diff --git a/src/problems/inside_test/fibonacci_test.py b/src/problems/inside_test/fibonacci_test.py
index 9ac046c..fcfa056 100644
--- a/src/problems/inside_test/fibonacci_test.py
+++ b/src/problems/inside_test/fibonacci_test.py
@@ -44,27 +44,6 @@ async def fibonacci_large_value_test(fibonacci_func: Callable[[int], int]) -> No
     WHEN fibonacci function is called
     THEN it should return correct value within timeout
     """
-    _functional_fibonacci = async_timeout(5000)(fibonacci_func)
+    _functional_fibonacci = async_timeout(1000)(fibonacci_func)
 
     assert await _functional_fibonacci(35) == 9227465, "F(35) should be 9227465"
-
-
-async def fibonacci_invalid_input_test(fibonacci_func: Callable[[int], int]) -> None:
-    """
-    GIVEN invalid inputs
-    WHEN fibonacci function is called
-    THEN it should raise appropriate exceptions
-    """
-    _functional_fibonacci = async_timeout(100)(fibonacci_func)
-
-    try:
-        await _functional_fibonacci(-1)
-        raise AssertionError("Negative input should raise ValueError")
-    except ValueError:
-        pass
-
-    try:
-        await _functional_fibonacci(1.5)
-        raise AssertionError("Non-integer input should raise TypeError")
-    except TypeError:
-        pass
diff --git a/tests/test_fibonacci.py b/tests/test_fibonacci.py
index 1c5434b..55b3c78 100644
--- a/tests/test_fibonacci.py
+++ b/tests/test_fibonacci.py
@@ -16,11 +16,6 @@ def correct_fibonacci(n: int) -> int:
     :param n: A non-negative integer
     :return: The nth Fibonacci number
     """
-    # check if input is valid
-    if not isinstance(n, int):
-        raise TypeError("Input must be an integer")
-    if n < 0:
-        raise ValueError("Input must be non-negative")
 
     # Base cases
     if n <= 1:
@@ -110,25 +105,6 @@ async def test_test_case_with_large_value_and_correct_function_then_success() ->
     await fibonacci_test.fibonacci_large_value_test(correct_fibonacci)
 
 
-async def test_test_case_with_invalid_input_and_base_function_then_error() -> None:
-    """
-    GIVEN a test case with invalid input and base function
-    WHEN the fibonacci function is called
-    THEN an AssertionError should be raised
-    """
-    with pytest.raises(AssertionError, match="Negative input should raise ValueError"):
-        await fibonacci_test.fibonacci_invalid_input_test(fibonacci)
-
-
-async def test_test_case_with_invalid_input_and_correct_function_then_success() -> None:
-    """
-    GIVEN a test case with invalid input and correct function
-    WHEN the fibonacci function is called
-    THEN any error should not be raised
-    """
-    await fibonacci_test.fibonacci_invalid_input_test(correct_fibonacci)
-
-
 async def test_test_case_with_large_value_and_slow_function_then_error() -> None:
     """
     GIVEN test case with large value and slow function