-      thresholds: {
-        branches: 80,
-        functions: 80,
-        lines: 90,
-        statements: 90,
-      },
-    },
-    exclude: ['**/dist/**', '**/node_modules/**', '**/__fixtures__/**', '**/helpers/**', '**/single-threaded/**'],
-    globalSetup: ['./__tests__/setup.js'],
-    setupFiles: ['./__tests__/helpers/vitest.matchers.ts'],
-  },
-});
diff --git a/vitest.single-threaded.config.ts b/vitest.single-threaded.config.ts
deleted file mode 100644
index c0a07923..00000000
--- a/vitest.single-threaded.config.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-// eslint-disable-next-line import/no-extraneous-dependencies
-import { defineConfig } from 'vitest/config';
-
-export default defineConfig({
-  test: {
-    coverage: {
-      reporter: 'text',
-    },
-    exclude: ['**/dist/**', '**/node_modules/**', '**/__fixtures__/**', '**/helpers/**', '**/__snapshots__/**'],
-    globalSetup: ['./__tests__/setup.js'],
-    include: ['**/single-threaded/**'],
-    setupFiles: ['./__tests__/helpers/vitest.matchers.ts'],
-
-    /**
-     * We can't run tests with `threads` on because we use `process.chdir()` in some tests and
-     * that isn't available in worker threads, and it's way too much work to mock out an entire
-     * filesystem and `fs` calls for the tests that use it.
-     *
-     * @see {@link https://github.com/vitest-dev/vitest/issues/566}
-     */
-    pool: 'forks',
-  },
-});
diff --git a/vitest.workspace.ts b/vitest.workspace.ts
new file mode 100644
index 00000000..81c06c7c
--- /dev/null
+++ b/vitest.workspace.ts
@@ -0,0 +1,48 @@
+// eslint-disable-next-line import/no-extraneous-dependencies
+import { defineWorkspace } from 'vitest/config';
+
+const sharedExclude = [
+  '**/dist/**',
+  '**/node_modules/**',
+  '**/__fixtures__/**',
+  '**/helpers/**',
+  '**/__snapshots__/**',
+];
+
+const sharedOpts = {
+  globalSetup: ['./__tests__/setup.js'],
+  setupFiles: ['./__tests__/helpers/vitest.matchers.ts'],
+};
+
+export default defineWorkspace([
+  {
+    /**
+     * Our default test suite
+     */
+    test: {
+      exclude: [...sharedExclude, '**/single-threaded/**'],
+      name: 'default',
+      ...sharedOpts,
+    },
+  },
+  {
+    /**
+     * Our single-threaded test suite.
+     * Only tests that use `process.chdir()` should be run using this config.
+     */
+    test: {
+      exclude: sharedExclude,
+      include: ['**/single-threaded/**'],
+      name: 'single-threaded',
+      /**
+       * We can't run tests with `threads` on because we use `process.chdir()` in some tests and
+       * that isn't available in worker threads, and it's way too much work to mock out an entire
+       * filesystem and `fs` calls for the tests that use it.
+       *
+       * @see {@link https://github.com/vitest-dev/vitest/issues/566}
+       */
+      pool: 'forks',
+      ...sharedOpts,
+    },
+  },
+]);