diff --git a/.travis.yml b/.travis.yml
index 66e5fac..b151bcb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,6 @@
 # and how it can be used with Boost libraries.
 #
 
-sudo: false
 language: cpp
 
 branches:
@@ -21,11 +20,8 @@ env:
     - CXX_STANDARD=c++14 BRANCH_TO_TEST=master
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=master
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.58.0
-    - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.58.0
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.59.0
-    - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.59.0
     - CXX_STANDARD=c++11 BRANCH_TO_TEST=boost-1.67.0
-    - CXX_STANDARD=c++98 BRANCH_TO_TEST=boost-1.67.0
 
 compiler:
   - clang
@@ -74,12 +70,12 @@ script:
     - cd $PROJECT_DIR/build
     - export BOOST_ROOT=$BOOST
     # `--coverage` flags required to generate coverage info for Coveralls
-    - ./build.sh --toolset=$CC "cxxflags=-std=$CXX_STANDARD -Wno-unused-local-typedefs -Wno-unused-function -Wno-deprecated-declarations --coverage" "linkflags=--coverage"
+    - ./build.sh --toolset=$CC "cxxflags=-std=$CXX_STANDARD -Wno-unused-local-typedefs -Wno-unused-function -Wno-deprecated-declarations --coverage" "linkflags=--coverage" -j3
     - cd $BOOST && ./b2 --with-test --with-thread --with-chrono --with-system --with-atomic --with-date_time -a -j3 # Build required libs
     - mkdir $PROJECT_DIR/__build && cd $PROJECT_DIR/__build
-    - export CXXFLAGS="-std=$CXX_STANDARD -Wall -Wextra"
+    - export CXXFLAGS="-std=$CXX_STANDARD"
     - cmake .. -DCMAKE_BUILD_TYPE=Debug
-    - cmake --build . --config Debug
+    - cmake --build . --config Debug -- -j3
     - ctest --output-on-failure --build-config Debug
 
 after_success:
diff --git a/README.md b/README.md
index a926488..8be3b04 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,5 @@ Distributed under the [Boost Software License, Version 1.0](http://boost.org/LIC
 [![Build Status](https://travis-ci.org/mat007/turtle.svg)](https://travis-ci.org/mat007/turtle)
 [![Build status](https://ci.appveyor.com/api/projects/status/459hvqkb5rts4hw7?svg=true)](https://ci.appveyor.com/project/mat007/turtle)
 [![Coverage Status](https://coveralls.io/repos/mat007/turtle/badge.png)](https://coveralls.io/r/mat007/turtle)
+
+Boost and a C++11 compatible compiler is required.
diff --git a/appveyor.yml b/appveyor.yml
index f20a17e..7e127c0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,6 +3,7 @@
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 #
 # Copyright Mathieu Champlon 2015.
+# Copyright Alexander Grund 2020.
 
 skip_branch_with_pr: true
 
@@ -24,17 +25,15 @@ environment:
       TOOLSET: msvc-14.1
       CXX_STANDARD: 14
       # CXX_STANDARD: 17
-
-platform:
-  - 32
-  - 64
-
-configuration:
-  - debug
-  - release
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      BOOST: 1_60_0
+      CMAKE: true
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      BOOST: 1_71_0
+      CMAKE: true
 
 install:
-  - cd C:\projects\turtle\doc
+  - cd %APPVEYOR_BUILD_FOLDER%\doc
   - appveyor-retry powershell Invoke-WebRequest ftp://ftp.zlatkovic.com/libxml/iconv-1.9.2.win32.zip -OutFile iconv.zip
   - 7z e iconv.zip iconv.dll -r
   - appveyor-retry powershell Invoke-WebRequest ftp://ftp.zlatkovic.com/libxml/libxml2-2.7.8.win32.zip -OutFile libxml2.zip
@@ -49,6 +48,20 @@ build_script:
   - set BOOST_ROOT=C:\Libraries\boost_%BOOST%
   - cd %BOOST_ROOT%
   - call bootstrap.bat
-  - cd C:\projects\turtle\build
+  - cd %APPVEYOR_BUILD_FOLDER%\build
   - if NOT "%CXX_STANDARD%"=="" set CXX_FLAGS=cxxflags=/std:c++%CXX_STANDARD%
-  - call build.bat --toolset=%TOOLSET% address-model=%PLATFORM% %CXX_FLAGS% --build-type=complete %CONFIGURATION%
+  - set BUILD_ARGS=address-model=32,64 variant=debug,release
+  - call build.bat --toolset=%TOOLSET% %CXX_FLAGS% -j3
+
+for:
+  - matrix:
+      only: [CMAKE: true]
+    install: true
+    build_script:
+      - set BOOST_ROOT=C:\Libraries\boost_%BOOST%
+      - cd %APPVEYOR_BUILD_FOLDER%
+      - mkdir __build
+      - cd __build
+      - cmake .. -DCMAKE_BUILD_TYPE=Debug
+      - cmake --build . --config Debug
+      - ctest --output-on-failure --build-config Debug
\ No newline at end of file
diff --git a/build/build.bat b/build/build.bat
index 2ae058b..a539b91 100644
--- a/build/build.bat
+++ b/build/build.bat
@@ -11,7 +11,7 @@ rem error if BOOST_ROOT not set
 set BOOST=%BOOST_ROOT%
 
 pushd ..\test
-%BOOST%\b2.exe -q %*
+%BOOST%\b2.exe -q %BUILD_ARGS% %*
 popd
 if errorlevel 1 exit /b %ERRORLEVEL%
 
diff --git a/include/turtle/constraint.hpp b/include/turtle/constraint.hpp
index 25aa160..887a22d 100644
--- a/include/turtle/constraint.hpp
+++ b/include/turtle/constraint.hpp
@@ -223,7 +223,7 @@ namespace detail
 
 #ifdef MOCK_VARIADIC_MACROS
 
-#if BOOST_MSVC
+#ifdef BOOST_MSVC
 #   define MOCK_VARIADIC_SIZE(...) \
         BOOST_PP_CAT(MOCK_VARIADIC_SIZE_I(__VA_ARGS__, \
             32, 31, 30, 29, 28, 27, 26, 25, 24, 23, \
diff --git a/include/turtle/detail/expectation_template.hpp b/include/turtle/detail/expectation_template.hpp
index 030a062..20bf6f4 100644
--- a/include/turtle/detail/expectation_template.hpp
+++ b/include/turtle/detail/expectation_template.hpp
@@ -29,6 +29,9 @@
 #define MOCK_REF_ARG(z, n, d) \
     typename ref_arg< T##n >::type a##n
 
+#define MOCK_REF_ARG_T(z, n, d) \
+    typename ref_arg< T##n >::type
+
 namespace mock
 {
 namespace detail
@@ -42,7 +45,7 @@ namespace detail
     {
     private:
         virtual bool operator()(
-            BOOST_PP_ENUM(MOCK_NUM_ARGS, MOCK_REF_ARG, _) )
+            BOOST_PP_ENUM(MOCK_NUM_ARGS, MOCK_REF_ARG_T, _) )
         {
             return true;
         }
@@ -269,4 +272,5 @@ namespace detail
 #undef MOCK_EXPECTATION_SERIALIZE_ANY
 #undef MOCK_EXPECTATION_PARAM
 #undef MOCK_REF_ARG
+#undef MOCK_REF_ARG_T
 #undef MOCK_RV_REF
diff --git a/include/turtle/detail/mutex.hpp b/include/turtle/detail/mutex.hpp
index 18ae0a5..b5dcb35 100644
--- a/include/turtle/detail/mutex.hpp
+++ b/include/turtle/detail/mutex.hpp
@@ -103,9 +103,9 @@ namespace detail
         {}
         ~lock()
         {}
-        lock( BOOST_RV_REF( lock ) x )
+        lock( BOOST_RV_REF( lock ) )
         {}
-        lock& operator=( BOOST_RV_REF( lock ) x )
+        lock& operator=( BOOST_RV_REF( lock ) )
         {
             return *this;
         }
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 4f16ac8..9c79747 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -4,11 +4,30 @@
 
 find_package(Boost 1.58 REQUIRED COMPONENTS unit_test_framework thread)
 
-add_library(TurtleTestMain STATIC main.cpp)
-target_link_libraries(TurtleTestMain PUBLIC Boost::unit_test_framework Boost::disable_autolinking)
+add_library(TurtleTestMain INTERFACE)
+target_link_libraries(TurtleTestMain INTERFACE Boost::unit_test_framework Boost::disable_autolinking)
+target_compile_definitions(TurtleTestMain INTERFACE BOOST_AUTO_TEST_MAIN)
 # Heuristically guess if we are compiling against dynamic boost
 if(NOT Boost_USE_STATIC_LIBS AND Boost_UNIT_TEST_FRAMEWORK_LIBRARY AND NOT Boost_UNIT_TEST_FRAMEWORK_LIBRARY MATCHES "\\${CMAKE_STATIC_LIBRARY_SUFFIX}\$")
-    target_compile_definitions(TurtleTestMain PUBLIC BOOST_TEST_DYN_LINK)
+    target_compile_definitions(TurtleTestMain INTERFACE BOOST_TEST_DYN_LINK)
+endif()
+# Enable warnings
+option(TURTLE_WERROR "Treat warnings as errors" ON)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  target_compile_options(TurtleTestMain INTERFACE -Wall -Wextra -pedantic -Wno-long-long)
+  include(CheckCXXCompilerFlag)
+  check_cxx_compiler_flag(-Wunused-function TURTLE_CXX_UNUSED_FUNCTION)
+  if(TURTLE_CXX_UNUSED_FUNCTION)
+    target_compile_options(TurtleTestMain INTERFACE -Wno-unused-function)
+  endif()
+  if(TURTLE_WERROR)
+    target_compile_options(TurtleTestMain INTERFACE -Werror)
+  endif()
+elseif(MSVC)
+  target_compile_options(TurtleTestMain INTERFACE /W4)
+  if(TURTLE_WERROR)
+    target_compile_options(TurtleTestMain INTERFACE /WX)
+  endif()
 endif()
 
 file(GLOB_RECURSE testFiles test_*.cpp)
@@ -35,7 +54,7 @@ foreach(testFile IN LISTS testFiles)
   target_compile_definitions(${name}_thread_safe PRIVATE MOCK_THREAD_SAFE BOOST_THREAD_USES_MOVE)
 endforeach()
 
-add_executable(link-test_defined EXCLUDE_FROM_ALL defined_1.cpp defined_2.cpp)
+add_executable(link-test_defined EXCLUDE_FROM_ALL test_exception.cpp defined_1.cpp defined_2.cpp)
 target_link_libraries(link-test_defined PRIVATE turtle::turtle TurtleTestMain)
 add_test(NAME link-test_defined COMMAND "${CMAKE_COMMAND}" --build ${CMAKE_BINARY_DIR} --target link-test_defined --config $<CONFIG>)
 
diff --git a/test/Jamfile.jam b/test/Jamfile.jam
index 3eccba2..7b7cd14 100644
--- a/test/Jamfile.jam
+++ b/test/Jamfile.jam
@@ -26,11 +26,11 @@ alias mock_inspect :
 rule run-test ( name )
 {
   run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : : $(name)_ ;
-  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_MAX_ARGS=21 : $(name)_max_args ;
-  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_USE_CONVERSIONS : $(name)_use_conversions ;
-  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_DECLTYPE : $(name)_no_decltype ;
-  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_VARIADIC_MACROS : $(name)_no_variadic_macros ;
-  run $(name) defined_1.cpp defined_2.cpp undefined.cpp /boost//unit_test_framework /boost//thread : : : <define>MOCK_THREAD_SAFE <define>BOOST_THREAD_USES_MOVE <threading>multi : $(name)_thread_safe ;
+  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_MAX_ARGS=21 : $(name)_max_args ;
+  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_USE_CONVERSIONS : $(name)_use_conversions ;
+  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_DECLTYPE : $(name)_no_decltype ;
+  run $(name) undefined.cpp /boost//unit_test_framework : : : <define>MOCK_NO_VARIADIC_MACROS : $(name)_no_variadic_macros ;
+  run $(name) undefined.cpp /boost//unit_test_framework /boost//thread : : : <define>MOCK_THREAD_SAFE <define>BOOST_THREAD_USES_MOVE <threading>multi : $(name)_thread_safe ;
 }
 
 rule run-tests
diff --git a/test/main.cpp b/test/main.cpp
deleted file mode 100644
index 7045d4e..0000000
--- a/test/main.cpp
+++ /dev/null
@@ -1,10 +0,0 @@
-// http://turtle.sourceforge.net
-//
-// Copyright Mathieu Champlon 2009
-//
-// Distributed under the Boost Software License, Version 1.0.
-// (See accompanying file LICENSE_1_0.txt or copy at
-// http://www.boost.org/LICENSE_1_0.txt)
-
-#define BOOST_AUTO_TEST_MAIN
-#include <boost/test/auto_unit_test.hpp>
diff --git a/test/test_log.cpp b/test/test_log.cpp
index 4915534..728eb20 100644
--- a/test/test_log.cpp
+++ b/test/test_log.cpp
@@ -111,7 +111,7 @@ namespace
 {
     struct streamable
     {};
-    std::ostream& operator<<( std::ostream& s, const streamable& )
+    BOOST_ATTRIBUTE_UNUSED std::ostream& operator<<( std::ostream& s, const streamable& )
     {
         BOOST_FAIL( "should not have been called" );
         return s;
@@ -131,7 +131,7 @@ namespace
 {
     struct mock_streamable
     {};
-    std::ostream& operator<<( std::ostream& s, const mock_streamable& )
+    BOOST_ATTRIBUTE_UNUSED std::ostream& operator<<( std::ostream& s, const mock_streamable& )
     {
         BOOST_FAIL( "should not have been called" );
         return s;
@@ -271,7 +271,7 @@ namespace
         operator streamable() const;
         template< typename T > operator T() const;
     };
-    std::ostream& operator<<( std::ostream& s, const ambiguous_convertible_streamable& )
+    BOOST_ATTRIBUTE_UNUSED std::ostream& operator<<( std::ostream& s, const ambiguous_convertible_streamable& )
     {
         BOOST_FAIL( "should not have been called" );
         return s;
@@ -297,7 +297,7 @@ namespace
         operator streamable() const;
         template< typename T > operator T() const;
     };
-    std::ostream& operator<<( std::ostream& s, const ambiguous_convertible_mock_streamable& )
+    BOOST_ATTRIBUTE_UNUSED std::ostream& operator<<( std::ostream& s, const ambiguous_convertible_mock_streamable& )
     {
         BOOST_FAIL( "should not have been called" );
         return s;