diff --git a/README.md b/README.md
index 076737245..328d4eb20 100644
--- a/README.md
+++ b/README.md
@@ -365,7 +365,7 @@ The above example can also be expressed explicitly using [`json::parse()`](https
 
 ```cpp
 // parse explicitly
-auto j3 = json::parse("{ \"happy\": true, \"pi\": 3.141 }");
+auto j3 = json::parse(R"({"happy": true, "pi": 3.141})");
 ```
 
 You can also get a string representation of a JSON value (serialize):
@@ -577,7 +577,7 @@ j[1] = 42;
 bool foo = j.at(2);
 
 // comparison
-j == "[\"foo\", 42, true]"_json;  // true
+j == R"(["foo", 1, true])"_json;  // true
 
 // other stuff
 j.size();     // 3 entries
diff --git a/include/nlohmann/detail/conversions/from_json.hpp b/include/nlohmann/detail/conversions/from_json.hpp
index faf1159f7..77b87036a 100644
--- a/include/nlohmann/detail/conversions/from_json.hpp
+++ b/include/nlohmann/detail/conversions/from_json.hpp
@@ -396,8 +396,8 @@ struct from_json_fn
 /// namespace to hold default `from_json` function
 /// to see why this is required:
 /// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
-namespace
+namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
 {
-constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value;
+constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value; // NOLINT(misc-definitions-in-headers)
 } // namespace
 } // namespace nlohmann
diff --git a/include/nlohmann/detail/conversions/to_json.hpp b/include/nlohmann/detail/conversions/to_json.hpp
index bc201a088..f5e4a1d3a 100644
--- a/include/nlohmann/detail/conversions/to_json.hpp
+++ b/include/nlohmann/detail/conversions/to_json.hpp
@@ -365,8 +365,10 @@ struct to_json_fn
 }  // namespace detail
 
 /// namespace to hold default `to_json` function
-namespace
+/// to see why this is required:
+/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
+namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
 {
-constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
+constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value; // NOLINT(misc-definitions-in-headers)
 } // namespace
 } // namespace nlohmann
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index cc9f2d6c0..096272912 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -3878,9 +3878,9 @@ struct from_json_fn
 /// namespace to hold default `from_json` function
 /// to see why this is required:
 /// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
-namespace
+namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
 {
-constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value;
+constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value; // NOLINT(misc-definitions-in-headers)
 } // namespace
 } // namespace nlohmann
 
@@ -4439,9 +4439,11 @@ struct to_json_fn
 }  // namespace detail
 
 /// namespace to hold default `to_json` function
-namespace
+/// to see why this is required:
+/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
+namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
 {
-constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
+constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value; // NOLINT(misc-definitions-in-headers)
 } // namespace
 } // namespace nlohmann
 
diff --git a/test/src/unit-readme.cpp b/test/src/unit-readme.cpp
index 3bf733948..07d3efc1b 100644
--- a/test/src/unit-readme.cpp
+++ b/test/src/unit-readme.cpp
@@ -123,7 +123,7 @@ TEST_CASE("README" * doctest::skip())
 
         {
             // create object from string literal
-            json j = "{ \"happy\": true, \"pi\": 3.141 }"_json;
+            json j = "{ \"happy\": true, \"pi\": 3.141 }"_json; // NOLINT(modernize-raw-string-literal)
 
             // or even nicer with a raw string literal
             auto j2 = R"(
@@ -134,7 +134,7 @@ TEST_CASE("README" * doctest::skip())
         )"_json;
 
             // or explicitly
-            auto j3 = json::parse("{ \"happy\": true, \"pi\": 3.141 }");
+            auto j3 = json::parse(R"({"happy": true, "pi": 3.141})");
 
             // explicit conversion to string
             std::string s = j.dump();    // {\"happy\":true,\"pi\":3.141}
@@ -158,17 +158,17 @@ TEST_CASE("README" * doctest::skip())
             j.push_back(true);
 
             // comparison
-            bool x = (j == "[\"foo\", 1, true]"_json);  // true
+            bool x = (j == R"(["foo", 1, true])");  // true
             CHECK(x == true);
 
             // iterate the array
-            for (json::iterator it = j.begin(); it != j.end(); ++it)
+            for (json::iterator it = j.begin(); it != j.end(); ++it) // NOLINT(modernize-loop-convert)
             {
                 std::cout << *it << '\n';
             }
 
             // range-based for
-            for (auto element : j)
+            for (auto& element : j)
             {
                 std::cout << element << '\n';
             }