diff --git a/maths/ceil.py b/maths/ceil.py
index 909e02b3f780..57f24998e1e6 100644
--- a/maths/ceil.py
+++ b/maths/ceil.py
@@ -1,6 +1,7 @@
 """
 https://en.wikipedia.org/wiki/Floor_and_ceiling_functions
 """
+import unittest
 
 
 def ceil(x: float) -> int:
@@ -14,11 +15,36 @@ def ceil(x: float) -> int:
     >>> all(ceil(n) == math.ceil(n) for n
     ...     in (1, -1, 0, -0, 1.1, -1.1, 1.0, -1.0, 1_000_000_000))
     True
+
+    >>> ceil("not_a_number")  # Add a test case with non-numeric input
+    Traceback (most recent call last):
+        ...
+    ValueError: Input must be a float or integer
     """
+    if not isinstance(x, (int, float)):
+        raise ValueError("Input must be a float or integer")
+
     return int(x) if x - int(x) <= 0 else int(x) + 1
 
 
+class TestCeil(unittest.TestCase):
+    def test_ceil_float(self):
+        self.assertEqual(ceil(1.5), 2)
+
+    def test_ceil_integer(self):
+        self.assertEqual(ceil(5), 5)
+
+    def test_ceil_negative(self):
+        self.assertEqual(ceil(-1.5), -1)
+
+    def test_ceil_non_numeric(self):
+        with self.assertRaises(ValueError) as context:
+            ceil("not_a_number")
+        self.assertEqual("Input must be a float or integer", str(context.exception))
+
+
 if __name__ == "__main__":
     import doctest
 
+    unittest.main()
     doctest.testmod()