diff --git a/Cargo.lock b/Cargo.lock
index d2983c0..5a7460a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -96,6 +96,7 @@ dependencies = [
  "assert_cmd",
  "clap",
  "clap_complete",
+ "escargot",
  "pretty_assertions",
  "thiserror",
  "tracing",
@@ -105,9 +106,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.3"
+version = "4.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "949626d00e063efc93b6dca932419ceb5432f99769911c0b995f7e884c778813"
+checksum = "90bc066a67923782aa8515dbaea16946c5bcc5addbd668bb80af688e53e548a0"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -136,9 +137,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.5.3"
+version = "4.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90239a040c80f5e14809ca132ddc4176ab33d5e17e49691793296e3fcb34d72f"
+checksum = "528131438037fd55894f62d6e9f068b8f45ac57ffa77517819645d10aed04f64"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -176,12 +177,30 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
 
+[[package]]
+name = "escargot"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f474c6844cbd04e783d0f25757583db4f491770ca618bedf2fb01815fc79939"
+dependencies = [
+ "log",
+ "once_cell",
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "heck"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "itoa"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -202,9 +221,9 @@ checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
 name = "memchr"
-version = "2.7.1"
+version = "2.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
+checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
 
 [[package]]
 name = "nu-ansi-term"
@@ -230,9 +249,9 @@ checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
 
 [[package]]
 name = "pin-project-lite"
-version = "0.2.13"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8afb450f006bf6385ca15ef45d71d2288452bc3683ce2e2cacc0d18e4be60b58"
+checksum = "bda66fc9667c18cb2758a2ac84d1167245054bcf85d5d1aaa6923f45801bdd02"
 
 [[package]]
 name = "predicates"
@@ -295,6 +314,12 @@ version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "86b83b8b9847f9bf95ef68afb0b8e6cdb80f498442f5179a29fad448fcc1eaea"
 
+[[package]]
+name = "ryu"
+version = "1.0.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
+
 [[package]]
 name = "serde"
 version = "1.0.197"
@@ -315,6 +340,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
+version = "1.0.115"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12dc5c46daa8e9fdf4f5e71b6cf9a53f2487da0e86e55808e2d35539666497dd"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -338,9 +374,9 @@ checksum = "5ee073c9e4cd00e28217186dbe12796d692868f432bf2e97ee73bed0c56dfa01"
 
 [[package]]
 name = "syn"
-version = "2.0.55"
+version = "2.0.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "002a1b3dbf967edfafc32655d0f377ab0bb7b994aa1d32c8cc7e9b8bf3ebb8f0"
+checksum = "11a6ae1e52eb25aab8f3fb9fca13be982a373b8f1157ca14b897a825ba4a2d35"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 77a5c72..edfa37d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,13 +15,11 @@ tracing-subscriber = { version = "0.3", optional = true }
 clap = { version = "4", optional = true, features = ["derive"] }
 clap_complete = { version = "4", optional = true }
 
-
-
-
 [build-dependencies]
 
 [dev-dependencies]
 assert_cmd = "2"
+escargot = "0.5"
 pretty_assertions = { version = "1", features = ["unstable"] }
 
 [[bin]]
diff --git a/src/bin/chen_lang.rs b/src/bin/chen_lang.rs
index fb3af8a..75d6991 100644
--- a/src/bin/chen_lang.rs
+++ b/src/bin/chen_lang.rs
@@ -74,11 +74,10 @@ fn run_file(code_file: String) -> Result<()> {
     debug!(?s);
     let mut f = OpenOptions::new().read(true).open(s)?;
 
-    let mut v = vec![];
-    f.read_to_end(&mut v)?;
-    let code = String::from_utf8(v)?;
-
+    let mut code = String::new();
+    f.read_to_string(&mut code)?;
     debug!(?code);
+
     chen_lang::run(code)?;
     Ok(())
 }
@@ -86,20 +85,3 @@ fn run_file(code_file: String) -> Result<()> {
 fn print_completions<G: Generator>(gen: G, cmd: &mut Command) {
     generate(gen, cmd, cmd.get_name().to_string(), &mut io::stdout());
 }
-
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn _test() {
-        assert_cmd::Command::new("cargo").arg("build").ok().unwrap();
-    }
-
-    #[test]
-    fn cmd_test() {
-        assert_cmd::Command::cargo_bin(env!("CARGO_PKG_NAME"))
-            .unwrap()
-            .args(["-h"])
-            .ok()
-            .unwrap();
-    }
-}
diff --git a/src/tests/cli_test.rs b/src/tests/cli_test.rs
new file mode 100644
index 0000000..d48f6e7
--- /dev/null
+++ b/src/tests/cli_test.rs
@@ -0,0 +1,17 @@
+use std::process::Command;
+
+use assert_cmd::{cargo::CargoError, prelude::*};
+
+fn command() -> Command {
+    let runner = escargot::CargoBuild::new()
+        .current_target()
+        .run()
+        .map_err(CargoError::with_cause)
+        .unwrap();
+    runner.command()
+}
+
+#[test]
+fn cmd_test() {
+    command().args(["-h"]).ok().unwrap();
+}
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index 69e88e8..a328191 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -1,7 +1,7 @@
+mod cli_test;
 mod expression_test;
 mod parse_test;
 mod token_test;
-
 #[cfg(test)]
 mod tests_1 {
     use pretty_assertions::assert_eq;
diff --git a/src/tests/token_test.rs b/src/tests/token_test.rs
index 7585b35..3a3de33 100644
--- a/src/tests/token_test.rs
+++ b/src/tests/token_test.rs
@@ -1,15 +1,13 @@
-#![rustfmt::skip]
-
 use pretty_assertions::assert_eq;
 
-use crate::Keyword::DEF;
-use crate::Operator::{NotEquals, Or, Subtract};
 use crate::token;
 use crate::token::Keyword::{ELSE, FOR, IF, LET};
-use crate::token::Operator::{ADD, Assign, Equals, LT, Mod};
+use crate::token::Operator::{Assign, Equals, Mod, ADD, LT};
 use crate::token::Token::{
     Identifier, Int, Keyword, LBig, LParen, NewLine, Operator, RBig, RParen, String,
 };
+use crate::Keyword::DEF;
+use crate::Operator::{NotEquals, Or, Subtract};
 
 #[test]
 fn test_parse_keyword() {
@@ -42,7 +40,7 @@ for i<100{
 }
 "#
     .to_string();
-
+    #[rustfmt::skip]
     assert_eq!(
         token::tokenlizer(code).unwrap(),
         vec![
@@ -90,6 +88,7 @@ println(sum)
 "#
     .to_string();
 
+    #[rustfmt::skip]
     assert_eq!(
         token::tokenlizer(code).unwrap(),
         vec![