diff --git a/pyjavapoet/code_block.py b/pyjavapoet/code_block.py
index b935b6a..9451ed8 100644
--- a/pyjavapoet/code_block.py
+++ b/pyjavapoet/code_block.py
@@ -198,7 +198,7 @@ def add_javadoc(javadoc: Optional["CodeBlock"], format_string: str, *args) -> "C
             return CodeBlock.join_to_code([javadoc, CodeBlock.of(format_string, *args)])
         else:
             return CodeBlock.of(format_string, *args)
-        
+
     @staticmethod
     def add_javadoc_line(javadoc: Optional["CodeBlock"], format_string: str, *args) -> "CodeBlock":
         if javadoc:
@@ -271,7 +271,7 @@ def add_statement(self, format_string: str, *args, **kwargs) -> "CodeBlock.Build
                 self.add(format_string, *args, **kwargs)
                 self.add(";\n")
             return self
-        
+
         def add_line(self, format_string: str, *args, **kwargs) -> "CodeBlock.Builder":
             self.add(format_string, *args, **kwargs)
             self.add("\n")
diff --git a/pyjavapoet/field_spec.py b/pyjavapoet/field_spec.py
index fdf3f5e..f8690c7 100644
--- a/pyjavapoet/field_spec.py
+++ b/pyjavapoet/field_spec.py
@@ -141,7 +141,7 @@ def add_annotation(self, annotation_spec: "AnnotationSpec") -> "FieldSpec.Builde
         def add_javadoc(self, format_string: str, *args) -> "FieldSpec.Builder":
             self.__javadoc = CodeBlock.add_javadoc(self.__javadoc, format_string, *args)
             return self
-        
+
         def add_javadoc_line(self, format_string: str = EMPTY_STRING, *args) -> "FieldSpec.Builder":
             self.__javadoc = CodeBlock.add_javadoc_line(self.__javadoc, format_string, *args)
             return self
diff --git a/pyjavapoet/java_file.py b/pyjavapoet/java_file.py
index 2e0f998..692105d 100644
--- a/pyjavapoet/java_file.py
+++ b/pyjavapoet/java_file.py
@@ -184,7 +184,7 @@ def __init__(
         def add_file_comment(self, format_string: str = EMPTY_STRING, *args) -> "JavaFile.Builder":
             self.__file_comment = CodeBlock.add_javadoc(self.__file_comment, format_string, *args)
             return self
-        
+
         def add_file_comment_line(self, format_string: str = EMPTY_STRING, *args) -> "JavaFile.Builder":
             self.__file_comment = CodeBlock.add_javadoc_line(self.__file_comment, format_string, *args)
             return self
diff --git a/pyjavapoet/method_spec.py b/pyjavapoet/method_spec.py
index 70ac8e2..c1c6efe 100644
--- a/pyjavapoet/method_spec.py
+++ b/pyjavapoet/method_spec.py
@@ -264,7 +264,7 @@ def add_exception(self, exception: Union["TypeName", str, type]) -> "MethodSpec.
         def add_type_variable(self, type_variable: "TypeVariableName") -> "MethodSpec.Builder":
             self.__type_variables.append(type_variable)
             return self
-        
+
         def add_javadoc(self, format_string: str, *args) -> "MethodSpec.Builder":
             self.__javadoc = CodeBlock.add_javadoc(self.__javadoc, format_string, *args)
             return self
diff --git a/pyjavapoet/type_name.py b/pyjavapoet/type_name.py
index d79d455..3bccf1f 100644
--- a/pyjavapoet/type_name.py
+++ b/pyjavapoet/type_name.py
@@ -204,7 +204,7 @@ def get(type_mirror_or_name: Union[str, type, "TypeName", None]) -> "TypeName":
                 list: TypeName.LIST,
                 dict: TypeName.MAP,
                 set: TypeName.SET,
-                tuple: TypeName.LIST
+                tuple: TypeName.LIST,
             }
 
             if type_mirror_or_name in type_mapping:
diff --git a/pyjavapoet/type_spec.py b/pyjavapoet/type_spec.py
index 7481fe4..618daf7 100644
--- a/pyjavapoet/type_spec.py
+++ b/pyjavapoet/type_spec.py
@@ -438,7 +438,7 @@ def add_permitted_subclass(self, subclass: Union["TypeName", str, type]) -> "Typ
 
             self.__permitted_subclasses.append(subclass)
             return self
-        
+
         def add_javadoc(self, format_string: str, *args) -> "TypeSpec.Builder":
             self.__javadoc = CodeBlock.add_javadoc(self.__javadoc, format_string, *args)
             return self
diff --git a/tests/test_code_block.py b/tests/test_code_block.py
index db140c1..c103c6a 100644
--- a/tests/test_code_block.py
+++ b/tests/test_code_block.py
@@ -344,5 +344,6 @@ def test_add_raw_line(self):
         block = CodeBlock.builder().add_line("System.out.println($S);", "Hello, World!").build()
         self.assertEqual(str(block), 'System.out.println("Hello, World!");\n')
 
+
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/test_code_writer.py b/tests/test_code_writer.py
index ef88d0e..86c5ca2 100644
--- a/tests/test_code_writer.py
+++ b/tests/test_code_writer.py
@@ -66,8 +66,8 @@ def test_emit_with_nested_newlines_handling(self):
         result = str(writer)
         # The expected result:
         # // line1
-        # // 
-        # // 
+        # //
+        # //
         # // line2
         # // line3
         expected = "// line1\n// \n// \n// line2\n// line3"
diff --git a/tests/test_type_name.py b/tests/test_type_name.py
index d407482..7101307 100644
--- a/tests/test_type_name.py
+++ b/tests/test_type_name.py
@@ -115,7 +115,6 @@ def test_get_with_type_or_none(self):
         self.assertEqual(TypeName.get(tuple), TypeName.LIST)
         self.assertEqual(TypeName.get(None), TypeName.VOID)
 
-
     def test_is_primitive(self):
         """Test primitive type detection."""
         self.assertTrue(TypeName.get("boolean").is_primitive())
@@ -219,7 +218,7 @@ def test_parameterized_type_with_primitives(self):
             new_type = list_type.with_type_arguments(t)
             self.assertIn(c.simple_name, str(new_type))
             self.assertNotIn(t.simple_name, str(new_type))
-        
+
     def test_nested_parameterized_types(self):
         """Test deeply nested parameterized types."""
         map_type = ClassName.get("java.util", "Map").with_type_arguments(