diff --git a/include/async_mqtt5.hpp b/include/async_mqtt5.hpp
index 027dcfd..ca2032f 100644
--- a/include/async_mqtt5.hpp
+++ b/include/async_mqtt5.hpp
@@ -10,6 +10,7 @@
 
 #include <async_mqtt5/error.hpp>
 #include <async_mqtt5/logger.hpp>
+#include <async_mqtt5/logger_traits.hpp>
 #include <async_mqtt5/mqtt_client.hpp>
 #include <async_mqtt5/property_types.hpp>
 #include <async_mqtt5/reason_codes.hpp>
diff --git a/include/async_mqtt5/detail/log_invoke.hpp b/include/async_mqtt5/detail/log_invoke.hpp
index e8819bf..583f8ed 100644
--- a/include/async_mqtt5/detail/log_invoke.hpp
+++ b/include/async_mqtt5/detail/log_invoke.hpp
@@ -13,8 +13,8 @@
 
 #include <boost/asio/ip/tcp.hpp>
 #include <boost/system/error_code.hpp>
-#include <boost/type_traits/is_detected.hpp>
 
+#include <async_mqtt5/logger_traits.hpp>
 #include <async_mqtt5/reason_codes.hpp>
 #include <async_mqtt5/property_types.hpp>
 #include <async_mqtt5/types.hpp>
@@ -24,83 +24,12 @@ namespace async_mqtt5::detail {
 namespace asio = boost::asio;
 using boost::system::error_code;
 
-// NOOP Logger
-class noop_logger {};
-
-// at_resolve
-
-template <typename T>
-using at_resolve_sig = decltype(
-	std::declval<T&>().at_resolve(
-		std::declval<error_code>(),
-		std::declval<std::string_view>(), std::declval<std::string_view>(),
-		std::declval<const asio::ip::tcp::resolver::results_type&>()
-	)
-);
-template <typename T>
-constexpr bool has_at_resolve = boost::is_detected<at_resolve_sig, T>::value;
-
-// at_tcp_connect
-
-template <typename T>
-using at_tcp_connect_sig = decltype(
-	std::declval<T&>().at_tcp_connect(
-		std::declval<error_code>(), std::declval<asio::ip::tcp::endpoint>()
-	)
-);
-template <typename T>
-constexpr bool has_at_tcp_connect = boost::is_detected<at_tcp_connect_sig, T>::value;
-
-// at_tls_handshake
-
-template <typename T>
-using at_tls_handshake_sig = decltype(
-	std::declval<T&>().at_tls_handshake(
-		std::declval<error_code>(), std::declval<asio::ip::tcp::endpoint>()
-	)
-);
-template <typename T>
-constexpr bool has_at_tls_handshake = boost::is_detected<at_tls_handshake_sig, T>::value;
-
-// at_ws_handshake
-
-template <typename T>
-using at_ws_handshake_sig = decltype(
-	std::declval<T&>().at_ws_handshake(
-		std::declval<error_code>(), std::declval<asio::ip::tcp::endpoint>()
-	)
-);
-template <typename T>
-constexpr bool has_at_ws_handshake = boost::is_detected<at_ws_handshake_sig, T>::value;
-
-// at_connack
-
-template <typename T>
-using at_connack_sig = decltype(
-	std::declval<T&>().at_connack(
-		std::declval<reason_code>(),
-		std::declval<bool>(), std::declval<const connack_props&>()
-	)
-);
-template <typename T>
-constexpr bool has_at_connack = boost::is_detected<at_connack_sig, T>::value;
-
-// at_disconnect
-template <typename T>
-using at_disconnect_sig = decltype(
-	std::declval<T&>().at_disconnect(
-		std::declval<reason_code>(), std::declval<const disconnect_props&>()
-	)
-);
-template <typename T>
-constexpr bool has_at_disconnect = boost::is_detected<at_disconnect_sig, T>::value;
-
-template <typename LoggerType = noop_logger>
+template <typename LoggerType>
 class log_invoke {
 	LoggerType _logger;
 public:
-	explicit log_invoke(LoggerType&& logger = {}) :
-		_logger(std::forward<LoggerType>(logger))
+	explicit log_invoke(LoggerType logger = {}) :
+		_logger(std::move(logger))
 	{}
 
 	void at_resolve(
diff --git a/include/async_mqtt5/impl/codecs/traits.hpp b/include/async_mqtt5/detail/traits.hpp
similarity index 95%
rename from include/async_mqtt5/impl/codecs/traits.hpp
rename to include/async_mqtt5/detail/traits.hpp
index 715f265..5a47fa9 100644
--- a/include/async_mqtt5/impl/codecs/traits.hpp
+++ b/include/async_mqtt5/detail/traits.hpp
@@ -16,7 +16,7 @@
 #include <boost/range/iterator_range_core.hpp>
 #include <boost/type_traits/remove_cv_ref.hpp>
 
-namespace async_mqtt5 {
+namespace async_mqtt5::detail {
 
 template <typename>
 constexpr bool is_optional_impl = false;
@@ -58,6 +58,6 @@ constexpr bool is_boost_iterator = is_specialization<
 	boost::remove_cv_ref_t<T>, boost::iterator_range
 >;
 
-} // end namespace async_mqtt5
+} // end namespace async_mqtt5::detail
 
 #endif // !ASYNC_MQTT5_TRAITS_HPP
diff --git a/include/async_mqtt5/impl/codecs/base_decoders.hpp b/include/async_mqtt5/impl/codecs/base_decoders.hpp
index 1bfe8e5..9c95391 100644
--- a/include/async_mqtt5/impl/codecs/base_decoders.hpp
+++ b/include/async_mqtt5/impl/codecs/base_decoders.hpp
@@ -19,7 +19,7 @@
 #include <boost/optional/optional.hpp>
 
 #include <async_mqtt5/property_types.hpp>
-#include <async_mqtt5/impl/codecs/traits.hpp>
+#include <async_mqtt5/detail/traits.hpp>
 
 namespace async_mqtt5::decoders {
 
@@ -80,7 +80,7 @@ constexpr auto to(T& arg) {
 	return [&](auto& ctx) {
 		using ctx_type = decltype(ctx);
 		using attr_type = decltype(x3::_attr(std::declval<const ctx_type&>()));
-		if constexpr (is_boost_iterator<attr_type>)
+		if constexpr (detail::is_boost_iterator<attr_type>)
 			arg = T { x3::_attr(ctx).begin(), x3::_attr(ctx).end() };
 		else
 			arg = x3::_attr(ctx);
@@ -289,8 +289,8 @@ struct len_prefix_parser : x3::parser<len_prefix_parser> {
 	}
 };
 
-constexpr len_prefix_parser utf8_{};
-constexpr len_prefix_parser binary_{};
+constexpr len_prefix_parser utf8_ {};
+constexpr len_prefix_parser binary_ {};
 
 /*
 	 Boost Spirit incorrectly deduces atribute type for a parser of the form
@@ -362,6 +362,7 @@ bool parse_to_prop(
 	It& iter, const It last,
 	const Ctx& ctx, RCtx& rctx, Prop& prop
 ) {
+	using namespace async_mqtt5::detail;
 	using prop_type = std::remove_reference_t<decltype(prop)>;
 
 	bool rv = false;
diff --git a/include/async_mqtt5/impl/codecs/base_encoders.hpp b/include/async_mqtt5/impl/codecs/base_encoders.hpp
index e30ee2d..db73163 100644
--- a/include/async_mqtt5/impl/codecs/base_encoders.hpp
+++ b/include/async_mqtt5/impl/codecs/base_encoders.hpp
@@ -20,7 +20,7 @@
 #include <boost/type_traits/remove_cv_ref.hpp>
 
 #include <async_mqtt5/property_types.hpp>
-#include <async_mqtt5/impl/codecs/traits.hpp>
+#include <async_mqtt5/detail/traits.hpp>
 
 namespace async_mqtt5::encoders {
 
@@ -72,7 +72,7 @@ public:
 	template <
 		typename T,
 		typename projection = boost::identity,
-		std::enable_if_t<is_optional<T>, bool> = true
+		std::enable_if_t<detail::is_optional<T>, bool> = true
 	>
 	auto operator()(T&& value, projection proj = {}) const {
 		if constexpr (std::is_same_v<projection, boost::identity>) {
@@ -89,7 +89,7 @@ public:
 	template <
 		typename T,
 		typename projection = boost::identity,
-		std::enable_if_t<!is_optional<T>, bool> = true
+		std::enable_if_t<!detail::is_optional<T>, bool> = true
 	>
 	auto operator()(T&& value, projection proj = {}) const {
 		auto val = static_cast<repr>(std::invoke(proj, value));
@@ -125,7 +125,7 @@ public:
 	int_val(T val) : _val(val) {}
 
 	size_t byte_size() const {
-		if constexpr (is_optional<T>) {
+		if constexpr (detail::is_optional<T>) {
 			if (_val) return val_length(*_val);
 			return 0;
 		}
@@ -134,7 +134,7 @@ public:
 	}
 
 	std::string& encode(std::string& s) const {
-		if constexpr (is_optional<T>) {
+		if constexpr (detail::is_optional<T>) {
 			if (_val) return encode_val(s, *_val);
 			return s;
 		}
@@ -176,7 +176,7 @@ public:
 
 	template <typename T, typename projection>
 	auto operator()(T&& val, projection proj) const {
-		if constexpr (is_optional<T>) {
+		if constexpr (detail::is_optional<T>) {
 			using rv_type = std::invoke_result_t<
 				projection, typename boost::remove_cv_ref_t<T>::value_type
 			>;
@@ -211,14 +211,14 @@ public:
 	}
 
 	size_t byte_size() const {
-		if constexpr (is_optional<T>)
+		if constexpr (detail::is_optional<T>)
 			return _val ? _with_length * 2 + val_length(*_val) : 0;
 		else
 			return _with_length * 2 + val_length(_val);
 	}
 
 	std::string& encode(std::string& s) const {
-		if constexpr (is_optional<T>) {
+		if constexpr (detail::is_optional<T>) {
 			if (_val) return encode_val(s, *_val);
 			return s;
 		}
@@ -268,7 +268,7 @@ public:
 
 	template <typename T, typename projection>
 	auto operator()(T&& val, projection proj) const {
-		if constexpr (is_optional<T>) {
+		if constexpr (detail::is_optional<T>) {
 			using rv_type = std::invoke_result_t<
 				projection, typename boost::remove_cv_ref_t<T>::value_type
 			>;
@@ -346,7 +346,7 @@ auto encoder_for_prop_value(const T& val) {
 		return basic::int_def<uint32_t>{}(val);
 	else if constexpr (std::is_same_v<T, std::string>)
 		return basic::utf8_def{}(val);
-	else if constexpr (is_pair<T>)
+	else if constexpr (detail::is_pair<T>)
 		return encoder_for_prop_value(val.first) &
 			encoder_for_prop_value(val.second);
 }
@@ -359,7 +359,7 @@ template <
 >
 class prop_val<
 	T, p,
-	std::enable_if_t<!is_vector<T> && is_optional<T>>
+	std::enable_if_t<!detail::is_vector<T> && detail::is_optional<T>>
 > : public basic::encoder {
 	// allows T to be reference type to std::optional
 	static inline boost::remove_cv_ref_t<T> nulltype;
@@ -388,7 +388,7 @@ template <
 >
 class prop_val<
 	T, p,
-	std::enable_if_t<is_vector<T> || is_small_vector<T>>
+	std::enable_if_t<detail::is_vector<T> || detail::is_small_vector<T>>
 > : public basic::encoder {
 	// allows T to be reference type to std::vector
 	static inline boost::remove_cv_ref_t<T> nulltype;
@@ -490,7 +490,7 @@ class props_def {
 public:
 	template <typename T>
 	auto operator()(T&& prop_container) const {
-		if constexpr (is_optional<T>) {
+		if constexpr (detail::is_optional<T>) {
 			if (prop_container.has_value())
 				return (*this)(*prop_container);
 			return props_val<
diff --git a/include/async_mqtt5/impl/run_op.hpp b/include/async_mqtt5/impl/run_op.hpp
index fb19196..b8d7eab 100644
--- a/include/async_mqtt5/impl/run_op.hpp
+++ b/include/async_mqtt5/impl/run_op.hpp
@@ -54,10 +54,10 @@ public:
 			});
 	}
 
-	run_op(run_op&&) noexcept = default;
+	run_op(run_op&&) = default;
 	run_op(const run_op&) = delete;
 
-	run_op& operator=(run_op&&) noexcept = default;
+	run_op& operator=(run_op&&) = default;
 	run_op& operator=(const run_op&) = delete;
 
 	using allocator_type = asio::associated_allocator_t<handler_type>;
diff --git a/include/async_mqtt5/logger.hpp b/include/async_mqtt5/logger.hpp
index b390a14..2744eb0 100644
--- a/include/async_mqtt5/logger.hpp
+++ b/include/async_mqtt5/logger.hpp
@@ -8,17 +8,19 @@
 #ifndef ASYNC_MQTT5_LOGGER_HPP
 #define ASYNC_MQTT5_LOGGER_HPP
 
+#include <cstdint>
 #include <iostream>
 #include <string_view>
 
-#include <boost/system/error_code.hpp>
 #include <boost/asio/ip/tcp.hpp>
+#include <boost/system/error_code.hpp>
+#include <boost/type_traits/remove_cv_ref.hpp>
 
+#include <async_mqtt5/logger_traits.hpp>
 #include <async_mqtt5/reason_codes.hpp>
 #include <async_mqtt5/property_types.hpp>
 #include <async_mqtt5/types.hpp>
-
-#include <async_mqtt5/impl/codecs/traits.hpp>
+#include <async_mqtt5/detail/traits.hpp>
 
 namespace async_mqtt5 {
 
@@ -83,7 +85,7 @@ public:
 		if (!ec && _level < log_level::info)
 			return;
 
-		write_prefix();
+		output_prefix();
 		std::clog
 			<< "resolve: "
 			<< host << ":" << port;
@@ -110,7 +112,7 @@ public:
 		if (!ec && _level < log_level::info)
 			return;
 
-		write_prefix();
+		output_prefix();
 		std::clog
 			<< "connect: "
 			<< ep.address().to_string() << ":" << ep.port()
@@ -128,7 +130,7 @@ public:
 		if (!ec && _level < log_level::info)
 			return;
 
-		write_prefix();
+		output_prefix();
 		std::clog
 			<< "TLS handshake: "
 			<< ep.address().to_string() << ":" << ep.port()
@@ -146,7 +148,7 @@ public:
 		if (!ec && _level < log_level::info)
 			return;
 
-		write_prefix();
+		output_prefix();
 		std::clog
 			<< "WebSocket handshake: "
 			<< ep.address().to_string() << ":" << ep.port()
@@ -165,13 +167,17 @@ public:
 	 */
 	void at_connack(
 		reason_code rc,
-		bool /* session_present */, const connack_props& /* ca_props */
+		bool session_present, const connack_props& ca_props
 	) {
 		if (!rc && _level < log_level::info)
 			return;
 
-		write_prefix();
+		output_prefix();
 		std::clog << "connack: " << rc.message() << ".";
+		if (_level == log_level::debug) {
+			std::clog << " session_present:" << session_present << " ";
+			output_props(ca_props);
+		}
 		std::clog << std::endl;
 	}
 
@@ -183,19 +189,67 @@ public:
 	 * \param dc_props \__DISCONNECT_PROPS\__ received in the \__DISCONNECT\__ packet.
 	 */
 	void at_disconnect(reason_code rc, const disconnect_props& dc_props) {
-		write_prefix();
+		output_prefix();
 		std::clog << "disconnect: " << rc.message() << ".";
-		if (dc_props[prop::reason_string].has_value())
-			std::clog << " Reason string: " << * dc_props[prop::reason_string];
+		if (_level == log_level::debug)
+			output_props(dc_props);
 		std::clog << std::endl;
 	}
 
 private:
-	void write_prefix() {
+	void output_prefix() {
 		std::clog << prefix << " ";
 	}
+
+	template <typename Props>
+	void output_props(const Props& props) {
+		props.visit(
+			[](const auto& prop, const auto& val) -> bool {
+				if constexpr (detail::is_optional<decltype(val)>) {
+					if (val.has_value()) {
+						std::clog << property_name(prop) << ":";
+						using value_type = boost::remove_cv_ref_t<decltype(*val)>;
+						if constexpr (std::is_same_v<value_type, uint8_t>)
+							std::clog << std::to_string(*val) << " ";
+						else
+							std::clog << *val << " ";
+					}
+				} else { // is vector
+					if (val.empty())
+						return true;
+
+					std::clog << property_name(prop) << ":";
+					std::clog << "[";
+					for (auto i = 0; i < val.size(); i++) {
+						if constexpr (detail::is_pair<decltype(val[i])>)
+							std::clog << "(" << val[i].first << "," << val[i].second << ")";
+						else
+							std::clog << std::to_string(val[i]);
+						if (i + 1 < val.size())
+							std::clog << ", ";
+					}
+					std::clog << "]";
+				}
+				return true;
+			}
+		);
+	}
+
+	template <prop::property_type p>
+	static std::string_view property_name(std::integral_constant<prop::property_type, p>) {
+		return prop::name_v<p>;
+	}
+
 };
 
+// Verify that the logger class satisfies the LoggerType concept
+static_assert(has_at_resolve<logger>);
+static_assert(has_at_tcp_connect<logger>);
+static_assert(has_at_tls_handshake<logger>);
+static_assert(has_at_ws_handshake<logger>);
+static_assert(has_at_connack<logger>);
+static_assert(has_at_disconnect<logger>);
+
 } // end namespace async_mqtt5
 
 
diff --git a/include/async_mqtt5/logger_traits.hpp b/include/async_mqtt5/logger_traits.hpp
new file mode 100644
index 0000000..94554b3
--- /dev/null
+++ b/include/async_mqtt5/logger_traits.hpp
@@ -0,0 +1,103 @@
+//
+// Copyright (c) 2023-2024 Ivica Siladic, Bruno Iljazovic, Korina Simicevic
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef ASYNC_MQTT5_LOGGER_TRAITS_HPP
+#define ASYNC_MQTT5_LOGGER_TRAITS_HPP
+
+#include <iostream>
+#include <string_view>
+#include <type_traits>
+
+#include <boost/asio/ip/tcp.hpp>
+#include <boost/system/error_code.hpp>
+#include <boost/type_traits/is_detected.hpp>
+
+#include <async_mqtt5/reason_codes.hpp>
+#include <async_mqtt5/property_types.hpp>
+#include <async_mqtt5/types.hpp>
+
+namespace async_mqtt5 {
+
+namespace asio = boost::asio;
+using boost::system::error_code;
+
+// NOOP Logger
+class noop_logger {};
+
+// at_resolve
+
+template <typename T>
+using at_resolve_sig = decltype(
+	std::declval<T&>().at_resolve(
+		std::declval<error_code>(),
+		std::declval<std::string_view>(), std::declval<std::string_view>(),
+		std::declval<const asio::ip::tcp::resolver::results_type&>()
+	)
+);
+template <typename T>
+constexpr bool has_at_resolve = boost::is_detected<at_resolve_sig, T>::value;
+
+// at_tcp_connect
+
+template <typename T>
+using at_tcp_connect_sig = decltype(
+	std::declval<T&>().at_tcp_connect(
+		std::declval<error_code>(), std::declval<asio::ip::tcp::endpoint>()
+	)
+);
+template <typename T>
+constexpr bool has_at_tcp_connect = boost::is_detected<at_tcp_connect_sig, T>::value;
+
+// at_tls_handshake
+
+template <typename T>
+using at_tls_handshake_sig = decltype(
+	std::declval<T&>().at_tls_handshake(
+		std::declval<error_code>(), std::declval<asio::ip::tcp::endpoint>()
+	)
+);
+template <typename T>
+constexpr bool has_at_tls_handshake = boost::is_detected<at_tls_handshake_sig, T>::value;
+
+// at_ws_handshake
+
+template <typename T>
+using at_ws_handshake_sig = decltype(
+	std::declval<T&>().at_ws_handshake(
+		std::declval<error_code>(), std::declval<asio::ip::tcp::endpoint>()
+	)
+);
+template <typename T>
+constexpr bool has_at_ws_handshake = boost::is_detected<at_ws_handshake_sig, T>::value;
+
+// at_connack
+
+template <typename T>
+using at_connack_sig = decltype(
+	std::declval<T&>().at_connack(
+		std::declval<reason_code>(),
+		std::declval<bool>(), std::declval<const connack_props&>()
+	)
+);
+template <typename T>
+constexpr bool has_at_connack = boost::is_detected<at_connack_sig, T>::value;
+
+// at_disconnect
+
+template <typename T>
+using at_disconnect_sig = decltype(
+	std::declval<T&>().at_disconnect(
+		std::declval<reason_code>(), std::declval<const disconnect_props&>()
+	)
+);
+template <typename T>
+constexpr bool has_at_disconnect = boost::is_detected<at_disconnect_sig, T>::value;
+
+} // end namespace async_mqtt5
+
+
+#endif // !ASYNC_MQTT5_LOGGER_TRAITS_HPP
diff --git a/include/async_mqtt5/mqtt_client.hpp b/include/async_mqtt5/mqtt_client.hpp
index 8f6a36a..f83942e 100644
--- a/include/async_mqtt5/mqtt_client.hpp
+++ b/include/async_mqtt5/mqtt_client.hpp
@@ -18,6 +18,7 @@
 #include <boost/system/error_code.hpp>
 
 #include <async_mqtt5/error.hpp>
+#include <async_mqtt5/logger_traits.hpp>
 #include <async_mqtt5/types.hpp>
 
 #include <async_mqtt5/detail/log_invoke.hpp>
@@ -52,7 +53,7 @@ namespace asio = boost::asio;
 template <
 	typename StreamType,
 	typename TlsContext = std::monostate,
-	typename LoggerType = detail::noop_logger
+	typename LoggerType = noop_logger
 >
 class mqtt_client {
 public:
@@ -134,7 +135,6 @@ public:
 	 */
 	mqtt_client(mqtt_client&&) noexcept = default;
 
-
 	/**
 	 * \brief Move assignment operator.
 	 *
@@ -163,7 +163,6 @@ public:
 		return _impl->get_executor();
 	}
 
-
 	/**
 	 * \brief Get the context object used in TLS/SSL connection.
 	 *
diff --git a/include/async_mqtt5/property_types.hpp b/include/async_mqtt5/property_types.hpp
index aca5a09..6ee87a1 100644
--- a/include/async_mqtt5/property_types.hpp
+++ b/include/async_mqtt5/property_types.hpp
@@ -12,6 +12,7 @@
 #include <functional>
 #include <optional>
 #include <string>
+#include <string_view>
 #include <tuple>
 #include <type_traits>
 #include <vector>
diff --git a/test/include/test_common/packet_util.hpp b/test/include/test_common/packet_util.hpp
index f7eb7cc..3408a23 100644
--- a/test/include/test_common/packet_util.hpp
+++ b/test/include/test_common/packet_util.hpp
@@ -20,9 +20,9 @@
 #include <boost/range/algorithm/transform.hpp>
 
 #include <async_mqtt5/detail/control_packet.hpp>
+#include <async_mqtt5/detail/traits.hpp>
 #include <async_mqtt5/impl/codecs/message_decoders.hpp>
 #include <async_mqtt5/impl/codecs/message_encoders.hpp>
-#include <async_mqtt5/impl/codecs/traits.hpp>
 
 namespace async_mqtt5::test {
 
@@ -89,6 +89,7 @@ template <typename Props>
 inline std::string to_readable_props(Props props) {
 	std::ostringstream stream;
 	props.visit([&stream](const auto&, const auto& v) -> bool {
+		using namespace async_mqtt5::detail;
 		if constexpr (is_optional<decltype(v)>)
 			if (v.has_value())
 				stream << *v << " ";
diff --git a/test/include/test_common/test_autoconnect_stream.hpp b/test/include/test_common/test_autoconnect_stream.hpp
index 9b8a1a5..c4aa107 100644
--- a/test/include/test_common/test_autoconnect_stream.hpp
+++ b/test/include/test_common/test_autoconnect_stream.hpp
@@ -30,7 +30,7 @@ using error_code = boost::system::error_code;
 template <
 	typename StreamType,
 	typename StreamContext = std::monostate,
-	typename LoggerType = async_mqtt5::detail::noop_logger
+	typename LoggerType = async_mqtt5::noop_logger
 >
 class test_autoconnect_stream {
 public:
diff --git a/test/integration/client_functions.cpp b/test/integration/client_functions.cpp
index f7214b0..5319a68 100644
--- a/test/integration/client_functions.cpp
+++ b/test/integration/client_functions.cpp
@@ -23,6 +23,7 @@
 
 #include <async_mqtt5/mqtt_client.hpp>
 #include <async_mqtt5/types.hpp>
+#include <async_mqtt5/detail/traits.hpp>
 
 #include "test_common/message_exchange.hpp"
 #include "test_common/packet_util.hpp"
@@ -406,7 +407,7 @@ BOOST_FIXTURE_TEST_CASE(connack_properties, shared_connack_prop_test_data) {
 			connack_props cprops_ = c.connack_properties();
 			cprops_.visit([&](const auto& p, const auto& val) -> bool {
 				BOOST_TEST_REQUIRE(p);
-				if constexpr (is_vector<decltype(val)>)
+				if constexpr (detail::is_vector<decltype(val)>)
 					BOOST_TEST(val == cprops[p]);
 				else {
 					BOOST_TEST_REQUIRE(val.has_value());
@@ -429,7 +430,7 @@ BOOST_FIXTURE_TEST_CASE(connack_property, shared_connack_prop_test_data) {
 		std::move(broker_side),
 		[&](client_type& c) {
 			cprops.visit([&](const auto& p, const auto& val) -> bool{
-				if constexpr (is_vector<decltype(val)>)
+				if constexpr (detail::is_vector<decltype(val)>)
 					BOOST_TEST(val == c.connack_property(p));
 				else {
 					BOOST_TEST_REQUIRE(val.has_value());
diff --git a/test/integration/executors.cpp b/test/integration/executors.cpp
index 88870d5..04bb93c 100644
--- a/test/integration/executors.cpp
+++ b/test/integration/executors.cpp
@@ -34,7 +34,11 @@ using strand_type = asio::strand<asio::any_io_executor>;
 
 BOOST_AUTO_TEST_SUITE(executors)
 
-void run_test(asio::io_context& ioc, strand_type io_ex, auto bind_async_run, auto bind_async_op) {
+template <typename AsyncRunOp, typename AsyncOp>
+void run_test(
+	asio::io_context& ioc, strand_type io_ex,
+	AsyncRunOp&& bind_async_run, AsyncOp&& bind_async_op
+) {
 	using test::after;
 	using namespace std::chrono_literals;
 
diff --git a/test/integration/receive_publish.cpp b/test/integration/receive_publish.cpp
index bac0a6e..df9f0d4 100644
--- a/test/integration/receive_publish.cpp
+++ b/test/integration/receive_publish.cpp
@@ -473,7 +473,7 @@ BOOST_FIXTURE_TEST_CASE(receive_buffer_overflow, shared_test_data) {
 		.async_run(asio::detached);
 
 	asio::steady_timer timer(executor);
-	timer.expires_after(7s);
+	timer.expires_after(10s);
 	timer.async_wait(
 		[&](error_code) {
 			c.async_receive([&](
diff --git a/test/unit/connect_op.cpp b/test/unit/connect_op.cpp
index 239e03c..1554a03 100644
--- a/test/unit/connect_op.cpp
+++ b/test/unit/connect_op.cpp
@@ -16,6 +16,7 @@
 #include <boost/asio/steady_timer.hpp>
 #include <boost/asio/ip/tcp.hpp>
 
+#include <async_mqtt5/logger_traits.hpp>
 #include <async_mqtt5/types.hpp>
 #include <async_mqtt5/detail/log_invoke.hpp>
 #include <async_mqtt5/detail/internal_types.hpp>
@@ -65,8 +66,8 @@ void run_unit_test(
 		std::move(h)(ec);
 	};
 
-	detail::log_invoke d;
-	detail::connect_op<test::test_stream, detail::noop_logger>(
+	detail::log_invoke<noop_logger> d;
+	detail::connect_op<test::test_stream, noop_logger>(
 		stream, mqtt_ctx, d, std::move(handler)
 	).perform(*std::begin(eps), std::move(ap));
 
diff --git a/test/unit/logger.cpp b/test/unit/logger.cpp
index 14cedbd..2f063b5 100644
--- a/test/unit/logger.cpp
+++ b/test/unit/logger.cpp
@@ -25,6 +25,7 @@
 
 #include <async_mqtt5/mqtt_client.hpp>
 #include <async_mqtt5/logger.hpp>
+#include <async_mqtt5/logger_traits.hpp>
 
 #include "test_common/message_exchange.hpp"
 #include "test_common/test_service.hpp"
@@ -54,12 +55,12 @@ void assign_tls_sni(
 
 
 void logger_test() {
-	BOOST_STATIC_ASSERT(detail::has_at_resolve<logger>);
-	BOOST_STATIC_ASSERT(detail::has_at_tcp_connect<logger>);
-	BOOST_STATIC_ASSERT(detail::has_at_tls_handshake<logger>);
-	BOOST_STATIC_ASSERT(detail::has_at_ws_handshake<logger>);
-	BOOST_STATIC_ASSERT(detail::has_at_connack<logger>);
-	BOOST_STATIC_ASSERT(detail::has_at_disconnect<logger>);
+	BOOST_STATIC_ASSERT(has_at_resolve<logger>);
+	BOOST_STATIC_ASSERT(has_at_tcp_connect<logger>);
+	BOOST_STATIC_ASSERT(has_at_tls_handshake<logger>);
+	BOOST_STATIC_ASSERT(has_at_ws_handshake<logger>);
+	BOOST_STATIC_ASSERT(has_at_connack<logger>);
+	BOOST_STATIC_ASSERT(has_at_disconnect<logger>);
 }
 
 using stream_type = boost::beast::websocket::stream<
diff --git a/test/unit/reconnect_op.cpp b/test/unit/reconnect_op.cpp
index b072307..3cf63a5 100644
--- a/test/unit/reconnect_op.cpp
+++ b/test/unit/reconnect_op.cpp
@@ -14,6 +14,7 @@
 #include <boost/asio/post.hpp>
 #include <boost/asio/prepend.hpp>
 
+#include <async_mqtt5/logger_traits.hpp>
 #include <async_mqtt5/detail/log_invoke.hpp>
 
 #include <async_mqtt5/impl/client_service.hpp>
@@ -113,7 +114,7 @@ void run_connect_to_localhost_test(int succeed_after) {
 	);
 
 	auto stream_ctx = stream_context(std::monostate {});
-	auto log = detail::log_invoke();
+	auto log = detail::log_invoke<noop_logger>();
 	auto auto_stream = astream(ioc.get_executor(), stream_ctx, log);
 	auto_stream.brokers("localhost", 1883);
 
@@ -147,7 +148,7 @@ BOOST_AUTO_TEST_CASE(no_servers) {
 
 	asio::io_context ioc;
 	auto stream_ctx = stream_context(std::monostate{});
-	auto log = detail::log_invoke();
+	auto log = detail::log_invoke<noop_logger>();
 	auto auto_stream = astream(ioc.get_executor(), stream_ctx, log);
 	auto_stream.brokers("", 1883);
 
diff --git a/test/unit/serialization.cpp b/test/unit/serialization.cpp
index 9fb63e9..30317df 100644
--- a/test/unit/serialization.cpp
+++ b/test/unit/serialization.cpp
@@ -692,7 +692,7 @@ BOOST_AUTO_TEST_CASE(test_pingresp) {
 
 BOOST_AUTO_TEST_CASE(subscription_identifiers) {
 	// check boost::container::small_vector interface
-	BOOST_TEST_REQUIRE(is_small_vector<prop::subscription_identifiers>);
+	BOOST_TEST_REQUIRE(detail::is_small_vector<prop::subscription_identifiers>);
 
 	// check optional interface
 	prop::subscription_identifiers sub_ids;