diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9ccf6249..46ef22134 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,6 +36,10 @@ jobs:
       - name: Run microbench
         run: |
           make microbench
+      - name: Run test262
+        run: |
+          make test2-bootstrap
+          make test2
 
   linux-lto:
     name: Linux LTO
@@ -138,6 +142,10 @@ jobs:
       - name: Run built-in tests
         run: |
           make test
+      - name: Run test262
+        run: |
+          make test2-bootstrap
+          make test2
 
   macos-asan:
     runs-on: macos-latest
@@ -172,7 +180,12 @@ jobs:
       - name: Build + test
         uses: vmactions/freebsd-vm@v1
         with:
+          # This VM has a tendency to get stuck in the "VM is booting" cycle
+          # for quite a while, so set a shorter timeout
+          timeout-minutes: 15
           usesh: true
+          copyback: false
+          mem: 16384
           prepare: |
             pkg install -y gmake
           run: |
@@ -202,6 +215,10 @@ jobs:
       - name: Run built-in tests
         run: |
           make CONFIG_COSMO=y test
+      - name: Run test262
+        run: |
+          make test2-bootstrap
+          make CONFIG_COSMO=y test2
 
   mingw-windows:
     name: MinGW Windows target
diff --git a/Makefile b/Makefile
index 3b1c74594..d56e56408 100644
--- a/Makefile
+++ b/Makefile
@@ -54,6 +54,10 @@ PREFIX?=/usr/local
 # use UB sanitizer
 #CONFIG_UBSAN=y
 
+# TEST262 bootstrap config: commit id and shallow "since" parameter
+TEST262_COMMIT?=a073f479f80b336256b7fc4e04700c827293e2fe
+TEST262_SINCE?=2025-06-09
+
 OBJDIR=.obj
 
 ifdef CONFIG_ASAN
@@ -464,6 +468,15 @@ stats: qjs$(EXE)
 microbench: qjs$(EXE)
 	$(WINE) ./qjs$(EXE) --std tests/microbench.js
 
+ifeq ($(wildcard test262/features.txt),)
+test2-bootstrap:
+	git clone --single-branch --shallow-since=$(TEST262_SINCE) https://github.com/tc39/test262.git
+	(cd test262 && git checkout -q $(TEST262_COMMIT) && patch -p1 < ../tests/test262.patch && cd ..)
+else
+test2-bootstrap:
+	(cd test262 && git fetch && git reset --hard $(TEST262_COMMIT) && patch -p1 < ../tests/test262.patch && cd ..)
+endif
+
 ifeq ($(wildcard test262o/tests.txt),)
 test2o test2o-update:
 	@echo test262o tests not installed
diff --git a/tests/test262.patch b/tests/test262.patch
index 6956d15b1..e488df829 100644
--- a/tests/test262.patch
+++ b/tests/test262.patch
@@ -14,9 +14,9 @@ index 9828b15..4a5919d 100644
 +//  small: 200,
 +//  long: 1000,
 +//  huge: 10000,
-+  yield: 20,
-+  small: 20,
-+  long: 100,
++  yield: 40,
++  small: 40,
++  long: 200,
 +  huge: 1000,
  };