diff --git a/package.json b/package.json
index 54f7700934..531f9f75d9 100644
--- a/package.json
+++ b/package.json
@@ -43,6 +43,7 @@
     "test:ci": "npm run test:ci --workspaces --if-present && npm run test:scripts && npm run test:sea-launch",
     "test:scripts": "vitest run --config ./scripts/tests/vitest.config.ts",
     "test:sea-launch": "vitest run sea/sea-launch.test.js",
+    "posttest": "npm run build",
     "test:always_passing_evals": "vitest run --config evals/vitest.config.ts",
     "test:all_evals": "cross-env RUN_EVALS=1 vitest run --config evals/vitest.config.ts",
     "test:e2e": "cross-env VERBOSE=true KEEP_OUTPUT=true npm run test:integration:sandbox:none",
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 95de41454d..79cb21307a 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -20,6 +20,7 @@
     "format": "prettier --write .",
     "test": "vitest run",
     "test:ci": "vitest run",
+    "posttest": "npm run build",
     "typecheck": "tsc --noEmit"
   },
   "files": [
diff --git a/packages/core/package.json b/packages/core/package.json
index 98b1be736b..de105d4389 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -16,6 +16,7 @@
     "format": "prettier --write .",
     "test": "vitest run",
     "test:ci": "vitest run",
+    "posttest": "npm run build",
     "typecheck": "tsc --noEmit"
   },
   "files": [