diff --git a/.github/workflows/ci-preemptive.sh b/.github/workflows/ci-preemptive.sh
index 1a244eaf..88172a60 100644
--- a/.github/workflows/ci-preemptive.sh
+++ b/.github/workflows/ci-preemptive.sh
@@ -17,20 +17,20 @@ export RUST_BACKTRACE=1
 
 # test open-coroutine-core mod
 cd "${PROJECT_DIR}"/core
-"${CARGO}" test --target "${TARGET}" --features preemptive
-"${CARGO}" test --target "${TARGET}" --features preemptive --release
+"${CARGO}" test --target "${TARGET}" --features preemptive,ci
+"${CARGO}" test --target "${TARGET}" --features preemptive,ci --release
 
 # test open-coroutine
 cd "${PROJECT_DIR}"/open-coroutine
-"${CARGO}" test --target "${TARGET}" --features preemptive
-"${CARGO}" test --target "${TARGET}" --features preemptive --release
+"${CARGO}" test --target "${TARGET}" --features preemptive,ci
+"${CARGO}" test --target "${TARGET}" --features preemptive,ci --release
 
 # test io_uring
 if [ "${TARGET}" = "x86_64-unknown-linux-gnu" ]; then
     cd "${PROJECT_DIR}"/core
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive --release
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive,ci
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive,ci --release
     cd "${PROJECT_DIR}"/open-coroutine
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive --release
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive,ci
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,preemptive,ci --release
 fi
diff --git a/.github/workflows/ci.sh b/.github/workflows/ci.sh
index 47b5a23c..5e291dd2 100644
--- a/.github/workflows/ci.sh
+++ b/.github/workflows/ci.sh
@@ -17,20 +17,20 @@ export RUST_BACKTRACE=1
 
 # test open-coroutine-core mod
 cd "${PROJECT_DIR}"/core
-"${CARGO}" test --target "${TARGET}"
-"${CARGO}" test --target "${TARGET}" --release
+"${CARGO}" test --target "${TARGET}" --features ci
+"${CARGO}" test --target "${TARGET}" --features ci --release
 
 # test open-coroutine
 cd "${PROJECT_DIR}"/open-coroutine
-"${CARGO}" test --target "${TARGET}"
-"${CARGO}" test --target "${TARGET}" --release
+"${CARGO}" test --target "${TARGET}" --features ci
+"${CARGO}" test --target "${TARGET}" --features ci --release
 
 # test io_uring
 if [ "${TARGET}" = "x86_64-unknown-linux-gnu" ]; then
     cd "${PROJECT_DIR}"/core
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring --release
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,ci
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,ci --release
     cd "${PROJECT_DIR}"/open-coroutine
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring
-    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring --release
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,ci
+    "${CARGO}" test --target "${TARGET}" --no-default-features --features io_uring,ci --release
 fi
diff --git a/core/Cargo.toml b/core/Cargo.toml
index af54b320..bc058abf 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -35,13 +35,13 @@ crossbeam-utils = { workspace = true, optional = true }
 psm.workspace = true
 
 [target.'cfg(unix)'.dependencies]
-libc.workspace = true
-nix = { workspace = true, features = ["signal"] }
 mio = { workspace = true, features = [
     "net",
     "os-poll",
     "os-ext",
 ], default-features = false, optional = true }
+nix = { workspace = true, features = ["signal"] }
+libc.workspace = true
 
 [target.'cfg(target_os = "linux")'.dependencies]
 io-uring = { workspace = true, optional = true }
@@ -72,10 +72,15 @@ slab.workspace = true
 backtrace.workspace = true
 
 [features]
+default = ["log", "syscall"]
+
 # Print some help log.
 # Enable for default.
 log = ["tracing", "tracing-subscriber", "time"]
 
+# This feature only used in open-coroutine inner, don't use it in your project.
+ci = []
+
 # low-level raw coroutine
 korosensei = ["corosensei", "uuid", "nix/pthread", "educe"]
 
@@ -91,5 +96,3 @@ io_uring = ["net", "io-uring"]
 
 # Provide syscall implementation.
 syscall = ["net"]
-
-default = ["log", "syscall"]
\ No newline at end of file
diff --git a/core/src/common/ci.rs b/core/src/common/ci.rs
new file mode 100644
index 00000000..28d02550
--- /dev/null
+++ b/core/src/common/ci.rs
@@ -0,0 +1,8 @@
+/// just for CI
+pub fn init() {
+    let _ = std::thread::spawn(|| {
+        // exit after 600 seconds, just for CI
+        std::thread::sleep(std::time::Duration::from_secs(600));
+        std::process::exit(-1);
+    });
+}
diff --git a/core/src/common/mod.rs b/core/src/common/mod.rs
index 0e7aff9d..44150798 100644
--- a/core/src/common/mod.rs
+++ b/core/src/common/mod.rs
@@ -3,6 +3,10 @@ use std::ffi::c_int;
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::time::{Duration, SystemTime, UNIX_EPOCH};
 
+/// CI tools.
+#[cfg(feature = "ci")]
+pub mod ci;
+
 /// Constants.
 pub mod constants;
 
diff --git a/core/src/net/mod.rs b/core/src/net/mod.rs
index b512a39a..5b811d8a 100644
--- a/core/src/net/mod.rs
+++ b/core/src/net/mod.rs
@@ -60,6 +60,8 @@ impl EventLoops {
     /// Init the `EventLoops`.
     pub fn init(config: &Config) {
         _ = INSTANCE.get_or_init(|| {
+            #[cfg(feature = "ci")]
+            crate::common::ci::init();
             let loops = Self::new(
                 config.event_loop_size(),
                 config.stack_size(),
diff --git a/hook/Cargo.toml b/hook/Cargo.toml
index 47c4f4a5..e1c324cc 100644
--- a/hook/Cargo.toml
+++ b/hook/Cargo.toml
@@ -30,10 +30,15 @@ windows-sys = { workspace = true, features = [
 minhook.workspace = true
 
 [features]
+default = ["open-coroutine-core/default"]
+
 # Print some help log.
 # Enable for default.
 log = ["open-coroutine-core/log"]
 
+# This feature only used in open-coroutine inner, don't use it in your project.
+ci = ["open-coroutine-core/ci"]
+
 # Provide preemptive scheduling implementation.
 # Enable for default.
 preemptive = ["open-coroutine-core/preemptive"]
@@ -47,7 +52,5 @@ io_uring = ["open-coroutine-core/io_uring"]
 # Provide syscall implementation.
 syscall = ["open-coroutine-core/syscall"]
 
-default = ["open-coroutine-core/default"]
-
 [lib]
 crate-type = ["cdylib"]
diff --git a/open-coroutine/Cargo.toml b/open-coroutine/Cargo.toml
index 8dacd906..5f63daaa 100644
--- a/open-coroutine/Cargo.toml
+++ b/open-coroutine/Cargo.toml
@@ -45,6 +45,9 @@ default = ["open-coroutine-hook/default", "open-coroutine-core/default"]
 # Enable for default.
 log = ["open-coroutine-hook/log", "open-coroutine-core/log"]
 
+# This feature only used in open-coroutine inner, don't use it in your project.
+ci = ["open-coroutine-hook/ci", "open-coroutine-core/ci"]
+
 # Provide preemptive scheduling implementation.
 # Enable for default.
 preemptive = ["open-coroutine-hook/preemptive", "open-coroutine-core/preemptive"]
diff --git a/open-coroutine/src/lib.rs b/open-coroutine/src/lib.rs
index 0fbb9151..7aca001e 100644
--- a/open-coroutine/src/lib.rs
+++ b/open-coroutine/src/lib.rs
@@ -92,6 +92,8 @@ pub fn init(config: Config) {
         unsafe { open_coroutine_init(config) },
         "open-coroutine init failed !"
     );
+    #[cfg(feature = "ci")]
+    open_coroutine_core::common::ci::init();
 }
 
 /// Shutdown the open-coroutine.