diff --git a/Makefile b/Makefile
index 44a788d..53ac6d6 100644
--- a/Makefile
+++ b/Makefile
@@ -32,7 +32,7 @@ re:
 tests:
 	$(MAKE) all
 	mkdir -p log
-	python3 test/test.py build/$(NAME)
+	python3 test/test.py build/$(NAME) 1
 
 .PHONY: all clean fclean re tests
 -include $(DEP)
diff --git a/test/execution.py b/test/execution.py
index f1278f7..4c9a133 100644
--- a/test/execution.py
+++ b/test/execution.py
@@ -4,11 +4,12 @@ import os
 import signal
 
 import thread_manager
+from print import print_test
 
 def _cmp_header(expected: str, value: str):
     pass
 
-def _test(title: str, excutable: str, args: str, exit_code: int, delay: float, log_path: str) -> None:
+def _test(valgrind: bool, title: str, excutable: str, args: str, exit_code: int, delay: float, log_path: str) -> None:
     log_path = f"{log_path}/{title}"
     if not os.path.exists(log_path):
         os.makedirs(log_path)
@@ -24,11 +25,23 @@ def _test(title: str, excutable: str, args: str, exit_code: int, delay: float, l
     your_file.close()
     normal_file.close()
 
-def test_excution(excutable: str, tests_category: dict[str, list[dict[str, str]]], log_path: str):
+    if valgrind == False:
+        return
+
+    f = open(f"{log_path}/valgrind.log", "w")
+    p = subprocess.Popen(f"valgrind --leak-check=full --show-leak-kinds=all --errors-for-leak-kinds=all --error-exitcode=79 {excutable} {args}".split(" "), stdout=f, stderr=f)
+    time.sleep(1)
+    p.send_signal(signal.SIGINT)
+    value = p.wait()
+    f.close()
+    print_test(exit_code, value, f"{title}_VALGRIND", args)
+
+def test_excution(valgrind: bool, excutable: str, tests_category: dict[str, list[dict[str, str]]], log_path: str):
     for category_name, tests in tests_category.items():
         print(category_name)
         for test in tests:
-            _test(test["title"], excutable, test['args'], test.get("exit", 0), test.get("delay", 1), f"{log_path}/{category_name}")
-            thread_manager.add_to_queu(_test, (test["title"], excutable, test['args'], test.get("exit", 0), test.get("delay", 1), f"{log_path}/{category_name}"))
+            #thread_manager.add_to_queu(
+            _test(valgrind, test["title"], excutable, test['args'], test.get("exit", 0), test.get("delay", 1), f"{log_path}/{category_name}")
+            #)
         thread_manager.wait_pool()
         print("\n" * 1)
\ No newline at end of file
diff --git a/test/parsing.py b/test/parsing.py
index bea3567..4a88490 100644
--- a/test/parsing.py
+++ b/test/parsing.py
@@ -6,7 +6,7 @@ import time
 import thread_manager
 from print import print_test
 
-def _test(title: str, excutable: str, args: str, exit_code: int, log_path: str) -> None:
+def _test(valgrind: bool, title: str, excutable: str, args: str, exit_code: int, log_path: str) -> None:
     if not os.path.exists(log_path):
         os.makedirs(log_path)
     f = open(f"{log_path}/{title}.log", "w")
@@ -17,10 +17,21 @@ def _test(title: str, excutable: str, args: str, exit_code: int, log_path: str)
     f.close()
     print_test(exit_code, value, title, args)
 
-def test_parsing(excutable: str, tests_category: dict[str, list[dict[str, str]]], log_path: str):
+    if valgrind == False:
+        return
+
+    f = open(f"{log_path}/{title}_valgrind.log", "w")
+    p = subprocess.Popen(f"valgrind --leak-check=full --show-leak-kinds=all --errors-for-leak-kinds=all --error-exitcode=79 {excutable} {args}".split(" "), stdout=f, stderr=f)
+    time.sleep(1)
+    p.send_signal(signal.SIGINT)
+    value = p.wait()
+    f.close()
+    print_test(exit_code, value, f"{title}_VALGRIND", args)
+
+def test_parsing(valgrind: bool, excutable: str, tests_category: dict[str, list[dict[str, str]]], log_path: str):
     for category_name, tests in tests_category.items():
         print(category_name)
         for test in tests:
-            thread_manager.add_to_queu(_test, (test["title"], excutable, test['args'], test['exit'], f"{log_path}/{category_name}"))
+            thread_manager.add_to_queu(_test, (valgrind, test["title"], excutable, test['args'], test['exit'], f"{log_path}/{category_name}"))
         thread_manager.wait_pool()
         print("\n" * 1)
\ No newline at end of file
diff --git a/test/test.py b/test/test.py
index de23c42..ea5ad19 100644
--- a/test/test.py
+++ b/test/test.py
@@ -9,6 +9,7 @@ import parsing
 import execution
 
 excutable: str = sys.argv[1]
+valgrind: bool = bool(sys.argv[2])
 
 with open('test/tests.json', 'r') as file:
     tests: dict[str, dict] = json.load(file)
@@ -19,5 +20,5 @@ shutil.rmtree("log")
 
 for category_name, tests in tests.items():
     print(category_name, end="\n" * 2)
-    tester[category_name](excutable, tests, f"log/{category_name}")
+    tester[category_name](valgrind, excutable, tests, f"log/{category_name}")
     thread_manager.wait_pool()
\ No newline at end of file
diff --git a/test/tests.json b/test/tests.json
index ca9a539..1e21aa9 100644
--- a/test/tests.json
+++ b/test/tests.json
@@ -90,7 +90,8 @@
             },
             {
                 "title": "invalid",
-                "args": "domain.invalid"
+                "args": "domain.invalid",
+                "exit": 1
             }
         ],
         "payload_size": [