diff --git a/tests/test_predicate.py b/tests/test_predicate.py
index 6ef7d66..5b171f8 100644
--- a/tests/test_predicate.py
+++ b/tests/test_predicate.py
@@ -46,17 +46,22 @@ def setup_method(self):
         self.equal_to = EqualTo(self.left, self.right)
 
     def test_left(self):
+        """Test left getter."""
         assert self.equal_to.left == self.left
 
     def test_right(self):
+        """Test right getter."""
         assert self.equal_to.right == self.right
 
     def test_to_equal(self):
+        """Test to equal."""
         other = EqualTo(self.left, self.right)
         assert self.equal_to == other
 
     def test_to_str(self):
+        """Test to string."""
         assert str(self.equal_to) == f"(= {str(self.left)} {str(self.right)})"
 
     def test_to_repr(self):
-        assert repr(self.equal_to) == f"EqualTo({repr(self.left)}, {repr(self.right)})"
\ No newline at end of file
+        """Test to repr."""
+        assert repr(self.equal_to) == f"EqualTo({repr(self.left)}, {repr(self.right)})"