diff --git a/.clang-tidy b/.clang-tidy
index 447c4dd..97007d9 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -5,6 +5,7 @@
 Checks:         '*,
                 -cppcoreguidelines-non-private-member-variables-in-classes,
                 -fuchsia-default-arguments-calls,
+                -fuchsia-default-arguments-declarations,
                 -fuchsia-default-arguments,
                 -llvm-include-order,
                 -llvm-header-guard,
@@ -25,17 +26,18 @@ Checks:         '*,
                 -fuchsia-statically-constructed-objects,
                 -google-readability-todo,
                 -modernize-use-trailing-return-type'
-CheckOptions:   - { key: readability-identifier-naming.ClassCase,           value: CamelCase  }
+CheckOptions:   - { key: readability-identifier-naming.ClassCase,             value: CamelCase  }
                 # Clashes with constant private member prefix. (const int _var;)
-                # - { key: readability-identifier-naming.ConstantCase,        value: lower_case }
-                - { key: readability-identifier-naming.EnumCase,            value: lower_case }
-                - { key: readability-identifier-naming.FunctionCase,        value: lower_case }
-                - { key: readability-identifier-naming.MemberCase,          value: lower_case }
-                - { key: readability-identifier-naming.NamespaceCase,       value: lower_case }
-                - { key: readability-identifier-naming.ParameterCase,       value: lower_case }
-                - { key: readability-identifier-naming.PrivateMemberCase,   value: lower_case }
-                - { key: readability-identifier-naming.PrivateMemberPrefix, value: _          }
-                - { key: readability-identifier-naming.StructCase,          value: lower_case }
+                # - { key: readability-identifier-naming.ConstantCase,          value: lower_case }
+                - { key: readability-identifier-naming.EnumCase,              value: lower_case }
+                - { key: readability-identifier-naming.FunctionCase,          value: lower_case }
+                - { key: readability-identifier-naming.MemberCase,            value: lower_case }
+                - { key: readability-identifier-naming.ParameterCase,         value: lower_case }
+                - { key: readability-identifier-naming.PrivateMemberCase,     value: lower_case }
+                - { key: readability-identifier-naming.PrivateMemberPrefix,   value: _          }
+                - { key: readability-identifier-naming.ProtextedMemberCase,   value: lower_case }
+                - { key: readability-identifier-naming.ProtectedMemberPrefix, value: _          }
+                - { key: readability-identifier-naming.StructCase,            value: lower_case }
                 # Clashes with static private member prefix. (static int _var;)
-                # - { key: readability-identifier-naming.VariableCase,        value: lower_case }
+                # - { key: readability-identifier-naming.VariableCase,          value: lower_case }
 ...