diff --git a/CMakeLists.txt b/CMakeLists.txt
index caa2d3b4b..4b3215218 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,11 +61,6 @@ include(CMakeDependentOption)
 # Allow IDE's to group targets into folders
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
-if(CMAKE_BUILD_TYPE STREQUAL Coverage)
-    include(CodeCoverage)
-    setup_target_for_coverage(CLI11_coverage ctest coverage)
-endif()
-
 file(GLOB CLI11_headers "${CMAKE_CURRENT_SOURCE_DIR}/include/CLI/*")
 # To see in IDE, must be listed for target
 
diff --git a/cmake/CodeCoverage.cmake b/cmake/CodeCoverage.cmake
index 879e8e59c..a1b7b8607 100644
--- a/cmake/CodeCoverage.cmake
+++ b/cmake/CodeCoverage.cmake
@@ -1,4 +1,4 @@
-# Copyright (c) 2012 - 2015, Lars Bilke
+# Copyright (c) 2012 - 2017, Lars Bilke
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without modification,
@@ -26,7 +26,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
-#
+# CHANGES:
 #
 # 2012-01-31, Lars Bilke
 # - Enable Code Coverage
@@ -35,164 +35,210 @@
 # - Added support for Clang.
 # - Some additional usage instructions.
 #
+# 2016-02-03, Lars Bilke
+# - Refactored functions to use named parameters
+#
+# 2017-06-02, Lars Bilke
+# - Merged with modified version from github.com/ufz/ogs
+#
+#
 # USAGE:
-
-# 0. (Mac only) If you use Xcode 5.1 make sure to patch geninfo as described here:
-#      http://stackoverflow.com/a/22404544/80480
 #
 # 1. Copy this file into your cmake modules path.
 #
 # 2. Add the following line to your CMakeLists.txt:
-#      INCLUDE(CodeCoverage)
+#      include(CodeCoverage)
 #
-# 3. Set compiler flags to turn off optimization and enable coverage:
-#    SET(CMAKE_CXX_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
-#	 SET(CMAKE_C_FLAGS "-g -O0 -fprofile-arcs -ftest-coverage")
+# 3. Append necessary compiler flags:
+#      APPEND_COVERAGE_COMPILER_FLAGS()
 #
-# 3. Use the function SETUP_TARGET_FOR_COVERAGE to create a custom make target
-#    which runs your test executable and produces a lcov code coverage report:
+# 4. If you need to exclude additional directories from the report, specify them
+#    using the COVERAGE_EXCLUDES variable before calling SETUP_TARGET_FOR_COVERAGE.
 #    Example:
-#	 SETUP_TARGET_FOR_COVERAGE(
-#				my_coverage_target  # Name for custom target.
-#				test_driver         # Name of the test driver executable that runs the tests.
-#									# NOTE! This should always have a ZERO as exit code
-#									# otherwise the coverage generation will not complete.
-#				coverage            # Name of output directory.
-#				)
+#      set(COVERAGE_EXCLUDES 'dir1/*' 'dir2/*')
 #
-# 4. Build a Debug build:
-#	 cmake -DCMAKE_BUILD_TYPE=Debug ..
-#	 make
-#	 make my_coverage_target
+# 5. Use the functions described below to create a custom make target which
+#    runs your test executable and produces a code coverage report.
 #
+# 6. Build a Debug build:
+#      cmake -DCMAKE_BUILD_TYPE=Debug ..
+#      make
+#      make my_coverage_target
 #
 
-# Check prereqs
+include(CMakeParseArguments)
 
-FIND_PROGRAM( GCOV_PATH gcov)
-FIND_PROGRAM( LCOV_PATH lcov )
-FIND_PROGRAM( GENHTML_PATH genhtml )
-FIND_PROGRAM( GCOVR_PATH gcovr PATHS ${CMAKE_SOURCE_DIR}/tests)
-
-IF(NOT GCOV_PATH)
-	MESSAGE(FATAL_ERROR "gcov not found! Aborting...")
-ENDIF() # NOT GCOV_PATH
-
-IF("${CMAKE_CXX_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
-	IF("${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS 3)
-		MESSAGE(FATAL_ERROR "Clang version must be 3.0.0 or greater! Aborting...")
-	ENDIF()
-ELSEIF(NOT CMAKE_COMPILER_IS_GNUCXX)
-	MESSAGE(FATAL_ERROR "Compiler is not GNU gcc! Aborting...")
-ENDIF() # CHECK VALID COMPILER
-
-SET(CMAKE_CXX_FLAGS_COVERAGE
-    "-g -O0 --coverage"
+# Check prereqs
+find_program( GCOV_PATH gcov )
+find_program( LCOV_PATH  NAMES lcov lcov.bat lcov.exe lcov.perl)
+find_program( GENHTML_PATH NAMES genhtml genhtml.perl genhtml.bat )
+find_program( GCOVR_PATH gcovr PATHS ${CMAKE_SOURCE_DIR}/scripts/test)
+find_program( SIMPLE_PYTHON_EXECUTABLE python )
+
+if(NOT GCOV_PATH)
+    message(FATAL_ERROR "gcov not found! Aborting...")
+endif() # NOT GCOV_PATH
+
+if("${CMAKE_CXX_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
+    if("${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS 3)
+        message(FATAL_ERROR "Clang version must be 3.0.0 or greater! Aborting...")
+    endif()
+elseif(NOT CMAKE_COMPILER_IS_GNUCXX)
+    message(FATAL_ERROR "Compiler is not GNU gcc! Aborting...")
+endif()
+
+set(COVERAGE_COMPILER_FLAGS "-g -O0 --coverage -fprofile-arcs -ftest-coverage"
+    CACHE INTERNAL "")
+
+set(CMAKE_CXX_FLAGS_COVERAGE
+    ${COVERAGE_COMPILER_FLAGS}
     CACHE STRING "Flags used by the C++ compiler during coverage builds."
     FORCE )
-SET(CMAKE_C_FLAGS_COVERAGE
-    "-g -O0 --coverage"
+set(CMAKE_C_FLAGS_COVERAGE
+    ${COVERAGE_COMPILER_FLAGS}
     CACHE STRING "Flags used by the C compiler during coverage builds."
     FORCE )
-SET(CMAKE_EXE_LINKER_FLAGS_COVERAGE
-    "--coverage"
+set(CMAKE_EXE_LINKER_FLAGS_COVERAGE
+    ""
     CACHE STRING "Flags used for linking binaries during coverage builds."
     FORCE )
-SET(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
-    "--coverage"
+set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
+    ""
     CACHE STRING "Flags used by the shared libraries linker during coverage builds."
     FORCE )
-MARK_AS_ADVANCED(
+mark_as_advanced(
     CMAKE_CXX_FLAGS_COVERAGE
     CMAKE_C_FLAGS_COVERAGE
     CMAKE_EXE_LINKER_FLAGS_COVERAGE
     CMAKE_SHARED_LINKER_FLAGS_COVERAGE )
 
-IF ( NOT (CMAKE_BUILD_TYPE STREQUAL "Debug" OR CMAKE_BUILD_TYPE STREQUAL "Coverage"))
-  MESSAGE( WARNING "Code coverage results with an optimized (non-Debug) build may be misleading" )
-ENDIF() # NOT CMAKE_BUILD_TYPE STREQUAL "Debug"
-
-
-# Param _targetname     The name of new the custom make target
-# Param _testrunner     The name of the target which runs the tests.
-#						MUST return ZERO always, even on errors.
-#						If not, no coverage report will be created!
-# Param _outputname     lcov output is generated as _outputname.info
-#                       HTML report is generated in _outputname/index.html
-# Optional fourth parameter is passed as arguments to _testrunner
-#   Pass them in list form, e.g.: "-j;2" for -j 2
-FUNCTION(SETUP_TARGET_FOR_COVERAGE _targetname _testrunner _outputname)
-
-	IF(NOT LCOV_PATH)
-		MESSAGE(FATAL_ERROR "lcov not found! Aborting...")
-	ENDIF() # NOT LCOV_PATH
-
-	IF(NOT GENHTML_PATH)
-		MESSAGE(FATAL_ERROR "genhtml not found! Aborting...")
-	ENDIF() # NOT GENHTML_PATH
-
-	SET(coverage_info "${CMAKE_BINARY_DIR}/${_outputname}.info")
-	SET(coverage_cleaned "${coverage_info}.cleaned")
-
-	SEPARATE_ARGUMENTS(test_command UNIX_COMMAND "${_testrunner}")
-
-	# Setup target
-	ADD_CUSTOM_TARGET(${_targetname}
-
-		# Cleanup lcov
-		${LCOV_PATH} --directory . --zerocounters
-
-		# Run tests
-		COMMAND ${test_command} ${ARGV3}
-
-		# Capturing lcov counters and generating report
-		COMMAND ${LCOV_PATH} --directory . --capture --output-file ${coverage_info}
-		COMMAND ${LCOV_PATH} --remove ${coverage_info} '*/tests/*' '*gtest*' '*gmock*' '/usr/*' --output-file ${coverage_cleaned}
-		COMMAND ${GENHTML_PATH} -o ${_outputname} ${coverage_cleaned}
-		COMMAND ${CMAKE_COMMAND} -E remove ${coverage_info} ${coverage_cleaned}
-
-		WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-		COMMENT "Resetting code coverage counters to zero.\nProcessing code coverage counters and generating report."
-	)
-
-	# Show info where to find the report
-	ADD_CUSTOM_COMMAND(TARGET ${_targetname} POST_BUILD
-		COMMAND ;
-		COMMENT "Open ./${_outputname}/index.html in your browser to view the coverage report."
-	)
-
-ENDFUNCTION() # SETUP_TARGET_FOR_COVERAGE
-
-# Param _targetname     The name of new the custom make target
-# Param _testrunner     The name of the target which runs the tests
-# Param _outputname     cobertura output is generated as _outputname.xml
-# Optional fourth parameter is passed as arguments to _testrunner
-#   Pass them in list form, e.g.: "-j;2" for -j 2
-FUNCTION(SETUP_TARGET_FOR_COVERAGE_COBERTURA _targetname _testrunner _outputname)
-
-	IF(NOT PYTHON_EXECUTABLE)
-		MESSAGE(FATAL_ERROR "Python not found! Aborting...")
-	ENDIF() # NOT PYTHON_EXECUTABLE
-
-	IF(NOT GCOVR_PATH)
-		MESSAGE(FATAL_ERROR "gcovr not found! Aborting...")
-	ENDIF() # NOT GCOVR_PATH
-
-	ADD_CUSTOM_TARGET(${_targetname}
-
-		# Run tests
-		${_testrunner} ${ARGV3}
-
-		# Running gcovr
-		COMMAND ${GCOVR_PATH} -x -r ${CMAKE_SOURCE_DIR} -e '${CMAKE_SOURCE_DIR}/tests/'  -o ${_outputname}.xml
-		WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-		COMMENT "Running gcovr to produce Cobertura code coverage report."
-	)
-
-	# Show info where to find the report
-	ADD_CUSTOM_COMMAND(TARGET ${_targetname} POST_BUILD
-		COMMAND ;
-		COMMENT "Cobertura code coverage report saved in ${_outputname}.xml."
-	)
-
-ENDFUNCTION() # SETUP_TARGET_FOR_COVERAGE_COBERTURA
+if(NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
+    message(WARNING "Code coverage results with an optimised (non-Debug) build may be misleading")
+endif() # NOT CMAKE_BUILD_TYPE STREQUAL "Debug"
+
+if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
+    link_libraries(gcov)
+else()
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
+endif()
+
+# Defines a target for running and collection code coverage information
+# Builds dependencies, runs the given executable and outputs reports.
+# NOTE! The executable should always have a ZERO as exit code otherwise
+# the coverage generation will not complete.
+#
+# SETUP_TARGET_FOR_COVERAGE(
+#     NAME testrunner_coverage                    # New target name
+#     EXECUTABLE testrunner -j ${PROCESSOR_COUNT} # Executable in PROJECT_BINARY_DIR
+#     DEPENDENCIES testrunner                     # Dependencies to build first
+# )
+function(SETUP_TARGET_FOR_COVERAGE)
+
+    set(options NONE)
+    set(oneValueArgs NAME)
+    set(multiValueArgs EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
+    cmake_parse_arguments(Coverage "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+    if(NOT LCOV_PATH)
+        message(FATAL_ERROR "lcov not found! Aborting...")
+    endif() # NOT LCOV_PATH
+
+    if(NOT GENHTML_PATH)
+        message(FATAL_ERROR "genhtml not found! Aborting...")
+    endif() # NOT GENHTML_PATH
+
+    # Setup target
+    add_custom_target(${Coverage_NAME}
+
+        # Cleanup lcov
+        COMMAND ${LCOV_PATH} --directory . --zerocounters
+        # Create baseline to make sure untouched files show up in the report
+        COMMAND ${LCOV_PATH} -c -i -d . -o ${Coverage_NAME}.base
+
+        # Run tests
+        COMMAND ${Coverage_EXECUTABLE}
+
+        # Capturing lcov counters and generating report
+        COMMAND ${LCOV_PATH} --directory . --capture --output-file ${Coverage_NAME}.info
+        # add baseline counters
+        COMMAND ${LCOV_PATH} -a ${Coverage_NAME}.base -a ${Coverage_NAME}.info --output-file ${Coverage_NAME}.total
+        COMMAND ${LCOV_PATH} --remove ${Coverage_NAME}.total ${COVERAGE_EXCLUDES} --output-file ${PROJECT_BINARY_DIR}/${Coverage_NAME}.info.cleaned
+        COMMAND ${GENHTML_PATH} -o ${Coverage_NAME} ${PROJECT_BINARY_DIR}/${Coverage_NAME}.info.cleaned
+        COMMAND ${CMAKE_COMMAND} -E remove ${Coverage_NAME}.base ${Coverage_NAME}.total ${PROJECT_BINARY_DIR}/${Coverage_NAME}.info.cleaned
+
+        WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
+        DEPENDS ${Coverage_DEPENDENCIES}
+        COMMENT "Resetting code coverage counters to zero.\nProcessing code coverage counters and generating report."
+    )
+    
+    # Show where to find the lcov info report
+    add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
+        COMMAND ;
+        COMMENT "Lcov code coverage info report saved in ${Coverage_NAME}.info."
+    )
+
+    # Show info where to find the report
+    add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
+        COMMAND ;
+        COMMENT "Open ./${Coverage_NAME}/index.html in your browser to view the coverage report."
+    )
+
+endfunction() # SETUP_TARGET_FOR_COVERAGE
+
+# Defines a target for running and collection code coverage information
+# Builds dependencies, runs the given executable and outputs reports.
+# NOTE! The executable should always have a ZERO as exit code otherwise
+# the coverage generation will not complete.
+#
+# SETUP_TARGET_FOR_COVERAGE_COBERTURA(
+#     NAME ctest_coverage                    # New target name
+#     EXECUTABLE ctest -j ${PROCESSOR_COUNT} # Executable in PROJECT_BINARY_DIR
+#     DEPENDENCIES executable_target         # Dependencies to build first
+# )
+function(SETUP_TARGET_FOR_COVERAGE_COBERTURA)
+
+    set(options NONE)
+    set(oneValueArgs NAME)
+    set(multiValueArgs EXECUTABLE EXECUTABLE_ARGS DEPENDENCIES)
+    cmake_parse_arguments(Coverage "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+    if(NOT SIMPLE_PYTHON_EXECUTABLE)
+        message(FATAL_ERROR "python not found! Aborting...")
+    endif() # NOT SIMPLE_PYTHON_EXECUTABLE
+
+    if(NOT GCOVR_PATH)
+        message(FATAL_ERROR "gcovr not found! Aborting...")
+    endif() # NOT GCOVR_PATH
+
+    # Combine excludes to several -e arguments
+    set(COBERTURA_EXCLUDES "")
+    foreach(EXCLUDE ${COVERAGE_EXCLUDES})
+        set(COBERTURA_EXCLUDES "-e ${EXCLUDE} ${COBERTURA_EXCLUDES}")
+    endforeach()
+
+    add_custom_target(${Coverage_NAME}
+
+        # Run tests
+        ${Coverage_EXECUTABLE}
+
+        # Running gcovr
+        COMMAND ${GCOVR_PATH} -x -r ${CMAKE_SOURCE_DIR} ${COBERTURA_EXCLUDES}
+            -o ${Coverage_NAME}.xml
+        WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
+        DEPENDS ${Coverage_DEPENDENCIES}
+        COMMENT "Running gcovr to produce Cobertura code coverage report."
+    )
+
+    # Show info where to find the report
+    add_custom_command(TARGET ${Coverage_NAME} POST_BUILD
+        COMMAND ;
+        COMMENT "Cobertura code coverage report saved in ${Coverage_NAME}.xml."
+    )
+
+endfunction() # SETUP_TARGET_FOR_COVERAGE_COBERTURA
+
+function(APPEND_COVERAGE_COMPILER_FLAGS)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${COVERAGE_COMPILER_FLAGS}" PARENT_SCOPE)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COVERAGE_COMPILER_FLAGS}" PARENT_SCOPE)
+    message(STATUS "Appending code coverage compiler flags: ${COVERAGE_COMPILER_FLAGS}")
+endfunction() # APPEND_COVERAGE_COMPILER_FLAGS
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 7a1def84f..11cffb2a0 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -103,3 +103,14 @@ if(Boost_FOUND)
     target_compile_definitions(OptionalTest PUBLIC CLI11_BOOST_OPTIONAL)
 endif()
 
+if(CMAKE_BUILD_TYPE STREQUAL Coverage)
+    include(CodeCoverage)
+    append_coverage_compiler_flags()
+    setup_target_for_coverage(
+        NAME CLI11_coverage
+        EXECUTABLE ctest
+        DEPENDENCIES
+          ${CLI11_TESTS}
+          ${CLI11_MULTIONLY_TESTS})
+endif()
+