diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 53959d5e7..179fe876b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,9 +37,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      # Pin to 1.3.10: bun 1.3.11 breaks spyOn on ESM barrel re-exports,
+      # causing 7 createBuiltinAgents tests to fail in batch execution.
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          bun-version: "1.3.10"
 
       - name: Install dependencies
         run: bun install
@@ -47,7 +49,7 @@ jobs:
           BUN_INSTALL_ALLOW_SCRIPTS: "@ast-grep/napi"
 
       - name: Run tests
-        run: bun run test:ci
+        run: bun test
 
   typecheck:
     runs-on: ubuntu-latest
@@ -56,7 +58,7 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          bun-version: "1.3.10"
 
       - name: Install dependencies
         run: bun install
@@ -81,7 +83,7 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          bun-version: "1.3.10"
 
       - name: Install dependencies
         run: bun install
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 37b3a7a3b..29fc46b16 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -38,7 +38,7 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          bun-version: "1.3.10"
 
       - name: Install dependencies
         run: bun install
@@ -46,7 +46,7 @@ jobs:
           BUN_INSTALL_ALLOW_SCRIPTS: "@ast-grep/napi"
 
       - name: Run tests
-        run: bun run test:ci
+        run: bun test
 
   typecheck:
     runs-on: ubuntu-latest
@@ -55,7 +55,7 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          bun-version: "1.3.10"
 
       - name: Install dependencies
         run: bun install
@@ -81,7 +81,7 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: latest
+          bun-version: "1.3.10"
 
       - uses: actions/setup-node@v4
         with:
diff --git a/package.json b/package.json
index 692ec4c00..d88d831eb 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
     "postinstall": "node postinstall.mjs",
     "prepublishOnly": "bun run clean && bun run build",
     "test:model-capabilities": "bun test src/shared/model-capability-aliases.test.ts src/shared/model-capability-guardrails.test.ts src/shared/model-capabilities.test.ts src/cli/doctor/checks/model-resolution.test.ts --bail",
-    "test:ci": "bun run script/run-ci-tests.ts",
     "typecheck": "tsc --noEmit",
     "test": "bun test"
   },