diff --git a/maths/signum.py b/maths/signum.py
index 148f93176..c89753e76 100644
--- a/maths/signum.py
+++ b/maths/signum.py
@@ -7,12 +7,29 @@ def signum(num: float) -> int:
     """
     Applies signum function on the number
 
+    Custom test cases:
     >>> signum(-10)
     -1
     >>> signum(10)
     1
     >>> signum(0)
     0
+    >>> signum(-20.5)
+    -1
+    >>> signum(20.5)
+    1
+    >>> signum(-1e-6)
+    -1
+    >>> signum(1e-6)
+    1
+    >>> signum("Hello")
+    Traceback (most recent call last):
+        ...
+    TypeError: '<' not supported between instances of 'str' and 'int'
+    >>> signum([])
+    Traceback (most recent call last):
+        ...
+    TypeError: '<' not supported between instances of 'list' and 'int'
     """
     if num < 0:
         return -1
@@ -22,10 +39,17 @@ def signum(num: float) -> int:
 def test_signum() -> None:
     """
     Tests the signum function
+    >>> test_signum()
     """
     assert signum(5) == 1
     assert signum(-5) == -1
     assert signum(0) == 0
+    assert signum(10.5) == 1
+    assert signum(-10.5) == -1
+    assert signum(1e-6) == 1
+    assert signum(-1e-6) == -1
+    assert signum(123456789) == 1
+    assert signum(-123456789) == -1
 
 
 if __name__ == "__main__":