diff --git a/tests/auto/corelib/io/qdebug/CMakeLists.txt b/tests/auto/corelib/io/qdebug/CMakeLists.txt
index 15deeac2186..89d39c4375c 100644
--- a/tests/auto/corelib/io/qdebug/CMakeLists.txt
+++ b/tests/auto/corelib/io/qdebug/CMakeLists.txt
@@ -19,5 +19,6 @@ qt_internal_add_test(tst_qdebug
 )
 
 if (APPLE)
+    enable_language(OBJCXX)
     set_source_files_properties(tst_qdebug.cpp PROPERTIES LANGUAGE OBJCXX)
 endif()
diff --git a/tests/auto/corelib/io/qfileinfo/CMakeLists.txt b/tests/auto/corelib/io/qfileinfo/CMakeLists.txt
index 697b74199e1..24b1c3972a9 100644
--- a/tests/auto/corelib/io/qfileinfo/CMakeLists.txt
+++ b/tests/auto/corelib/io/qfileinfo/CMakeLists.txt
@@ -54,5 +54,6 @@ qt_internal_extend_target(tst_qfileinfo CONDITION WIN32
 )
 
 if (APPLE)
+    enable_language(OBJCXX)
     set_source_files_properties(tst_qfileinfo.cpp PROPERTIES LANGUAGE OBJCXX)
 endif()
diff --git a/tests/auto/gui/kernel/qwindow/CMakeLists.txt b/tests/auto/gui/kernel/qwindow/CMakeLists.txt
index 0504c774131..f65cf6bede9 100644
--- a/tests/auto/gui/kernel/qwindow/CMakeLists.txt
+++ b/tests/auto/gui/kernel/qwindow/CMakeLists.txt
@@ -31,6 +31,7 @@ if(APPLE OR WIN32)
     )
 
     if(APPLE)
+        enable_language(OBJCXX)
         set_source_files_properties(tst_foreignwindow.cpp PROPERTIES LANGUAGE OBJCXX)
         set_property(TARGET tst_foreignwindow PROPERTY PROPERTY MACOSX_BUNDLE TRUE)
     endif()