diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -109,6 +109,9 @@
     -DQT_DISABLE_DEPRECATED_BEFORE=0x050500
     -DQT_NO_SIGNALS_SLOTS_KEYWORDS
     -DQT_NO_URL_CAST_FROM_STRING
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
     -DQT_STRICT_ITERATORS
     -DQT_USE_QSTRINGBUILDER
     -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT
diff --git a/kdevplatform/CMakeLists.txt b/kdevplatform/CMakeLists.txt
--- a/kdevplatform/CMakeLists.txt
+++ b/kdevplatform/CMakeLists.txt
@@ -56,12 +56,6 @@
   set(COMPILER_OPTIMIZATIONS_DISABLED FALSE)
 endif()
 
-add_definitions(
-    -DQT_NO_CAST_FROM_ASCII
-    -DQT_NO_CAST_TO_ASCII
-    -DQT_NO_CAST_FROM_BYTEARRAY
-)
-
 add_subdirectory(sublime)
 add_subdirectory(interfaces)
 add_subdirectory(project)
diff --git a/plugins/astyle/3rdparty/libastyle/CMakeLists.txt b/plugins/astyle/3rdparty/libastyle/CMakeLists.txt
--- a/plugins/astyle/3rdparty/libastyle/CMakeLists.txt
+++ b/plugins/astyle/3rdparty/libastyle/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 set(astylelib_SRCS
     ASBeautifier.cpp
     ASEnhancer.cpp
diff --git a/plugins/astyle/tests/CMakeLists.txt b/plugins/astyle/tests/CMakeLists.txt
--- a/plugins/astyle/tests/CMakeLists.txt
+++ b/plugins/astyle/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 include_directories(${CMAKE_CURRENT_BINARY_DIR}/..)
 
 set(test_astyle_SRCS test_astyle.cpp
diff --git a/plugins/bazaar/tests/CMakeLists.txt b/plugins/bazaar/tests/CMakeLists.txt
--- a/plugins/bazaar/tests/CMakeLists.txt
+++ b/plugins/bazaar/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 # Running the test only makes sense if the bzr command line client
 # is present. So check for it before adding the test...
 FIND_PROGRAM(BZR_FOUND NAMES bzr)
diff --git a/plugins/clang/CMakeLists.txt b/plugins/clang/CMakeLists.txt
--- a/plugins/clang/CMakeLists.txt
+++ b/plugins/clang/CMakeLists.txt
@@ -12,10 +12,6 @@
     add_subdirectory(tests)
 endif()
 
-add_definitions(
-    -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_BYTEARRAY
-)
-
 # TODO: Move to kdevplatform
 function(add_private_library target)
     set(options)
diff --git a/plugins/clang/tests/CMakeLists.txt b/plugins/clang/tests/CMakeLists.txt
--- a/plugins/clang/tests/CMakeLists.txt
+++ b/plugins/clang/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 add_executable(clang-parser
     clang-parser.cpp
 )
diff --git a/plugins/clazy/tests/CMakeLists.txt b/plugins/clazy/tests/CMakeLists.txt
--- a/plugins/clazy/tests/CMakeLists.txt
+++ b/plugins/clazy/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(
     test_clazyjob.cpp
 
diff --git a/plugins/cmake/tests/CMakeLists.txt b/plugins/cmake/tests/CMakeLists.txt
--- a/plugins/cmake/tests/CMakeLists.txt
+++ b/plugins/cmake/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 configure_file("paths.h.cmake" "cmake-test-paths.h" ESCAPE_QUOTES)
 
 set(commonlibs Qt5::Test Qt5::Core KDev::Interfaces kdevcmakecommon)
diff --git a/plugins/cppcheck/CMakeLists.txt b/plugins/cppcheck/CMakeLists.txt
--- a/plugins/cppcheck/CMakeLists.txt
+++ b/plugins/cppcheck/CMakeLists.txt
@@ -1,11 +1,5 @@
 add_definitions(-DTRANSLATION_DOMAIN=\"kdevcppcheck\")
 
-add_definitions(
-    -DQT_NO_CAST_FROM_ASCII
-    -DQT_NO_CAST_TO_ASCII
-    -DQT_NO_CAST_FROM_BYTEARRAY
-)
-
 find_package(Cppcheck QUIET)
 set_package_properties(Cppcheck PROPERTIES
     DESCRIPTION "A tool for static C/C++ code analysis"
diff --git a/plugins/custom-buildsystem/tests/CMakeLists.txt b/plugins/custom-buildsystem/tests/CMakeLists.txt
--- a/plugins/custom-buildsystem/tests/CMakeLists.txt
+++ b/plugins/custom-buildsystem/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 configure_file(testconfig.h.in testconfig.h)
 
 ecm_add_test(test_custombuildsystemplugin.cpp ${custom_LOG_SRCS}
diff --git a/plugins/custom-definesandincludes/compilerprovider/tests/CMakeLists.txt b/plugins/custom-definesandincludes/compilerprovider/tests/CMakeLists.txt
--- a/plugins/custom-definesandincludes/compilerprovider/tests/CMakeLists.txt
+++ b/plugins/custom-definesandincludes/compilerprovider/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../..)
 
 set(test_compilerprovider_SRCS
diff --git a/plugins/custom-definesandincludes/tests/CMakeLists.txt b/plugins/custom-definesandincludes/tests/CMakeLists.txt
--- a/plugins/custom-definesandincludes/tests/CMakeLists.txt
+++ b/plugins/custom-definesandincludes/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/..)
 
 set(test_definesandincludes_SRCS
diff --git a/plugins/custommake/makefileresolver/tests/CMakeLists.txt b/plugins/custommake/makefileresolver/tests/CMakeLists.txt
--- a/plugins/custommake/makefileresolver/tests/CMakeLists.txt
+++ b/plugins/custommake/makefileresolver/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 set(test_custommake_SRCS
     test_custommake.cpp
 )
diff --git a/plugins/cvs/tests/CMakeLists.txt b/plugins/cvs/tests/CMakeLists.txt
--- a/plugins/cvs/tests/CMakeLists.txt
+++ b/plugins/cvs/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 # Due to the use of system() and some unix-style paths this test will only run
 # under Linux. (Maybe this can be fixed later)
 #
diff --git a/plugins/debuggercommon/tests/CMakeLists.txt b/plugins/debuggercommon/tests/CMakeLists.txt
--- a/plugins/debuggercommon/tests/CMakeLists.txt
+++ b/plugins/debuggercommon/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 get_filename_component(GDB_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../gdb ABSOLUTE)
 get_filename_component(LLDB_SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../lldb ABSOLUTE)
 configure_file(debuggers-tests-config.h.in debuggers-tests-config.h)
diff --git a/plugins/docker/tests/CMakeLists.txt b/plugins/docker/tests/CMakeLists.txt
--- a/plugins/docker/tests/CMakeLists.txt
+++ b/plugins/docker/tests/CMakeLists.txt
@@ -1,2 +1,8 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_docker.cpp
         LINK_LIBRARIES Qt5::Test Qt5::Core KDev::Interfaces KDevPlatformTests)
diff --git a/plugins/filetemplates/tests/CMakeLists.txt b/plugins/filetemplates/tests/CMakeLists.txt
--- a/plugins/filetemplates/tests/CMakeLists.txt
+++ b/plugins/filetemplates/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 configure_file(tests_config.h.cmake tests_config.h)
 
 add_subdirectory(data/testgenerationtest/templates)
diff --git a/plugins/gdb/unittests/CMakeLists.txt b/plugins/gdb/unittests/CMakeLists.txt
--- a/plugins/gdb/unittests/CMakeLists.txt
+++ b/plugins/gdb/unittests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_gdb.cpp
     LINK_LIBRARIES
         kdevgdb_static
diff --git a/plugins/genericprojectmanager/tests/CMakeLists.txt b/plugins/genericprojectmanager/tests/CMakeLists.txt
--- a/plugins/genericprojectmanager/tests/CMakeLists.txt
+++ b/plugins/genericprojectmanager/tests/CMakeLists.txt
@@ -1,2 +1,8 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_projectload.cpp
     LINK_LIBRARIES Qt5::Test KDev::Project KDev::Interfaces KDev::Tests)
diff --git a/plugins/git/tests/CMakeLists.txt b/plugins/git/tests/CMakeLists.txt
--- a/plugins/git/tests/CMakeLists.txt
+++ b/plugins/git/tests/CMakeLists.txt
@@ -7,6 +7,13 @@
         ..
         ${CMAKE_CURRENT_BINARY_DIR}/..
     )
+
+    remove_definitions(
+        -DQT_NO_CAST_FROM_ASCII
+        -DQT_NO_CAST_TO_ASCII
+        -DQT_NO_CAST_FROM_BYTEARRAY
+    )
+
     set(gittest_SRCS
         test_git.cpp
         ../gitplugin.cpp
diff --git a/plugins/grepview/tests/CMakeLists.txt b/plugins/grepview/tests/CMakeLists.txt
--- a/plugins/grepview/tests/CMakeLists.txt
+++ b/plugins/grepview/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 include_directories(
     ..
     ${CMAKE_CURRENT_BINARY_DIR}/..
diff --git a/plugins/kdeprovider/tests/CMakeLists.txt b/plugins/kdeprovider/tests/CMakeLists.txt
--- a/plugins/kdeprovider/tests/CMakeLists.txt
+++ b/plugins/kdeprovider/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 set(test_kdeprojectsreader_SRCS
     ../kdeprojectsreader.cpp
     ../kdeprojectsmodel.cpp
diff --git a/plugins/lldb/unittests/CMakeLists.txt b/plugins/lldb/unittests/CMakeLists.txt
--- a/plugins/lldb/unittests/CMakeLists.txt
+++ b/plugins/lldb/unittests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_lldb.cpp
     LINK_LIBRARIES
         kdevlldb_static
diff --git a/plugins/manpage/tests/CMakeLists.txt b/plugins/manpage/tests/CMakeLists.txt
--- a/plugins/manpage/tests/CMakeLists.txt
+++ b/plugins/manpage/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 set(test_manpagemodel_SRCS
     test_manpagemodel.cpp
     ../manpagedocumentation.cpp
diff --git a/plugins/outlineview/CMakeLists.txt b/plugins/outlineview/CMakeLists.txt
--- a/plugins/outlineview/CMakeLists.txt
+++ b/plugins/outlineview/CMakeLists.txt
@@ -1,11 +1,5 @@
 add_definitions(-DTRANSLATION_DOMAIN=\"kdevoutlineview\")
 
-add_definitions(
-    -DQT_NO_CAST_FROM_ASCII
-    -DQT_NO_CAST_TO_ASCII
-    -DQT_NO_CAST_FROM_BYTEARRAY
-)
-
 set(kdevoutlineview_SRCS
     outlineviewplugin.cpp
     outlinenode.cpp
diff --git a/plugins/perforce/CMakeLists.txt b/plugins/perforce/CMakeLists.txt
--- a/plugins/perforce/CMakeLists.txt
+++ b/plugins/perforce/CMakeLists.txt
@@ -1,3 +1,10 @@
+# temporary while patch series in work 08/2018
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 add_subdirectory(p4clientstub)
 ecm_qt_declare_logging_category(kdevperforce_LOG_PART_SRCS
     HEADER debug.h
diff --git a/plugins/projectfilter/tests/CMakeLists.txt b/plugins/projectfilter/tests/CMakeLists.txt
--- a/plugins/projectfilter/tests/CMakeLists.txt
+++ b/plugins/projectfilter/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 set(test_projectfilter_SRCS test_projectfilter.cpp
     ../projectfilter.cpp
     ../filter.cpp)
diff --git a/plugins/qmakemanager/parser/tests/CMakeLists.txt b/plugins/qmakemanager/parser/tests/CMakeLists.txt
--- a/plugins/qmakemanager/parser/tests/CMakeLists.txt
+++ b/plugins/qmakemanager/parser/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(parsetest.cpp ${qmakecommon_LOG_SRCS}
     TEST_NAME test_qmakeparse
     LINK_LIBRARIES
diff --git a/plugins/qmakemanager/tests/CMakeLists.txt b/plugins/qmakemanager/tests/CMakeLists.txt
--- a/plugins/qmakemanager/tests/CMakeLists.txt
+++ b/plugins/qmakemanager/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 set(QMAKE_TESTS_PROJECTS_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/manual")
 set(QMAKE_TESTS_PROJECTS_DIR "${CMAKE_CURRENT_BINARY_DIR}/manual")
 file(COPY ${QMAKE_TESTS_PROJECTS_SOURCE_DIR} DESTINATION "${QMAKE_TESTS_PROJECTS_DIR}/..")
diff --git a/plugins/qmljs/3rdparty/qtcreator-libs/CMakeLists.txt b/plugins/qmljs/3rdparty/qtcreator-libs/CMakeLists.txt
--- a/plugins/qmljs/3rdparty/qtcreator-libs/CMakeLists.txt
+++ b/plugins/qmljs/3rdparty/qtcreator-libs/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 qt5_wrap_ui(uifiles_SRCS
 	utils/projectintropage.ui
 	utils/filewizardpage.ui
diff --git a/plugins/qmljs/codecompletion/tests/CMakeLists.txt b/plugins/qmljs/codecompletion/tests/CMakeLists.txt
--- a/plugins/qmljs/codecompletion/tests/CMakeLists.txt
+++ b/plugins/qmljs/codecompletion/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_qmljscompletion.cpp
     LINK_LIBRARIES
         Qt5::Test
diff --git a/plugins/qmljs/duchain/tests/CMakeLists.txt b/plugins/qmljs/duchain/tests/CMakeLists.txt
--- a/plugins/qmljs/duchain/tests/CMakeLists.txt
+++ b/plugins/qmljs/duchain/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_qmljscontexts.cpp
     LINK_LIBRARIES
         Qt5::Test
diff --git a/plugins/qmljs/tests/CMakeLists.txt b/plugins/qmljs/tests/CMakeLists.txt
--- a/plugins/qmljs/tests/CMakeLists.txt
+++ b/plugins/qmljs/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 add_executable(qml-parser
     qml-parser.cpp
 )
diff --git a/plugins/qthelp/tests/CMakeLists.txt b/plugins/qthelp/tests/CMakeLists.txt
--- a/plugins/qthelp/tests/CMakeLists.txt
+++ b/plugins/qthelp/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 include_directories(${CMAKE_CURRENT_BINARY_DIR}/..)
 
 configure_file(testqthelpconfig.h.in testqthelpconfig.h)
diff --git a/plugins/quickopen/tests/CMakeLists.txt b/plugins/quickopen/tests/CMakeLists.txt
--- a/plugins/quickopen/tests/CMakeLists.txt
+++ b/plugins/quickopen/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 add_library(quickopentestbase STATIC
     quickopentestbase.cpp
     ../projectfilequickopen.cpp)
diff --git a/plugins/subversion/tests/CMakeLists.txt b/plugins/subversion/tests/CMakeLists.txt
--- a/plugins/subversion/tests/CMakeLists.txt
+++ b/plugins/subversion/tests/CMakeLists.txt
@@ -1,3 +1,9 @@
+remove_definitions(
+    -DQT_NO_CAST_FROM_ASCII
+    -DQT_NO_CAST_TO_ASCII
+    -DQT_NO_CAST_FROM_BYTEARRAY
+)
+
 ecm_add_test(test_svnrecursiveadd.cpp LINK_LIBRARIES
     Qt5::Test Qt5::Gui
     KDev::Tests KDev::Util KDev::Vcs